Torque ranges from 214 to 332 lb-ft. Of course, all power variants of the B48 respond well to tuning and bolt-on mods. The cookie is used to store the user consent for the cookies in the category "Other. https://static.nhtsa.gov/odi/tsbs/2012788-9999.pdf That said, were likely writing this article too soon. I will dyno it before mapping as it feels more like 200 bhp but I've been quoted 260 on the remap. I think the most important part is that you get the downpipe with the right bottom clamp. Now, with the exception of the M35i models, all of the turbo 4-cylinders are the SULEV spec. Fixing it begins with determining what exactly is wrong to know if any replacement would be necessary. While it's normal for engines to use up some oil, excessive consumption can indicate a problem. Specific oil change intervals for the B48 depend on personal driving habits. In the short-term, expect the B48 to be pretty inexpensive to own and maintain. This and a good wastegate are what Im keeping an eye on. Again, the B48 engine should be an even further improvement. Weve seen dynos showing nearly 400whp. Its advertised power output is definitely underrated with 93+ octane fuel. Im putting one in one the left behind the bumper under the headlight. 1. She has had the car since new and it now has around 70k km on. Necessary cookies are absolutely essential for the website to function properly. However, the B48 doesn't receive much recognition due to the larger, more powerful 6-cylinder engines. 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. Installed bootmod3 stage 1 93 on it this weekend. Another note, the B48 is a part of BMWs modular B series engine objective. So just because the B48 is related to the B58, dont think its anywhere as good. The B48 has a split cooling system with two water pumps. 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. 2. The internals of the B48 is able to last 200,000 miles and beyond, but that is only possible with thorough and timely maintenance. Stage 2 91 octane: up to 16% HP / 28% TQ If youre over 100,000 miles on your B48-powered BMW, a walnut blast is recommended. By / may 31, 2022 may 31, 2022 although the n20 is a reliable engine overall , the earlier models are plagued with timing. My n20 120i 2016 is w that same noise Is that normal? On the other hand, the B47 generates 187 horsepower and 295 lb-ft of torque. 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. BMW B48 rods are formed in one piece before the rod eye is cracked in two. However, come 100k miles, you will need to replace a large number of difficult to reach items and gaskets. thanks so much for the write up. Required fields are marked *. Time will tell if more widespread problems arise with this engine because it is still relatively new. It's also a good idea to check your spark plugs and fuel injectors regularly to ensure they're functioning properly. Thanks to the modularity of the designs, the very same forged piston rods that go into the B58 are also . Were big fans of VRSF products, and believe they offer the best catless downpipe for the BMW B48. One common issue with the B48 engine is a rough idle. For now, the B48 seems to be free of any common problems. Thanks a lot! 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. . Previous Thread | Next Thread Posting Rules You may not post new threads B-series engines have been designed to be modular. Most 30i models come in at 252-258 horsepower. If youre driving mostly city, using the power often, or idle the engine a lot then stick with the shorter end. Since fuel is sprayed directly into the cylinder theres no fuel flowing through the intake ports. This engine is in my Mini Cooper S. The one common theme I am hearing is change the oil at 3000 to 5000 miles. No issues with my 2018 B46. We wrote an article about the max boost the stock B48 turbo is capable of. I would say on the 11:0 compression version 300hp is about the max on stock internals. In this guide, we will discuss the top 5 most reliable BMW engines ever. One main belt-driven water pump and a secondary electric water pump help cool the turbos down after the engine shuts off. Turbo engines love to burn through spark plugs. Some B48 and B58 owners even go for thicker 0W-40 and 5W-40 oils. If you've got the cooling system open for any reason it's worth replacing preemptively. But recent BMWs seem to be getting notorious for minor issues, increasing concerns about reliability. A fairly common issue on early-production BMW B48s issue is a turbo return line leak. 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. Toyota uses the B48 engine in some of their models, notably the Toyota Supra. 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. Regardless, the B48 still has plenty of potential and 300-350whp isnt unrealistic on the stock turbo. Right now, we expect the B48 will earn a better reputation for strength and durability vs the N20. Its working for the B58, though. 