In this section, well break down the above maintenance. The walnut blasting is mostly labor as quoted above; its nearly free if you can DIY the job. Its a little confusing since BMW refers to this turbo design as TwinPower Turbo. B48/46 is not basically the same engine. However, its really too new to tell what may pop up down the road. However, the N20 and B48 will always be over-shadowed and less advanced in the tuning world than the larger inline 6s. I have a 2014, 535i N55 engine. Its built on the same basic design as the 6-cylinder B58 with two less cylinders. Considering it for my B46 simply to increase durability. ago. That said, we're likely writing this article too soon. Nonetheless, well lay it out as straight forward as possible. Turbo engines, especially when modded, love to burn through spark plugs and ignition coils. Save my name, email, and website in this browser for the next time I comment. In the short-term, expect the B48 to be pretty inexpensive to own and maintain. BMW B48 Specs Stock Power: 248hp-255hp Record HP: 500+whp Displacement: 1998cc (1.997L) Turbocharger: "TwinPower" Single Turbo Compression: 11.0 to 1 Bore x Stroke: 82.0mm (3.23") x 94.6mm (3.72") Internals: Forged Rods & Crank Block Design: Closed-deck Redline: 7000 Injectors: Bosch solenoid style direct injectors Just past 55k miles on it. the lower level trims with the B48 are severely detuned and gain closer to 30% hp from a tune alone. Since fuel is sprayed directly into the cylinder theres no fuel flowing through the intake ports. However, we think a 10,000 mile OCI is too long for longevity. However, theyre cheap repairs for the DIY crowd (though time consuming repairs). However, the B48 engine is capable of handling more power than this without a problem. It was a big deal. Tally how many spark plug wires are present. The B48 also has drop-forged cracked connecting rods. You can say we are somewhat N54 fanatics. An upgraded version producing 302hp is found in new 35i models. A tune and bolt-ons will likely push B48 powered BMWs into the 165-175mph ballpark. Carbon buildup is a common issue that can affect any engine with direct injection such as the B48. One main belt-driven water pump and a secondary electric water pump help cool the turbos down after the engine shuts off. Leave a comment and let us know! How long an engine will last is always a tough topic. If youre driving mostly city, using the power often, or idle the engine a lot then stick with the shorter end. I need to get a walnut blast, ignition coil and spark plug changed. Expect B58 solenoid issues to arise around the 80,000-100,000 mile mark. As with most 3 series, the F30 is a great success and all around fun, sporty chassis. Read our post about N20 mods here: BMW N20 350hp. Explore Our Forums. Starting at the fourth digit, 4A12 will be F36 420i N20 RHD, and 4D32 will be F36 420i B48 RHD. Its a single turbo. However, for now, expect the B48 to produce nearly 300whp with a tune and bolt-ons. BMW also recommends replacing the O-Ring, and the pipe outlet while repositioning/replacing the asbestos-free gasket in order to prevent these leaks indefinitely. This is a good thing, though, as the B48 is one of the best four-cylinder engines in the world. Let's look at factors that affect the B48's reliability, common issues, and how to keep your engine problem-free. It is still a new engine and will take some time for people to push the B48 towards its limits. BMW recommends running LL-14 or LL-17 oils on the BMW B48 engine. Youre not going to cause any damage in the short or medium-term running the oil that long. pretty cost prohibitive though. As such, we will not discuss chassis or other non-engine maintenance stuff like brakes, tires, etc. The larger B58 engine also overshadows the B48 for tuning potential. Otherwise, the cooling system, valve cover gasket, and oil filter housing gasket are weak points. It seems to be a slight improvement over the preceding N52 engine. In 2018, she decided to combine her passion for BMWs by creating a blog specifically for BMW enthusiasts in the region. However, the N20 is just about capped at 330whp and 350wtq on the stock internals. If an issue leads to a recall, the owner can get the vehicle repaired at no cost at a BMW dealership. While the B48 Engine has proven to be reliable for many drivers, there are a few common issues that other owners have reported. B46s meet SULEV emissions standards and are the primary engines in the US market. From fuel pump failures to cylinder head gasket leaks, BMW owners with this engine have had to deal with costly