bmw b48 reliability

Again, the B48 engine should be an even further improvement. The BMW N20 and B48 have big reputations to live up to. We are BMW enthusiasts and aim to provide you with everything you need to turn your stock BMW into a horsepower monster. A different exhaust manifold uses six ports instead of six into two and revised pistons change the compression ratio from 11:1 to 10.2:1. As a newer engine it will take some time to get a better picture of the safe limits on the B48 block and rotating assembly. 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. Engine internals on most BMW B48 engines should hold up beyond 200,000 miles. Our garage currently includes a 2008 135i, 2007 335i, and 2008 535i. 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 BMW B48 engine reliability is still up for debate, but all signs point to an excellent BMW engine. "Passenger restraint system malfunction" BMW X3 Whats This? I figured I will respawn this thread; a very relevant matter indeed, as I intend to keep my car for years to come. Content on bimmerfest.com is generated by its users. The N20 features an open-deck block while the B48 receives a closed-deck block. 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. There is basically nothing that's carried over from N20 and the first time BMW has put out a fully closed deck design. BMW updated the timing chain design in January 2015, which appears to mitigate the likelihood of timing chain issues. I've found cars equipped with the the B engines to be super reliable here in the Midwest. What are your thoughts and experiences with the N20 and/or B48? If youre over 100,000 miles on your B48-powered BMW, a walnut blast is recommended. Some of it simply comes down to the luck of the draw, maintenance, etc. Currently 83k miles on a 300hp B48. This cookie is set by GDPR Cookie Consent plugin. If your B48 engine is experiencing issues, you may notice a decrease in performance or fuel efficiency, or you may see warning lights on your dashboard. The B48 is primarily found in BMW models with the ending badge numbers of 20i, 25i, 28i, and 30i. Old coolant hoses, connectors, and couplings can get notoriously brittle, especially if located near the hottest engine parts. Most B48 models are limited to around 130mph or 155mph. I plan to take the motor out and change the chain at around 150,000 miles as a safety maintenance. Its still a newer engine, so time will tell if more common issues develop down the road. However, the higher horsepower B48 in BMW 35i models sees a drop to 9.5:1 compression. One common issue with the B48 engine is a rough idle. The reliability rating on a BMW 3 series is pretty average, but it does increase as you step up in the model range. See here for data: BMW N20 / B48 Quarter Mile Rankings, https://www.facebook.com/groups/244324833434651. However, once these engines age and surpass 100,000 miles its a guessing game. BMW does consider B48 engine coolant to be a lifetime fluid. The 330e has the B48B20B and the 530e has the B48B20A. No issues with my 2018 B46. The most important aspect is sticking with a quality, trusted tune. We are hoping to soon add an F80 M3 and F82 M4 GTS. 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. Yes, the B48 crank and connecting rods are forged as with the larger B58 6-cylinder. 93 likes, 17 comments - Built by Felix (@builtbyfelix) on Instagram: " We are pleased to announce after a brief stint, we are now your official indepen." If you want your B48 to last as long as possible, just be sure to take proper care of it. Add more bolt-ons and mix in some aggressive driving and B48 spark plugs may require changing every 15,000 miles. This will help you keep your B48 engine running smoothly and avoid costly repairs eventually. Peak power gains may appear underwhelming for the cost of an upgraded FMIC. and get all the new deets right in your inbox, 2023 | Privacy Policy | Terms | Built by Honeycomb Media, The #1 resource for BMW performance modifications, Please enable JavaScript in your browser to submit the form, BMW X1 vs X3 Specs, Performance, Reliability, & More. Its reliable, efficient, and sporty. Dmitry has been an editor and author at Cararac.com since 2015. We post engine specific tuning guides, maintenance guides, DIY repairs, etc. This engine is in my Mini Cooper S. The one common theme I am hearing is change the oil at 3000 to 5000 miles. Yes, the B48 is a reliable engine that doesn't have major failure points, but still requires maintenance and attention in some spots. Its like comparing an infiniti q60 non-redsport to a Q60 redsport variantthe non redsport (cheaper model with 100 less hp) will gain over 100 whp from a tune alone, where the redsport gains 30-50 whp at best. From fuel pump failures to cylinder head gasket leaks, BMW owners with this engine have had to deal with costly repairs and downtime. Bringing the BMW community together. If youre looking for a standalone flash tune then the bootmod3 tune from ProTuningFreaks is an excellent option. Theyre valid questions, however there is no perfect answer. Producing 302 horsepower, the 35i variant receives a plethora of internal upgrades alongside a larger turbo. Keep up the good work!!! This website uses cookies to improve your experience while you navigate through the website. The Fora platform includes forum software by XenForo. Though, these issues usually dont pop up until 80,000 100,000+ miles. Following the N20, BMWs B48 packs a solid punch for a 2.0L inline 4. So the B47 engines suffer from timing failure also. 