16K miles. I plan to take the motor out and change the chain at around 150,000 miles as a safety maintenance. Additionally, the cost of labor and parts will also play a role in the overall repair cost. 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. This was an N20 powered car and within a week a thread was posted here about the N20s eating themselves and grenading. Were out of things to say regarding B48 reliability, which is a good thing. The limits of the B48 are still rather unknown. This is a tough one. That said, we're likely writing this article too soon. 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. Turbo + pump + intake + downpipe + plugs and youre making big power. The B series engines aim to reduce costs by sharing components, dimensions, and specs across different engine sizes. You should first look at the basic info about an engine platform, then write something somebody might read this and get the wrong picture. There is basically nothing that's carried over from N20 and the first time BMW has put out a fully closed deck design. It receives a stronger crankshaft, bearings, and pistons while dropping the compression ratio to 9.5:1. However, the B48 doesnt receive much recognition due to the larger, more powerful 6-cylinder engines. I've replaced a couple of water pumps but have yet to see one leak oil. This cookie is set by GDPR Cookie Consent plugin. While the B48 Engine has proven to be reliable for many drivers, there are a few common issues that other owners have reported. BMW's B48 engine is also the successor to the 2.0L turbo N20 engine. Notably, the F30 generation was, Read More Ultimate BMW F30 Buyers Guide: Reliability & PerformanceContinue, Very nice article. Some even run 70-80% for canyon or track driving as the water will help cooling. Our goal is to provide you with accurate information about BMW cars, engines, and up-to-date tuning guides. The B48 engine, which is in many BMW cars, appears to have a few reliability issues th BMW. We suspect some normal BMW problems to pop up like the cooling system, rubber gaskets, etc. Stick with known, quality oils. The B47 has proven to be reliable so far in my mothers 320d. What BMW's use the B48 Engine? A faulty ignition coil or a clogged fuel filter can cause this issue. We recommend changing the B48 oil every 5,000 to 8,000 miles. As such, we will not discuss chassis or other non-engine maintenance stuff like brakes, tires, etc. Some B48 owners have also noticed that their engines consume oil at an alarming rate. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. Like any engine, the BMW B48 engine can experience issues. Both can make over 300whp with tunes and basic bolt-ons. The 330e has the B48B20B and the 530e has the B48B20A. Those who often use the B48s power and boost will land on the shorter-end. Yes, we believe the BMW B48 is a pretty reliable engine. I figured I will respawn this thread; a very relevant matter indeed, as I intend to keep my car for years to come. BMW B48 Engine Specs and Reliability. If your PCV system doesnt work then yes you can add a catch can. As you can see, from very early on the B58 has big gains over the N55 which it holds right through the rev range. Also I want to discuss the basic tuning without putting a lot of stress on the engine reduce the reliability. Loving it. On paper, the B48 is a stronger more capable engine (that doesnt necessarily mean its easier to get power out of the B48). The B48 will still advance some especially as more and more start to come out of warranty. A higher output version of the B48 is in some 2019+ 35i models. 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. For a better experience, please enable JavaScript in your browser before proceeding. Thats it. B46s meet SULEV emissions standards and are the primary engines in the US market. The JB4 is the most advanced and highly featured tuning system available for your B38/B46/B48 MINI. And this leads to the ever-recurring question: is the BMW B48 engine reliable? 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. B48 BMS Dyno: 230.68 hp, BM3 on N20 It is also worth mentioning that BMW has made efforts to address these issues through recalls and updates to the engine design. These are pretty common issues among almost all BMWs. Can , In V6 or V8 engines, the spark plug wires are on both sides of the engine. Expect standard maintenance to be a bit pricier than average if youre coming from a naturally aspirated or non-BMW engine. But opting out of some of these cookies may affect your browsing experience. These include cooling system issues and leaking valve cover gaskets, oil pan gaskets, and oil filter housing gaskets. Again, were looking at just the engine here and ignoring the chassis, electronics, etc. The cookies is used to store the user consent for the cookies in the category "Necessary". Stage 1 E30 octane: up to 20% HP / 28% TQ It seems to be a slight improvement over the preceding N52 engine. Its not too bad on a stock engine, however spark plug life can decline rapidly when tuned. While BMW quotes 241 horsepower to the crank, testing shows the stock N20 is closer to 230whp. Early models are becoming well priced due to their age and the release of the new generation 3 series. However, if the damage is severe, it may need to be replaced. BMW N20 Common Engine Problems Although the N20 is a reliable engine overall, the earlier models are plagued with timing chain issues that may be costly to fix. Point is standard maintenance isnt the cheapest. ago. 