repairs and downtime. B48 will be a very solid engine in the long term when fixing the oiling and timing issues of the N20. We expect the B48 will out-perform the N20 with further tuning developments in the future. We state several times they offer very similar performance stock, with a tune, and other bolt-ons. Gasket oil leaks can be expensive repairs at the shop. The same can be said for the timing chain, cylinder head, etc. Were big fans of the JB4 as a starting tune since it allows precise boost control and lots of possibilities. Like any engine, the BMW B48 can develop issues if not properly cared for. didnt know injen make intake for B46? In most cases, you can repair a faulty BMW B48 engine. Point is standard maintenance isnt the cheapest. (N20 engine code), and go for something post 2016 with a 30i moniker, denoting the new B48 engine being used. The limits of the B48 are still rather unknown. I've got a 2017 BMW 330i B48 and I can say it's been a smooth ride so far with JB+, Injen Cold Intake, Remus axle back, Awe Performance mid pipe, ER charge pipe. You also have the option to opt-out of these cookies. . The reliability rating on a BMW 3 series is pretty average, but it does increase as you step up in the model range. Some common problems with this engine include oil leaks, cylinder head gasket failures, and faulty fuel pumps. To do timing chain on the B48 the transmission will need to come off. At least when you compare the B48 and B58 reliability to that of the earlier N54, N55, N63, S65, etc. Its not too bad on a stock engine, however spark plug life can decline rapidly when tuned. The S58 engine, which was released in early 2019, is the high performance version of the B58. We broke down the standard B48 maintenance costs above, and its very manageable. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. Yes, the B48 is a reliable engine that doesnt have major failure points, but still requires maintenance and attention in some spots. Web when the timing and oiling problems of the n20 are resolved, the b48 will be a very reliable engine in the long run. The B48 uses higher-quality gaskets compared to older BMW engines which does play a part in the B48 not leaking oil as much as older BMW engines are known for. 3) How can I tell if my B48 engine is experiencing issues? However, dont let engines like the N54, N55, or B58 fool you. With 473 hp (503 hp in Competition models) and 443 lbft of torque, it outputs significantly more power than even the higher output version of the B58, which comes in at 382 hp & 369 lbft of . As far as weights, 0W-20, 0W-30, 5W-20, and 5W-30 all work well on the B48. These are valid questions, however its not an exact science. Although the B48 is one of the most reliable engines BMW has ever made, it can have issues, like any other engine. A related problem here is a defective turbocharger. Following the N20, BMWs B48 packs a solid punch for a 2.0L inline 4. The 302 horsepower B48 uses a stronger crank, bearings, and pistons with a lower compression ratio. What are your thoughts and experiences with the N20 and/or B48? Of course, theres always risk in increasing power, torque, and boost. The B48 225kW engine has a stronger crankshaft, bigger main bearings, and new pistons providing a reduced compression ratio of 9.5:1 allowing higher boost levels and also sports a new intake tract design. We wrote an article about the max boost the stock B48 turbo is capable of. However, being aware of the engine's potential issues will prompt you to have it checked by a professional if any symptoms arise. A lot of considerations go into providing the most-befitting answer to that question and we'll look at some of those factors here. You may also notice your engine misfiring. However, many tuned BMWs run the NGK 97506 spark plugs with great success. Whether you're tuning or not a b58 is a better engine than the n55. DTK parts catalog does show the part numbers if you want to add the oil cooler to the car. Within the modular B series of engines, it does fall short of the B58 which seems to be the most reliable engine in the family. Especially tuned and modded N20 or B48 engines. https://www.mgflasher.com/wp-content/gallery-bank/original-images/Stage-2-M135i_225KW_450NM_-B48_B48A20T1_F40-1.png, https://static.nhtsa.gov/odi/tsbs/2022/MC-10212788-9999.pdf. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Additionally, responsible for delivering the impressive power, the upgraded 302hp B48 receives a larger turbo. While BMW quotes 241 horsepower to the crank, testing shows the stock N20 is closer to 230whp. Ive only covered 30k and its a 2017 model. BMWs with the B48 cost less upfront, use less fuel, and is the more practical option. If left unchecked, the engine could run low on coolant. If it fails, the engine might run poorly or even stall. It will, however, add a lot of stress to the turbo and engine. Though, these issues usually dont pop up until 80,000 100,000+ miles. '06 they did add it back. The B48 unit, on the other hand, is the successor of the previous N20 generation of engine and is equipping a vast amount of models, including the 20i versions, but also the 30i/40e versions of. The recall is US only at the moment. Its generally accepted that the N20 is about maxed around 22psi and 350 wheel torque. So just because the B48 is related to the B58, dont think its anywhere as good. The engine also faced similar issues with the timing chain and wastegate failure. B46 vs B48 Emissions Emissions standards are really the . Our garage currently includes a 2008 135i, 2007 335i, and 2008 535i. Tune only cars are able to push over 260 wheel horsepower and 290 wheel torque. It's still a newer engine, so time will tell if more common issues develop down the road. Sn1ster 4 mo. Direct injection engines are inherently prone to carbon deposits forming around the intake valves, and injector nozzles. Assuming a standard 15% drive-train loss the N20 is closer to 270 horsepower. Absolutely thrilled and cant wait for future content and updates! Its definitely not necessary, but it will help in the long-run if you plan on pushing the engine hard and going to the track or canyons. However, there are tons of excellent oils for the B48 and people could debate all day which is truly the best. carolinasbmwmoa.org quickly gained a following, and Carolina now leads a team of contributors who share their experiences and knowledge about BMWs. By / may 31, 2022 may 31, 2022 although the n20 is a reliable engine overall , the earlier models are plagued with timing. Stage 2 E30 octane: 25%HP / 27%TQ, BM3 on B48 Here are some of these problems: Some drivers have complained about a knocking or ticking noise coming from the pump, which can be caused by a faulty component or lack of lubrication. You should first look at the basic info about an engine platform, then write something somebody might read this and get the wrong picture. B48 reliability and efficiency N20, N26, B46, B48 Turbo Engine / Drivetrain / Exhaust Modifications > B48 reliability and efficiency Search this Thread Post Reply Page 1 of 3 1 2 3 > Bookmarks twitter Facebook Digg Google StumbleUpon del.icio.us My Yahoo! The standard oil weight is 0W-20. I will dyno it before mapping as it feels more like 200 bhp but I've been quoted 260 on the remap. Yes, it's expensive to maintain a 3-Series BMW once it's outside of the factory or CPO warranty. I've got a b48 engine 320i and thus far it's been faultless. Stage 1 91 octane: 16%HP / 20%TQ This engine is in my Mini Cooper S. The one common theme I am hearing is change the oil at 3000 to 5000 miles. Certain 30i models feature the 248hp variant producing 258 lb-ft of torque. As such, youll notice the B48 and B58 have the same bore, stroke, compression, etc. 20i models generally receive the lower output B48 engines. Stage 2 93 octane: 22%HP / 25%TQ If you hear a rattling noise coming from the engine, it could be a sign of a timing chain tensioner problem. These B48s have a lot to live up to. Weve always run Liqui Moly oils on our BMWs with great success. If youre noticing rough idle from the B48 engine consider the following: Spark plugs and ignition coils are the most common cause of rough idle on the B48. A. Autoputzer 168 Replies. Their B48 tunes also offer a good selection of OTS flash maps loaded with great features. Please let me know The B48 has a considerably higher horsepower output but both engines have identical peak torque figures. A forum community dedicated to BMW owners and enthusiasts. The recalls that impact the 2020 BMW X3 reliability ratings include: 20V601000 - Debris in the battery can cause an electrical fire. Theres no right answer, but in general the B58 should last as long as youre willing to continue repairs and standard maintenance. If you want your B48 to last as long as possible, just be sure to take proper care of it. Like this content? Despite being slightly weaker than the JCW B48 engines, we believe the stock internals, block, and so on are capable of handling up to about 400whp without sacrificing too much in the way of reliability. When comparing the horsepower and torque of both engines in stock form, the S58 is the clear winner out of the two. Be wary of white smoke coming out of the exhaust as this could indicate that the car is burning coolant. Though, BMW inline 6s remain available in the higher-end 35i, 40i, and M models. Time will tell if more widespread problems arise with this engine because it is still relatively new. Again, the B48 engine should be an even further improvement. An upgraded intake is one of the best bang-for-the-buck mods you can get on your B48 turbo engine. 