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. Necessary cookies are absolutely essential for the website to function properly. Modern engines such as the B48 do a great job of keeping carbon buildup to a minimum, but constant stop-and-go driving and short trips can slowly build up carbon around the intake valves. The BMW B46 and B48 are basically the same engine. Regardless, in this post we will lay it out as clearly as possible. To do timing chain on the B48 the transmission will need to come off. Engine limits are always a tough topic. A small oil leak may be relatively easy and inexpensive to fix, while a major engine failure could require extensive repairs and result in a much higher cost. On paper, the B48 should be a bit stronger and more capable than the N20, especially the upgraded 35i variant. Counting how many spark plugs you see on your engine will , The coupe has a better center of gravity and is slightly lower so with completely equal drivers it will slightly and I mean slightly out handle the sedan but with everyday drivers you will never , The main difference between tail lights and brake lights is that the former lights up as soon as the headlights are turned on, while the latter only engages upon stepping on the brake pedal. Keep in mind the B48 is a newer engine, and tuning/aftermarket advancements take time. 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. Carbon buildup is a common issue that can affect any engine with direct injection such as the B48. These are pretty common issues among almost all BMWs. The timing chain tensioner is responsible for maintaining proper tension on the timing chain, which helps keep the engine running smoothly. Yes, we believe the BMW B48 is a pretty reliable engine. 3. 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 limits of the B48 are still rather unknown. Its a fairly simple fix and is covered under warranty. Of course, theres always risk in increasing power, torque, and boost. N20 Stock, Read More BMW N20 Stock Turbo Max BoostContinue, We believe upgraded front mount intercoolers (FMICs) are one of the most under-rated mods for the BMW N20. Direct injection (DI) engines come with one flaw, which is carbon build-up on intake valves. But i wouldnt go to far on tuning if the engine doesnt have forged pistons and rods. Yes, we believe the BMW B48 is a pretty reliable engine. 2) Can the BMW B48 engine be repaired or does it need to be replaced? 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. My guess is that the G20 will prove to be very reliable too. Not too bad for a 2.0L engine. Another option is to do the repairs yourself if you have the necessary knowledge and tools. 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. Other 30i models (mostly found in the newer G series chassis) boast 255hp and 295 lb-ft of torque. You can also tell from the VIN without even doing a lookup. Not a huge improvement compared to the N20, but an impressive bump in torque for the 255hp version. Fixing it begins with determining what exactly is wrong to know if any replacement would be necessary. Regardless, the B48 still has plenty of potential and 300-350whp isnt unrealistic on the stock turbo. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. Turbo + pump + intake + downpipe + plugs and youre making big power. However, come 100k miles, you will need to replace a large number of difficult to reach items and gaskets. Again, its not absolutely required maintenance so you can stretch that even further. 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. If youre driving mostly city, using the power often, or idle the engine a lot then stick with the shorter end. Thats it. Toyota is also using the B48 engine in their Supra models. This is a tough one. This recall applies to the hybrid models . Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors. Some claim it's reliable by "BMW standards" but we believe the B58 delivers good reliability by any standard. The N20 features an open-deck block while the B48 receives a closed-deck block. 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. Yes I've been waiting and Injen finally came out with it recently! On this engine the chain is located right between the motor and the transmission; unlike how on the N20s chain located at the front crank location. This cookie is set by GDPR Cookie Consent plugin. The B48 is also a seemingly reliable engine thus far. Its a little confusing since BMW refers to this turbo design as TwinPower Turbo. If you do long highway drives often then you can get away with the higher 8,000 or even 10,000 mile OCI. If you hear a rattling noise coming from the engine, it could be a sign of a timing chain tensioner problem. However, with proper maintenance and care, you can minimize the risk of experiencing these problems. Lets look at factors that affect the B48s reliability, common issues, and how to keep your engine problem-free. Greetings, due to work changes and because I use the car to work, Ill soon change from