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. 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. The N54 sees carbon build-up as often as every 40,000 to 60,000 miles. However, its usually the rods or pistons that let go first. The success of the X5 led to the expansion of the BMW X model line, beginning with the introduction, Read More BMW X1 vs X3 Specs, Performance, Reliability, & MoreContinue, What ive seen is that the B48 is having issues with piston failure. BMW's N55 turbocharged inline-six engine replaced the N54 in multiple models. The B48 has a considerably higher horsepower output but both engines have identical peak torque figures. Quality LL01 or LL14+ oils can also be more expensive than your average engine oil. Yes, the B48 is a reliable engine that doesnt have major failure points, but still requires maintenance and attention in some spots. 84K views 2 years ago #reliability #BMW #issue Reliability Is GONE In This New BMW Engine! The same can be said about turbo engines in general. In most cases, you can repair a faulty BMW B48 engine. That is not to say either engine is unreliable. Could you help me on that or fine me someone who can do that for a reasonable price. So far, it has registered fewer problems than its predecessor, the "BMW N20" engine. We suspect cooling system issues, leaking valve covers, oil filter housings, and oil pan gaskets will be common B48 engine problems in the future. 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. If you do long highway drives often then you can get away with the higher 8,000 or even 10,000 mile OCI. However, we think a 10,000 mile OCI is too long for longevity. A lot of people wait until their factory warranty runs out, and many B48s are still under this warranty or just coming off. The most powerful version, found in 28i models, makes 241hp and 258tq. Normally in the BMW world FBO refers to a tune, intake, downpipe, and intercooler. Yes, the BMW B48 engine is very reliable compared to similar BMW engines. BMW N20 Engine Reliability, Known Issues, and More. Save my name, email, and website in this browser for the next time I comment. A tune and bolt-ons will likely push B48 powered BMWs into the 165-175mph ballpark. BMW M20 Engine. My 2017 Mini Cooper S has a little oil residue at the intake prior to the turbo. BMW reliability is actually pretty good at the 3 year mark according to the linked study. 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. There just arent enough B48s with that kind of mileage to say much as of now. The B48 also has drop-forged cracked connecting rods. DTK parts catalog does show the part numbers if you want to add the oil cooler to the car. In this guide, we will discuss, Read More BMW B48 Max Boost Stock TurboContinue, The B48 in 20i and 30i models is looking to be an excellent engine thus far. Mini Cooper S Mods Summary Although, we expect the B48 will eventually suffer similar common problems as the N20, less the timing chain. This is a decent increase over the lower 10.2 compression ratio on the BMW N20 engine. ~300-350whp. It covers the vast majority of questions and I would say is respectfully fair in assessment(fact based opinion) and etc. The cause of coolant loss is usually a failing coolant hose or coupling that is letting small amounts of coolant escape. The B48 is part of a modular BMW engine family of 3-cylinder ( B38 / B37 ), 4-cylinder (B48/ B47) and 6-cylinder ( B58) engines, [1] which use a displacement of 500 cc (30.5 cu in) per cylinder. Well, nothing is perfect. Otherwise, the N20 is plagued by typical BMW issues. Nevertheless, as the engine puts on more miles, users may continue to detect more issues and report them. If it will become a lemon is debatable but all indications are pointing to a reliable engine. Keep up the good work!!! We've already detailed one reliable BMW engine, the N52 inline-6 found in the E90 325i, 328i, and 330i. **Please let us know if we missed anything in this B48 FAQ guide, or if there is anything youd like to see more info on. 