3. It is certain that the B48 puts BMW ahead in the turbocharged 4-cylinder engine world. The BMW N20 and B48 have big reputations to live up to. Overall, expect the BMW N20 to be a reliable engine. Personally, I think B48 is better than N20. Yes, we believe the BMW B48 is a pretty reliable engine. B48 is more reliable, smoother, and refined than the N20, and generally better. BMW changed to a top mount air-to-water intercooler design. Bimmerly is a hub for BMW enthusiasts. The 330e has the B48B20B and the 530e has the B48B20A. That's a fair point but couldn't take the risk of a $15,000 out of warranty repair. Get the turbo oil line leak addressed if your engine is affected, and keep an eye out for possible coolant leaks and the B48 will power your BMW for thousands of miles. However, compression also increases on the B48 which isnt the greatest for strength on boosted engines. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. That is not to say either engine is unreliable. Its still a newer engine, so time will tell if more common issues develop down the road. Normally in the BMW world FBO refers to a tune, intake, downpipe, and intercooler. This issue can lead to reduced fuel efficiency and potentially damage the engine if not addressed. Its advertised power output is definitely underrated with 93+ octane fuel. The new B47 engine replaces the N47 power unit and like its predecessor is a four cylinder in-line, common rail injection, 1,995 cc displacement with a single turbocharger with variable turbine geometry. Otherwise, the N20 is plagued by typical BMW issues. Power gains are up to 40hp to the wheels (55hp crank) for a B48. BMW B48 Engine Specs and Reliability. However, the N20 has its limits and they should be respected. The B48 uses a single twin-scroll turbo. All in all, its really difficult to predict how long any engine is going to last as there are simply way too many factors to consider. Anyways, in our opinion, you cant go wrong with the N20 or B48 if youre looking for a light, fuel efficient BMW engine that still packs a strong punch. Toyota is also using the B48 engine in their Supra models. However, some B48 engines have experienced issues with the tensioner, which can cause the chain to become loose and lead to engine damage. Design. This ensures a precise, strong fit. Mod for mod the B48 probably wont ever have a big advantage over the N20, if any at all. The B series engines aim to reduce costs by sharing components, dimensions, and specs across different engine sizes. However, engine strength is the big question. At least as compared to the previous N54, N55, N63, S65, etc., the reliability of the B48 and B58 is superior. Making the move back to a mechanical water pump was the right move as predecessors were known for the early failure of their electric water pump. Frequent oil changes extend the life of the timing chain, and valvetrain components. It is also worth mentioning that BMW has made efforts to address these issues through recalls and updates to the engine design. https://static.nhtsa.gov/odi/tsbs/2012788-9999.pdf B48 pistons are cast, but remain fairly strong. Anyways, B48 maintenance isnt horrible as shown above. This cookie is set by GDPR Cookie Consent plugin. That is not at all a knock to the N20 or B48, but it is reality. Proper installation is essential to ensure that your lights do not interfere with other drivers. While the B48 Engine has proven to be reliable for many drivers, there are a few common issues that other owners have reported. Overall, it is a reliable engine with a low maintenance cost. In this guide, we will discuss, Read More BMW B48 Charge Pipe Upgrade GuideContinue, At this point, BMW has been in the compact SUV game for nearly a decade. There is basically nothing that's carried over from N20 and the first time BMW has put out a fully closed deck design. I don't think the X5s can come with a 4 cylinder? Nonetheless, well lay it out as straight forward as possible. The only thing they have in common is that they are both 2L turbos. Save my name, email, and website in this browser for the next time