They did tweak the design a little bit, but its still a testament to the reliability of the B48. 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. You could do a full big turbo stock block b58 build in a day on stands with a floor jack. Save my name, email, and website in this browser for the next time I comment. Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features. Otherwise, the B48 receives a noteworthy improvement in moving to a closed-deck block compared to the open-deck block in the N20. A few common standard maintenance items for the BMW B48 include: These are the primary standard maintenance items on the B48 engine. It is a rather serious issue as its a costly repair, and may cause severe engine damage in rare cases. B46 vs B48 Emissions Emissions standards are really the . This cookie is set by GDPR Cookie Consent plugin. Stage 1 91 octane: 16%HP / 20%TQ Keep up the good work!!! As you can see, from very early on the B58 has big gains over the N55 which it holds right through the rev range. A catless downpipe on the B48 will offer about 15-25whp gains. It's not that expensive and will require a tow given the size of the leak when it breaks. Leave a comment and let us know! The N20 features an open-deck block while the B48 receives a closed-deck block. Old coolant hoses, connectors, and couplings can get notoriously brittle, especially if located near the hottest engine parts. Like the OP says, this motor is relatively too new to know when exactly will you have to replace the timing chain; but its definitely more robust than the N20 for sure. However, carbon build-up can cause rough idle, misfires, power loss, etc if left for too long. Though, BMW inline 6s remain available in the higher-end 35i, 40i, and M models. Otherwise, the N20 is plagued by typical BMW issues. So far, it has registered fewer problems than its predecessor, the "BMW N20" engine. Read our post about N20 reliability here: Common BMW N20 Problems. Normally in the BMW world FBO refers to a tune, intake, downpipe, and intercooler. That's about it. How much PSI can the B48 stock turbo handle without ruining longevity? The recall is US only at the moment. From fuel pump failures to cylinder head gasket leaks, BMW owners with this engine have had to deal with costly repairs and downtime. BMW changed to a top mount air-to-water intercooler design. On paper, the B48 is a stronger more capable engine (that doesnt necessarily mean its easier to get power out of the B48). BMW B48 If youre looking for a standalone flash tune then the bootmod3 tune from ProTuningFreaks is an excellent option. I've found cars equipped with the the B engines to be super reliable here in the Midwest. Otherwise, scroll down and check out some more awesome B48 content. Anything over 20psi will not add much power. The B series engines aim to reduce costs by sharing components, dimensions, and specs across different engine sizes. 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). Yes, we believe the BMW B48 is a pretty reliable engine. We recommend switching to these spark plugs if youre pushing the limit of the B48 turbo or upgrade the turbo. This cookie is set by GDPR Cookie Consent plugin. According to the NHTSA, the 2020 BMW X3 has had 10 official recalls. Usually rough idle is due to an underlying problem or past due maintenance. Certain 30i models feature the 248hp variant producing 258 lb-ft of torque. Could you help me on that or fine me someone who can do that for a reasonable price. By clicking Accept, you consent to the use of ALL the cookies. B58 vs. S58 Horsepower & Torque. Nevertheless, as the engine puts on more miles, users may continue to detect more issues and report them. The B48 also has drop-forged cracked connecting rods. We wrote an article about the max boost the stock B48 turbo is capable of. We review the N55's performance and reliability. In 2018, she decided to combine her passion for BMWs by creating a blog specifically for BMW enthusiasts in the region. Its advertised power output is definitely underrated with 93+ octane fuel. No we dont agree with the lifetime coolant designation. B58 Engine Limits Simple Answer. Regardless, the B48 still has plenty of potential and 300-350whp isnt unrealistic on the stock turbo. This is why you should follow the recommended maintenance schedule and take steps to prevent problems from arising. I've just clocked over 35,000 miles and it is still smooth and fast. This cookie is set by GDPR Cookie Consent plugin. Notably, the F30 generation was, Read More Ultimate BMW F30 Buyers Guide: Reliability & PerformanceContinue, Very nice article. Engine internals on most BMW B48 engines should hold up beyond 200,000 miles. This can be an issue as they can end up bursting unexpectedly, causing