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. Again, its not absolutely required maintenance so you can stretch that even further. From the common issues you can expect to encounter with the engine to potential fixes and tips to maintain your BMW B48 engine,this article will answer questions you may have and beyond. Many owners complained about the B48 losing coolant even though no obvious leaks are visible (ghost leaks). We are hoping to soon add an F80 M3 and F82 M4 GTS. Ive only covered 30k and its a 2017 model. JavaScript is disabled. B58 vs. S58 Horsepower & Torque. As weve already mentioned throughout, the N20 and B48 are impressive performance engines for their size. I had the 2020 330e and I am currently having the 2021 530e. Stage 2 93 octane: 22%HP / 25%TQ Come join the discussion about Bimmerfest events, production numbers, programming, performance, modifications, classifieds, troubleshooting, maintenance, and more! As such, the limits of the B48 might fall in the same ballpark. BMW reliability seems to be trending in the right direction, though. bimmerfest.com is an independent BMW enthusiast website owned and operated by VerticalScope Inc. Most B48 models are limited to around 130mph or 155mph. The great news is the B48 is off to an excellent start from a reliability perspective. Two of our N54s are nearing 120,000 miles on original VANOS components. carolinasbmwmoa.org quickly gained a following, and Carolina now leads a team of contributors who share their experiences and knowledge about BMWs. Of course, being a new engine, BMW had to bump the B48 output compared to the N20. However, we believe it is a step in the right direction. We believe a couple of the best B48 tunes to start with include: These two tunes are the most common off-the-shelf (OTS) options for the B48 engine. B48 feels more refined, but when I put the pedal to the metal, it took a little longer for turbo to spool up and the car to actually go compared to my N20. Design [ edit] Compared with its N20 predecessor, the B48 uses a more undersquare design, and engine block in "closed-deck construction". My wife and I purchased an X3 back in Feb 2016. The B48 OE Champion spark plugs are highly effective on most stock turbo engines. I am considering a oil catch can (not sure where I will find room to place it). Those looking to push 350+whp are definitely best suited to the larger, more capable engines. BMW recommends oil changes every 10,000 miles. But note that not all B48 engines have experienced these problems and many owners have had no issues at all with their engines. Time will tell what may arise in the future. However, engine strength is the big question. This will help you keep your B48 engine running smoothly and avoid costly repairs eventually. Its a single turbo. BMW B48 Their B48 tunes also offer a good selection of OTS flash maps loaded with great features. Generally, higher compression is not great for boosted engines. Though the bump in compression to 11 to 1 is questionable. Nonetheless, well lay it out as straight forward as possible. I don't think the X5s can come with a 4 cylinder? By clicking Accept, you consent to the use of ALL the cookies. Still a very quick car to me personally and hasn't skipped a beat. The BMW B48 engine reliability is still up for debate, but all signs point to an excellent BMW engine. Not too expensive, but they can add up over time. For B48 you meant? 20i models generally receive the lower output B48 engines. Although the B48 is one of the most reliable engines BMW has ever made, it can have issues, like any other engine. At higher mileage, excess carbon build-up might lead to a rough idle. Bootmod3 (bm3) off-the-shelf flash tunes are quickly becoming one of the most popular BMW tuning options. 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. On paper, the B48 should be a bit stronger and more capable than the N20, especially the upgraded 35i variant. Its still a newer engine, so time will tell if more common issues develop down the road. Oil changes are important on these if you want max reliability. I've got a b48 engine 320i and thus far it's been faultless. 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 B48 BM3 Tuning Guide Info & Horsepower Gains, BMW X1 vs X3 Specs, Performance, Reliability, & More, BMW B46/B48 Intercooler & Heat Exchanger Guide, Ultimate BMW F30 Buyers Guide: Reliability & Performance. Certain 30i models feature the 248hp variant producing 258 lb-ft of torque. Be wary of white smoke coming out of the exhaust as this could indicate that the car is burning coolant. Weve always run Liqui Moly oils on our BMWs with great success. Explore Our Forums. I have a 2017 440i with the B58, and my girlfriend's mom has a 2018 X1 with the B48. I am about to buy a 2016 320i M sport with a stage 1 tune currently pushing out about 260hp and this article was very reassuring. While torque is identical on the top-spec iteration, peak power is bumped up to 503 hp at 6,250 RPM. Your email address will not be published. Though, BMW inline 6s remain available in the higher-end 35i, 40i, and M models. Expect both the N20 and B48 to be reliable engines. The resulting damage is also similar: the timing chain can stretch or snap causing damage to the rocker arms, cam carrier, guides & valves. It is certain that the B48 puts BMW ahead in the turbocharged 4-cylinder engine world. 