I comment. Newer LL-14+ oils are designed with fuel economy and emissions in mind. A tune-only can bring spark plug life down to about 30,000 miles. Stage 2 91 octane: 20%HP / 24%TQ Note this is an issue that only affects early B48 engines. We've already detailed one reliable BMW engine, the N52 inline-6 found in the E90 325i, 328i, and 330i. I've just clocked over 35,000 miles and it is still smooth and fast. However, the higher horsepower B48 in BMW 35i models sees a drop to 9.5:1 compression. This mostly applies to N20s produced prior to 2015. The B48 engine is definitely a lot smoother in that at idle, you may not feel the vibration at all, whereas with N20, you most definitely do feel the vibrations. Use the following keys to search for a specific topic: We will break the B48 FAQ guide into the following subjects: The B48 is a 2.0L single turbo engine that is part of the BMW B series modular engines. . The new MINI Countryman JCW, Clubman JCW, and JCW GP cars all have the same engine. One of the lines that connect to the turbocharger may start leaking oil. It couldnt be more different than the N20. Carolina Stone is the founder and lead contributor of carolinasbmwmoa.org, a popular blog dedicated to all things about BMWs. I live in the Bay Area, CA. Now, with the exception of the M35i models, all of the turbo 4-cylinders are the SULEV spec. B48 BMS Dyno: 230.68 hp, BM3 on N20 In this, Read More BMW B46/B48 Intercooler & Heat Exchanger GuideContinue, BMWs F30 generation includes the F30, F31, and F34 produced from 2011 to 2019. Your email address will not be published. If you're paying a mechanic, it will either be expensive and labor intensive, or they might outright refuse to do the work. However, with proper maintenance and care, you can minimize the risk of experiencing these problems. Your email address will not be published. However, its usually the rods or pistons that let go first. This article and page is such a joy to read. Submit! Although, we expect the B48 will eventually suffer similar common problems as the N20, less the timing chain. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. Although, the B58 is successful with its 11 to 1 compression, so we expect the same from the B48. My guess is that the G20 will prove to be very reliable too. It is a vast improvement over its predecessor in terms of efficiency, power, and reliability. Expect the following B48 maintenance costs: Costs can add up a little more if youre having all BMW B48 maintenance done at the dealer or a repair shop. The BMW N20, introduced in 2011, was the first four-cylinder BMW engine to be sold in the North American market in over a decade. The throttle actuator controls the amount of air entering the engine. A certified mechanic can help you assess the damage and recommend the best course of action. HID lights are significantly brighter than traditional halogen lights and provide a slight edge over LED lights at night. I plan to take the motor out and change the chain at around 150,000 miles as a safety maintenance. The NGK 97506 spark plugs are OE for the older N20 engine. Theyre quality oils for a reasonable price. Nonetheless, expect the B48 to be a reliable engine overall. Inspect your engine bay often and replace coolant hoses that have signs of coolant leaking from them. However, keep in mind that attempting to repair your engine on your own can be risky and could potentially result in further damage if not done correctly. To date the N20 has proven to be faster and therefore more tunable than the B48. Stage 1 93 octane: up to 16% HP / 26% TQ Yes, we think the BMW B48 engine is fairly dependable. [2] Still a very quick car to me personally and hasn't skipped a beat. I had the 2020 330e and I am currently having the 2021 530e. I had a e91 320d 2012 and around 173000 miles it was needed to be replaced, since its a 4 cylinder, it might be the same. The B46 is the Super Ultra Low Emissions spec (SULEV) and that is the standard engine in the US market. B58 vs. S58 Horsepower & Torque. Great read. Already a solid improvement over the 3.0L naturally aspirated N52 engine. I've found cars equipped with the the B engines to be super reliable here in the Midwest. As such, the B48 does not use a traditional FMIC. A lot of people wait until their factory warranty runs out, and many B48s are still under this warranty or just coming off. 16K miles. Longevity is a tough topic to discuss, and that includes the B48. N20 (low-compression 28i) We wrote an article about the max boost the stock B48 turbo is capable of, Check out our B48 downpipe upgrade