a f30 330D(2018) inline six to the g20 330e(2021) which have the b48 engine, I never did tunning, and never gonna do to any work bmws so I wanted to ask about the TIMING CHAIN of the B48 engine, it will need to be changed around which miles? We know the older 2.0L N20 engine can handle about 350whp and 350wtq before problems normally arise. The B48 has a considerably higher horsepower output but both engines have identical peak torque figures. Required fields are marked *. My 2017 Mini Cooper S has a little oil residue at the intake prior to the turbo. We recommend a 50/50 water and coolant mix for the BMW B48. The lines might be long and itll be a wait and see for codes. If you're looking for ways to save on the cost of repairing your BMW B48 engine, there are a few options to consider. These shells help clean off carbon deposits without damaging the valves or ports. Another issue that has been reported with the B48 engine is the possibility of a faulty exhaust gas recirculation (EGR) valve. As with the N20, the B48 comes slightly underrated from the factory. Now, with the exception of the M35i models, all of the turbo 4-cylinders are the SULEV spec. Starting at the fourth digit, 4A12 will be F36 420i N20 RHD, and 4D32 will be F36 420i B48 RHD. The B48 is without any serious common problems to date. Or once a year whichever comes first. These small 2.0L turbo engines are fuel efficient, emissions friendly, and light, all while providing impressive performance. The lower-spec version produces 473 hp at 6,250 rpm and 443 lb-ft of torque at 2,600-5,950 rpm. Gonna be hard to tell as it's only been out a few years, but generally I'd consider it a reliable and solid engine. Read our post about B48 mods here: BMW B48 300whp. (I don't own one, but from what I've heard). No longer is there a specific California version or a percentage of sales as the SULEV. They did tweak the design a little bit, but its still a testament to the reliability of the B48. 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! B48 Dinan Dyno: 254 hp, N20 BMS Dyno: 233.7 hp Whether or not these upgrades are worth it on the B46/B48 is up for debate. 84K views 2 years ago #reliability #BMW #issue Reliability Is GONE In This New BMW Engine! The reference to the B58 is in regards to engine strength with their closed deck blocks. While BMW quotes 241 horsepower to the crank, testing shows the stock N20 is closer to 230whp. Anyways, B48 maintenance isnt horrible as shown above. Check out our B48 downpipe upgrade guide for more. You can say we are somewhat N54 fanatics. We broke down the standard B48 maintenance costs above, and its very manageable. Both the N20 and B48 pack small 2.0L turbo engines that produce impressive power for their size. Generally, higher compression is not great for boosted engines. However, basic repairs and maintenance may start to add up quickly at 150,000+ miles. It also offers 20% more boost pressure and an increased compression ratio of 11.0:1. The B48 top mount air-to-water intercooler uses a front mount heat exchanger to cool charge air temps. The JB4 is the most advanced and highly featured tuning system available for your B38/B46/B48 MINI. The B58 in question wasnt just re-tuned, the hardwares been changed. You hear it on a cold start and then when it reaches normal temperature. 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. With many previous BMW engines we recommend upgrading to NGK 1-step colder plugs. Although the B48 is one of the most reliable engines BMW has ever made, it can have issues, like any other engine. At least when you compare the B48 and B58 reliability to that of the earlier N54, N55, N63, S65, etc. Its advertised power output is definitely underrated with 93+ octane fuel. The cookies is used to store the user consent for the cookies in the category "Necessary". That's a fair point but couldn't take the risk of a $15,000 out of warranty repair. Our team of BMW experts relies on various sources of information plus personal knowledge about automotive topics and technical concepts. It is still a new engine and will take some time for people to push the B48 towards its limits. N20 (low-compression 28i) It also helps prevent corrosion. Sir, thats an amazing article. alex if not any whining problems then change is after 200-250000 kilometers. It still has a bicycle chain. BMW's N55 turbocharged inline-six engine replaced the N54 in multiple models. It is likely best to keep boost around 22psi peak. Personally, I think B48 is better than N20. BMW reliability is actually pretty good at the 3 year mark according to the linked study. 