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 this engine features improved features like a tougher crankshaft and modified pistons, it's not without shortcomings. B58, if It has a higher potential overall then it'll be more reliable with only light modification. Lets look at factors that affect the B48s reliability, common issues, and how to keep your engine problem-free. Some of it simply comes down to the luck of the draw, maintenance, etc. B48 Dinan Dyno: 254 hp, N20 BMS Dyno: 233.7 hp Given all the valve stem issues with these motors, you would have thought that BMW would have left it on the '04 and '05 model year engine. It couldn't be more different than the N20. How much HP can a B48 handle? Attention in some spots, expect the B48 is a rough idle browsing experience and B58 owners even for... Are the primary engines in general seems to be reliable so far, it may need to a. Change the chain at around 150,000 miles as a safety maintenance think 10,000... Your spark plugs are highly effective on most stock turbo, makes 241hp 258tq! More widespread problems arise with this engine is very reliable compared to similar BMW engines the exception of the to... Bumper under the headlight bmw b48 reliability return line leak reliability & PerformanceContinue, very article... Some even run 70-80 % for canyon or track driving as the water will help you your... Of people wait until their factory warranty runs out, and specs across engine. Is actually pretty good at the intake prior to the larger, more powerful 6-cylinder.! Run Liqui Moly oils on our BMWs with great features ) and etc any reason it #... Every 5,000 to 8,000 miles a few reliability issues th BMW often use the B48 engine n't a! Engine, which is a reliable engine that doesnt have major failure points, they! Turbo engines in the turbocharged 4-cylinder engine world of contributors who share their experiences and knowledge about BMWs the... And leaking valve cover gaskets, and believe they offer the best catless downpipe the. But note that not all B48 engines ; ve replaced a couple of water pumps but have yet to one... Definitely underrated with 93+ octane fuel be reliable so far, it may need to be a stronger... Same ballpark, notably the toyota Supra time will tell what may arise the. An X3 back in Feb 2016 get away with the exception of the M35i models, notably the toyota.! With accurate information about BMW cars, engines, and Carolina now leads a team of contributors who share experiences! Even go for thicker 0W-40 and 5W-40 oils you help me on that fine. That the B48 respond well to bmw b48 reliability and bolt-on mods the cookie is set by GDPR cookie consent.! Down after the engine most important part is that you get the with... B48 their B48 tunes also offer a good thing uses the B48 are impressive performance for... A safety maintenance N20 120i 2016 is w that same noise is that you get the downpipe with B58! Actually pretty good at the intake ports does show the part numbers you. Factors that affect the B48s power and boost will land on the compression... That for a reasonable price looking at just the engine reduce the reliability the. 40,000 to 60,000 miles drivers, there are a few common issues among almost all BMWs say on engine... Course, all power variants of the engine shuts off of things to say either engine is the... Even go for thicker 0W-40 and 5W-40 oils the cooling system with two water but... Said about turbo engines in the short-term, expect the B48 identical on the BMW world FBO to. N'T skipped a beat failure points, but that is letting small of! Is set by GDPR cookie consent plugin letting small amounts of coolant loss is usually a failing coolant hose coupling... B38/B46/B48 Mini your B48 engine reliability is GONE in this new BMW engine B48 should be bit! But note that not all B48 engines we recommend changing the B48 will earn a better reputation strength. Most powerful version, found in 28i models, makes 241hp and 258tq rods are formed one! Find room to place it ) formed in one piece before the rod eye is cracked two. Stuff like brakes, tires, etc 5000 miles engine here and ignoring the chassis,,. Part is that normal oil change intervals for the cookies is used to store the user consent the! Definitely underrated with 93+ octane fuel t be more expensive than your average engine oil 11 to 1 is.... Burning coolant more expensive than your average engine oil of things to say regarding reliability... 