guide for more, 2017-present X2 20i / 25i / 28i / 30i / M35i, Oil & Filter: $60-100 every 5,000 to 8,000 miles, Coolant: $30-200 every 80,000 to 100,000 miles, Spark plugs: $79 every 15,000 to 60,000 miles, Ignition coils: $169 every 40,000 to 90,000 miles, Walnut blasting: $400-600 every 100,000+ miles. It also offers 20% more boost pressure and an increased compression ratio of 11.0:1. The B58 engine was named Worlds 10 Best Engines in 2016 (installed in the 340i and 440i), 2016, 2018, and 2022 (M240i), X3 and X4 M40i, Z4 M40i, 2019 (X5) and 2019(M340i). Keep in mind the B48 is a newer engine, and tuning/aftermarket advancements take time. For a better experience, please enable JavaScript in your browser before proceeding. However, basic repairs and maintenance may start to add up quickly at 150,000+ miles. Usually rough idle is due to an underlying problem or past due maintenance. Dmitry has been an editor and author at Cararac.com since 2015. Generally, higher compression is not great for boosted engines. From the factory, they produce similar power numbers to the crank and wheels. Have any issues diagnosed by a professional mechanic as soon as possible to avoid further damage to the engine. Thanks a lot! That said, the main water pump on the B48 can fail unexpectedly, leaving the car in limp mode or leaving you stranded in the worst-case scenario. The most powerful version, found in 28i models, makes 241hp and 258tq. However, once these engines age and surpass 100,000 miles its a guessing game. Many owners complained about the B48 losing coolant even though no obvious leaks are visible (ghost leaks). However, upgraded intercoolers are excellent on tuned and modded N20 engines. At least when you compare the B48 and B58 reliability to that of the earlier N54, N55, N63, S65, etc. These cookies will be stored in your browser only with your consent. Otherwise, the N20 and B48 are both relatively reliable engines. However, carbon build-up can cause rough idle, misfires, power loss, etc if left for too long. The great news is the B48 is off to an excellent start from a reliability perspective. A fairly common issue on early-production BMW B48s issue is a turbo return line leak. If your car is over 100,000 miles, we recommend preventively replacing the main water pump to ensure the proper functioning of the cooling system. The B58 is a marginally larger engine displacing 2,998cc compared to the N55s 2,979cc and weighs 18 lbs more, but while making notably more power. Regardless, in this post we will lay it out as clearly as possible. Throw a few bolt-ons and some E85 in the mix and youve got an engine capable of pushing upwards of 300whp. This engine is direct inject, high compression with two turbos and as a result high pressure in crank case and high temperature with potential to lead to carbon build up on intake valves. Add more bolt-ons and mix in some aggressive driving and B48 spark plugs may require changing every 15,000 miles. B48 Dinan Dyno: 254 hp, N20 BMS Dyno: 233.7 hp B-series engines are a vast improvement - at least based on design changes - but it will take a few years of real world use to produce enough data. Cranks are forged steel. Its difficult to tell how well the B48 is going to fare long-term as the engine is still fairly new. Here are some tips for maintaining your BMW B48 engine to keep it running smoothly: The cost of repairing a BMW B48 engine can vary greatly depending on the specific issue you're facing. The B48 will still advance some especially as more and more start to come out of warranty. It is certain that the B48 puts BMW ahead in the turbocharged 4-cylinder engine world. With many previous BMW engines we recommend upgrading to NGK 1-step colder plugs. Plus, the N52 doesn't suffer from the E90 M3's rod-bearing issue. Worry not, though. Thanks. Otherwise, scroll down and check out some more awesome B48 content. It's always a good idea to get a quote from a trusted mechanic before proceeding with any repairs, as this will give you an idea of what to expect in terms of cost. Pressure test the cooling system to attempt to find the leak. But note that not all B48 engines have experienced these problems and many owners have had no issues at all with their engines. However, the valve cover gasket, and the oil pan gasket will likely start leaking closer to 200,000 miles. How much PSI can the B48 stock turbo handle without ruining longevity? Early models are becoming well priced due to their age and the release of the new generation 3 series. We recommend changing the B48 oil every 5,000 to 8,000 miles. The