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. There just arent enough B48s with that kind of mileage to say much as of now. Nonetheless, well lay it out as straight forward as possible. Based on the B58. BMWs B48 engine is also the successor to the 2.0L turbo N20 engine. We are hoping to soon add an F80 M3 and F82 M4 GTS. However, the N20 has its limits and they should be respected. What do you think of the ER charge pipe? Our garage currently includes a 2008 135i, 2007 335i, and 2008 535i. B58 Engine Limits Simple Answer. Plus, the N52 doesn't suffer from the E90 M3's rod-bearing issue. Why? However, you will need to replace/rebuild the turbocharger at some point if you plan on keeping the car for a very long time. It does not store any personal data. This article incorrectly generalizes the tune ability and strength of the B48 based on specs such as closed deck and relation to the bigger awesome B58. B58 vs. S58 Horsepower & Torque. No, completely different design. Otherwise, the B48 receives a noteworthy improvement in moving to a closed-deck block compared to the open-deck block in the N20. Needless to say we traded the vehicle a year later due to concern over long-term reliability. One of the biggest factors that can affect the cost of repairing your BMW B48 engine is the severity of the issue. Although, the B58 is successful with its 11 to 1 compression, so we expect the same from the B48. Although, we expect the B48 will eventually suffer similar common problems as the N20, less the timing chain. The B48 is already proven as underrated from the factory making 220+whp and 240+wtq stock. However, the Champion spark plugs hold up very well for a stock turbo B48. Their B48 tunes also offer a good selection of OTS flash maps loaded with great features. Thanks a lot! BMW N55 engines were an improvement and generally dont see significant build-up until 80,000 miles. N20, N26, B46, B48 Turbo Engine / Drivetrain / Exhaust Modifications. 1) Is the BMW B48 engine prone to issues? Its working for the B58, though. Leave a comment and let us know! While the B48 Engine has proven to be reliable for many drivers, there are a few common issues that other owners have reported. A modest tune and bolt-ons should be very safe. We recommend changing the oil every 5,000-7,000 miles. I have a 2014, 535i N55 engine. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". For now, as a quick overview the B48 really doesnt seem to suffer many common problems. You also have the option to opt-out of these cookies. Some of these examples are engines that have not been maintained with regular oil changes. Its still early in the world of tuning the B48. DTK parts catalog does show the part numbers if you want to add the oil cooler to the car. We recommend changing the B48 oil every 5,000 to 8,000 miles. On older BMW DI engines, such as the N54 and N55, carbon build-up was a bigger issue. If left unchecked, the engine could run low on coolant. The more aggressive the tune and boost the bigger gains youll see. your BM3 estimated gain chart is incorrect, that is for the 35i B48 model that is already currently upgraded (tuned) to 302 hp. Is a brake light and running light the same? Its truly an excellent engine for its size. Throw a few bolt-ons and some E85 in the mix and youve got an engine capable of pushing upwards of 300whp. Yes, we believe the BMW B48 is a pretty reliable engine. Overall, it is a reliable engine with a low maintenance cost. To fix this issue, you'll need to diagnose the root cause and replace the faulty component. As you can see, from very early on the B58 has big gains over the N55 which it holds right through the rev range. Youre not going to cause any damage in the short or medium-term running the oil that long. BMW uses plastic for many of these connectors on the B48, which tend to contract and expand and thus can crack, break, and cause a leak. I live in the Bay Area, CA. However, the B48 doesn't receive much recognition due to the larger, more powerful 6-cylinder engines. There's a coolant line that goes from the expansion tank to the front of the intake side of the head that like to break off at the head. The B48 uses a single twin-scroll turbo. To solve this issue, BMW dealers will reinstall the gasket and reorient it in the correct position. Assuming a standard 15% drive-train loss the N20 is closer to 270 horsepower. The engine is being included in the also new bmw x1. That is not to say either engine is unreliable. What is the max boost the N20 stock turbo can handle? Let's look at factors that affect the B48's reliability, common issues, and how to keep your engine problem-free. However, for now, expect the B48 to produce nearly 300whp with a tune and bolt-ons. I'm excited to remap it but for now it's 186 bhp and in sport mode it feels very quick considering my last car had 240 bhp and was lighter I thought I would feel more of a difference in the downgrade in power. The BMW B58 engine can handle around 600-650whp and 550-600wtq on the stock block and internals. Indeed, the BMW B48 engine has its fair share of issues. BMW reliability seems to be trending in the right direction, though. Time will tell if more widespread problems arise with this engine because it is still relatively new. At least in the US. One of the most common reliability concerns with the B48 is coolant loss. The only thing they have in common is that they are both 2L turbos. Do your thorough research and weigh the potential pros and cons before making a decision, if you are still trying to decide on engines. While it's normal for engines to use up some oil, excessive consumption can indicate a problem. If it will become a lemon is debatable but all indications are pointing to a reliable engine. This is a decent increase over the lower 10.2 compression ratio on the BMW N20 engine. Despite the initial prejudice against the N20, everyday buyers and .

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