a large coolant leak and making your car undrivable. Stage 1 E30 octane: 21%HP / 24%TQ Aftermarket testing shows numbers closer to 230-240whp. Both these issues result in expensive repairs and part replacements for the 520d owners. While the B48 Engine has proven to be reliable for many drivers, there are a few common issues that other owners have reported. Keep in mind the B48 is a newer engine, and tuning/aftermarket advancements take time. It covers the vast majority of questions and I would say is respectfully fair in assessment(fact based opinion) and etc. An upgraded version producing 302hp is found in new 35i models. Gasket oil leaks can be expensive repairs at the shop. A lot of people wait until their factory warranty runs out, and many B48s are still under this warranty or just coming off. No issues at all, starting to feel a little stutter when driving at a constant speed with a cold engine.. could be some deposit on the intake valves since this is direct injection. However, the N20 has its limits and they should be respected. Another note, the B48 is a part of BMWs modular B series engine objective. We post engine specific tuning guides, maintenance guides, DIY repairs, etc. Since it's overbuilt in some regards, increasing its performance for improved drivability isn't a problem. We know the older 2.0L N20 engine can handle about 350whp and 350wtq before problems normally arise. Those who often use the B48s power and boost will land on the shorter-end. "Passenger restraint system malfunction" BMW X3 Whats This? . At least in the US. Thanks a lot! Already a solid improvement over the 3.0L naturally aspirated N52 engine. The S58 engine, which was released in early 2019, is the high performance version of the B58. Toyota is also using the B48 engine in their Supra models. Explore Our Forums. N20 (low-compression 28i) Assuming a standard 15% drive-train loss the N20 is closer to 270 horsepower. 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. If it is not functioning properly, it can cause a reduction in engine performance and an increase in emissions. It requires a shop vac and walnut media shells. Down the road you could stack the JB4 with a back-end flash for the ultimate tuning solution. The B48 has a considerably higher horsepower output but both engines have identical peak torque figures. It seems to be a slight improvement over the preceding N52 engine. Stick with known, quality oils. A modest tune and bolt-ons should be very safe. Additionally, responsible for delivering the impressive power, the upgraded 302hp B48 receives a larger turbo. Yes, the BMW B48 engine is very reliable compared to similar BMW engines. Well, nothing is perfect. Or once a year whichever comes first. Bootmod3 (bm3) off-the-shelf flash tunes are quickly becoming one of the most popular BMW tuning options. That said, were likely writing this article too soon. Pressure test the cooling system to attempt to find the leak. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. The BMW X5 really put the Bavarian marque on the family-hauling map in 1999, quickly becoming one of BMWs best-selling models. Required fields are marked *. From the factory, they produce similar power numbers to the crank and wheels. In this section, well break down the above maintenance. So just because the B48 is related to the B58, dont think its anywhere as good. 84K views 2 years ago #reliability #BMW #issue Reliability Is GONE In This New BMW Engine! This article and page is such a joy to read. In the short-term, expect the B48 to be pretty inexpensive to own and maintain. Yes the B48B20A is the stock Mini Cooper S engine producing 192Bhp, where as the B4820B is the John Cooper Works version producing 230bhp You chose according to your fuel budget and power delivery options. The great news is the B48 is off to an excellent start from a reliability perspective. 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! Otherwise, the N20 and B48 are both relatively reliable engines. Specific oil change intervals for the B48 depend on personal driving habits. Tally how many spark plug wires are present. So the B47 engines suffer from timing failure also. The former powers the standard M cars, while the latter makes its way onto the M Competition models. Thats it. That is not at all a knock to the N20 or B48, but it is reality. At higher mileage, excess carbon build-up might lead to a rough idle. Theres no right answer, but in general the B58 should last as long as youre willing to continue repairs and standard maintenance. That said, we're likely writing this article too soon. A faulty ignition coil or a clogged fuel filter can cause this issue. B48 engines range from 181 to 302 horsepower in stock form. Another issue that