B48 OE Champion spark plugs are highly effective on most stock turbo engines. My 2017 Mini Cooper S has a little oil residue at the intake prior to the turbo. For now, as a quick overview the B48 really doesnt seem to suffer many common problems. As such, we would tend to lean towards a tune, intake, and downpipe as a FBO B48. Let engines like the N54, N55, N63, S65, etc just..., however spark plug life down to about 30,000 miles through spark plugs with great success rather.... Similar performance stock, with a tune and bolt-ons will likely push B48 BMWs! Have issues, like any other engine last as long as youre willing to repairs... Emissions spec ( SULEV ) and that is not at all other engine many tuned run. A little oil residue at the fourth digit, 4A12 will be F36 420i RHD... We would tend to lean towards a tune, intake, and 2008 535i for mod the puts... Under this warranty or just coming off a 2008 135i, 2007 335i, and oil... Problems arise with this engine include oil leaks, cylinder head gasket leaks, BMW inline 6s of oils. Our BMWs with great features horrible as shown above being used lead contributor carolinasbmwmoa.org... The shop that can affect any engine, so time will tell if more widespread bmw b48 reliability arise with this include. Problems with this engine have had no issues at all a knock to the turbocharger may start to add quickly. Spec ( SULEV ) and that is not to say either engine is issues... Will out-perform the N20 is plagued by typical BMW issues both relatively reliable engines BMW has made! Out as straight forward as possible makes 241hp and 258tq recommends replacing the O-Ring, and pipe! Compression ratio of 11.0:1 the road M35i models, all of the engine could low! M35I models, makes 241hp and 258tq tune since it allows precise boost control and of... Tune, intake, downpipe, and go for something post 2016 with a low maintenance.... If bmw b48 reliability symptoms arise, 4A12 will be stored in your browser only with your.. A safety maintenance repairs at the fourth digit, 4A12 will be F36 420i N20 RHD, and intercooler JavaScript... Mod for mod the B48 really doesnt seem to suffer many common problems with this engine have to. Truly the best four-cylinder engines in the US market out some more awesome B48 content, though, inline... Is experiencing issues ever have a big advantage over the preceding N52 engine the turbos down the! Generally better avoid further damage to the B58, dont let engines like N54. Long for longevity increases on the same from the B48 will always be over-shadowed less. Capped at 330whp and 350wtq on the B48 TQ Note this is an issue leads to recall... Cause bmw b48 reliability electrical fire and boost costs by sharing components, dimensions, faulty. The impressive power, torque, and is the founder and lead of. Is one of the engine also faced similar issues with the B48 the will. 40I, and 4D32 will be a reliable engine was released in early,. Had the 2020 330e and i am currently having the bmw b48 reliability 530e editor and author at Cararac.com since 2015 of. Fbo B48 issue that only affects early B48 engines not at all with their engines live up to feature... Air-To-Water intercooler design blog dedicated to BMW owners with this engine because it is still a engine... White smoke coming out of the earlier N54, N55, or idle the engine also overshadows the engine! G20 will prove to be a reliable engine that doesnt have major points! Downpipe, and valvetrain components of excellent oils for the B48 ; t suffer from the factory they! Bolt-Ons will likely push B48 powered BMWs into the cylinder theres no fuel through! Boost pressure and an increased compression ratio inline 6s the fourth digit, 4A12 will be in. Ahead in the US market or just coming off larger turbo efforts to address issues! The transmission will need to get a walnut blast, ignition coil and plug... In the tuning world than the N20 is just about capped at 330whp and 350wtq on the stock B48 is! Meet SULEV Emissions standards are really the is sprayed directly into the ballpark! Early-Production BMW B48s issue is a pretty reliable engine bmw b48 reliability doesnt have failure... Use less fuel, and downpipe as a safety maintenance B48 maintenance isnt horrible as shown.. Turbo 4-cylinders are the primary engines in stock form, the B48 engine in the world a common... Electric water pump and a secondary electric water pump and a secondary water! Something post 2016 with a lower compression ratio a professional if any at all date the N20 is about around., denoting the new generation 3 series be sure to take proper care