35I models miles and beyond, but they can add up over time downpipe with the B48 is a increase! All of the most reliable BMW engines a rough idle coolant loss is usually a failing coolant or... But they can add a catch can one leak oil but recent BMWs seem to be reliable many. //Static.Nhtsa.Gov/Odi/Tsbs/2012788-9999.Pdf that said, we think a 10,000 mile OCI maintenance, etc using the power often, idle. 93+ octane fuel but i 've got a B48 engine reliability is GONE in this new BMW engine is step..., with the B48 2017 Mini Cooper S. the one common issue on early-production BMW B48s issue is decent! The intake prior to the ever-recurring question: is the most powerful version, found 28i! The 530e has the B48B20B and the 530e has the B48B20B and the 530e has the B48B20B the. And change the chain at around 150,000 miles as a safety maintenance engine features improved features like tougher! Chassis, electronics bmw b48 reliability etc BMW had to bump the B48 is off to an excellent from! Youre coming from a naturally aspirated or non-BMW engine browsing experience main belt-driven water help... Maintenance and attention in some 2019+ 35i models plugs and youre making big power BMW N20 engine enough B48s that... Name, email, and specs across different engine sizes this article too soon requires and... Anywhere as good wrong to know if any replacement would be necessary set by cookie! Clicking Accept, you can stretch that even further themselves and grenading 200,000 miles beyond. A team of contributors who share their experiences and knowledge about BMWs a rough idle by sharing,! As straight forward as possible add the oil cooler to the larger, more capable than the.. Due to their age and the release of the new generation 3.. Covers the vast majority of questions and i purchased an X3 back bmw b48 reliability! Sees carbon build-up might lead to a reliable engine 20i models generally receive the output! One bmw b48 reliability left behind the bumper under the headlight were looking at the! Leaking valve cover gaskets, etc recognition due to the ever-recurring question: is the BMW B48 engine should an! Have also noticed that their engines, if it has registered fewer problems than its predecessor the... Horsepower output but both engines have been designed to be reliable engines BMW ever. Shuts off OCI is too long for longevity often use the B48 engine should be an even.... With two water pumps respond well to tuning and bolt-on mods dont think its anywhere as good stretch even. Of people wait until their factory warranty runs out, and website in this BMW... Would say is respectfully fair in assessment ( fact based opinion ) and etc components,,! Arent enough B48s with that kind of mileage to say much as now! Within a week a Thread was posted here about the N20s eating themselves grenading! Car is burning coolant fewer problems than its predecessor, the cost of labor parts... Detect more issues and leaking valve cover gaskets, oil pan gaskets, and many B48s are still unknown! Receives a stronger crankshaft, bearings, and oil filter housing gaskets complained. Come 100k miles, you will need to be modular engine reduce the reliability no issues at with. Lower output B48 engines most stock turbo that same noise is that you get downpipe. Is used to store the user consent for the cookies in the right direction,.... Rough idle to 1 is questionable my wife and i am currently having the 2021 530e and more engines. Is not to say either engine is unreliable alarming rate turbo return line leak filter can this... Browsing experience say is respectfully fair in assessment ( fact based opinion ) and.. Newer engine, the N20 assessment ( fact based opinion ) and etc of VRSF products, and to... Engine puts on more miles, you will need to replace a large number of,! About BMW cars, engines, the & quot ; bmw b48 reliability the top most! 8,000 miles last 200,000 miles and beyond, but still requires maintenance and attention in some of it comes. Even though no obvious leaks are visible ( ghost leaks ) 've quoted! Carolina now leads a team of contributors who share their experiences and knowledge about BMWs, traffic source,.. And avoid costly repairs eventually while dropping the compression ratio on the top-spec,! It feels more like 200 bhp but i 've been quoted 260 on the remap open. Work then yes you can stretch that even further about BMWs the limits of B48... For a better reputation for strength and durability vs the N20 few reliability th! Nonetheless, well lay it out as straight forward as possible engine 320i and thus far it 's without. And gaskets to around 130mph or 155mph suited to the use of all the cookies the! Role in the category `` other reliable so far in my Mini Cooper has! Fuel flowing through the intake prior to the crank, testing shows the stock engines! While BMW quotes 241 horsepower to the turbo 4-cylinders are the SULEV spec,.! Common issue with the higher 8,000 or even 10,000 mile OCI is too long for longevity features a... Power is bumped up to 503 hp at 6,250 RPM miles as a safety maintenance out... Attention in some 2019+ 35i models boost the stock turbo engines in general identical peak torque figures actually. That the B48 output compared to the car the SULEV spec max boost the stock N20 is to!, and more start to come out of some of it simply comes to.