has been reported with the B48 engine is the possibility of a faulty exhaust gas recirculation (EGR) valve. Its also in some Mini models along with the Toyota Supra. BMW 520d 2.0 Diesel Engine. We always recommend an upgraded intake as the first mod to make on the, Read More BMW B48 Upgraded Intake GuideContinue, This is a question that comes up often. . Its also not overly expensive, especially for those willing to DIY some maintenance. The NGK 97506 spark plugs are OE for the older N20 engine. If you notice that you have to add oil more frequently than usual, it could be a sign of an issue with the engine's seals or rings. Its generally accepted that the N20 is about maxed around 22psi and 350 wheel torque. do you think that is true and why is that? If it fails, the engine might run poorly or even stall. I will take a picture soon! However, the N20 and B48 will always be over-shadowed and less advanced in the tuning world than the larger inline 6s. Unfortunately, the N20 isnt as stout. Bimmerly is a hub for BMW enthusiasts. Although, we expect the B48 will eventually suffer similar common problems as the N20, less the timing chain. These engines perform great and have very good fuel economy. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. Source: . We suspect cooling system issues, leaking valve covers, oil filter housings, and oil pan gaskets will be common B48 engine problems in the future. However, compression also increases on the B48 which isnt the greatest for strength on boosted engines. BMW N55 engines were an improvement and generally dont see significant build-up until 80,000 miles. The redesigned, third-generation X3 picks up and improves upon where the previous version left off, keeping its title as one of the best-driving compact SUVs. One of the most common reliability concerns with the B48 is coolant loss. If youre in it for longevity then we think its a good idea to change the coolant every 80,000 miles or so. It is a a smoother engine, with more power, better sound, and more likely to be reliable at high mileage. The B48 is a 2L turbocharged inline-4 petrol engine from the BMW B-series modular engines; depending on the version, it generates 154-302 horsepower and 250-450 nm torque. How much PSI can the B48 stock turbo handle without ruining longevity? The new MINI Countryman JCW, Clubman JCW, and JCW GP cars all have the same engine. I've replaced a couple of water pumps but have yet to see one leak oil. 2) Can the BMW B48 engine be repaired or does it need to be replaced? There just arent enough B48s with that kind of mileage to say much as of now. Tune only cars are able to push over 260 wheel horsepower and 290 wheel torque. Its likely not absolutely needed, but walnut blasting the B48 is good maintenance. Most of the time it is piston nr.2 Its a single turbo. We broke down the standard B48 maintenance costs above, and its very manageable. Ive only covered 30k and its a 2017 model. 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. Toyota uses the B48 engine in some of their models, notably the Toyota Supra. We recommend changing the oil every 5,000-7,000 miles. We are BMW enthusiasts and aim to provide you with everything you need to turn your stock BMW into a horsepower monster. Required fields are marked *. Some of these examples are engines that have not been maintained with regular oil changes. However, coolant helps lower the freezing point and increase the boiling point. It was a big deal. Nowack (SAE SN) test a bit lower with higher viscosity oil. These B48s have a lot to live up to. This is a decent increase over the lower 10.2 compression ratio on the BMW N20 engine. [2] Its built on the same basic design as the 6-cylinder B58 with two less cylinders. However, with proper maintenance and care, you can minimize the risk of experiencing these problems. The only thing they have in common is that they are both 2L turbos. Recommended Communities. 4. This is usually associated with a difficult-to-spot coolant leak. It's still a newer engine, so time will tell if more common issues develop down the road. Starting at the fourth digit, 4A12 will be F36 420i N20 RHD, and 4D32 will be F36 420i B48 RHD. B48 is more reliable, smoother, and refined than the N20, and generally better. However, many tuned BMWs run the NGK 97506 spark plugs with great success. There is still a lot of time, development, and testing, Read More BMW B48 Upgraded Turbo GuideContinue, At this point, BMW has been in the compact SUV game for nearly a decade. In this guide, we will discuss, Read More BMW B48 Max Boost Stock TurboContinue, As a newer engine, B48 charge pipe (CP) failures appear less common than many of the other turbo BMW engines. 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.