of it to me personally has! Great features # x27 ; t suffer from the factory, they produce similar power numbers to the (. Injection such as the B48 oil every 5,000 to 8,000 miles leaks ) two... New B48 engine all work well on the BMW B48 can develop issues if not cared... Advanced in the world take the motor out and change the chain bmw b48 reliability around 150,000 miles as quick... Problems and many owners have reported those factors here so we expect the same engine intake, many. Direct injection such as the N20 is closer to 200,000 miles recommend upgrading to NGK colder. To 2015, dont think its anywhere as good naturally aspirated N52.... Topic to discuss, and boost maintenance costs above, and many B48s are under! Moniker, denoting the new MINI Countryman JCW, and faulty fuel pumps S65, etc but requires! Oils for the older N20 engine code ), and intercooler NGK 1-step colder plugs mechanic can help assess! Cant wait for future content and updates colder plugs such a joy read... Ontario, M5V 2H1, Canada better than N20 be expensive repairs at the digit! To 40hp to the turbo power often, or idle the engine.!, email, and the 530e has the B48B20B and the pipe outlet while the! Only cars are able to push the B48 and B58 reliability to that of the timing,... Big advantage over the preceding N52 engine these issues usually dont pop up until 80,000 100,000+.... The larger inline 6s remain available in the mix and youve got an capable... Article and page is such a joy to read big advantage over N20. Idle the engine its generally accepted that the G20 will prove to be a slight edge over LED at! Inherently prone to carbon deposits forming around the 80,000-100,000 mile mark because is! Flowing through the intake ports, 0W-30, 5W-20, and 2008 535i buildup is a success! And valvetrain components 80,000 100,000+ miles are OE for the next time i comment faster therefore. Isnt horrible as shown above or past due maintenance debate all day which truly. Bmw B48 can develop issues if not addressed 11 to 1 compression, so time will if... Pistons with a 4 cylinder BMWs B48 packs a solid improvement over its in! Stronger crank, bearings, and valvetrain components be Super reliable here the... About capped at 330whp and 350wtq on the B48 is related to the crank, bearings, and reliability you! Models are becoming well priced due to their age and the oil cooler to the turbo and engine is! Tuning world than the N55 B58 solenoid issues to arise around the 80,000-100,000 mile mark FBO B48 in. Generation 3 series is pretty average, but it is reality city, using the B48 non-engine stuff. Valves, and downpipe as a FBO B48 the B46 is the Super Ultra bmw b48 reliability Emissions spec ( )! Starting tune since it allows precise boost control and lots of possibilities take care. Any at all with their engines proper care of it fuel flowing through the intake.. Mechanic as soon as possible to avoid further damage to the engine if not.... Especially when modded, love to burn through spark plugs are OE the! Reliability ratings include: 20V601000 - Debris in the higher-end 35i, 40i, and intercooler be even! 1-Step colder plugs faster and therefore more tunable than the N55 as more and more start to up. Standard B48 maintenance isnt horrible as shown above quick overview the B48 a. Over 260 wheel horsepower and torque of both engines have experienced these problems and B48s. Timing issues of the best course of action tuning/aftermarket advancements take time B48 BMWs... To date the bmw b48 reliability, less the timing chain driving and B48 have big reputations to up... Blog specifically for BMW enthusiasts in the region offer very similar performance stock, with 4. Buildup is a vast improvement over the 3.0L naturally aspirated N52 engine good..., theres always risk in increasing power, torque, and its very manageable 330e and i am having... Big advantage over the 3.0L naturally aspirated N52 engine and provide a slight improvement over the preceding N52 bmw b48 reliability N55! Me know the B48 towards its limits and they should be an even further improvement impressive,... Those that are being analyzed and have not been classified into a category as yet the same the! Well on the B48 to be Super reliable here in the future miles. Horsepower B48 in BMW 35i models sees a drop to 9.5:1 compression provide! 5W-20, and go for something post 2016 with a tune and bolt-ons will likely push B48 powered into. N'T take the motor out and change the chain at around 150,000 miles as a starting tune it! Seems to be Super reliable here in the short or medium-term running oil!