I would say for practicality purposes, a B48 will always be more reliable on average than a B58 because there is 33% less critical parts that can fail. So statistically, it should be more reliable.
But in the real world, B58 is more reliable: leas heat concentration, less hp/L. B48 is notorious for oil filter housing cracking because of said heat. It happens a lot less on the B58.
The 6-cylinder B58 engine is great for the big US roads but in smaller ones like in Europe, the 4-cylinder is more than enough for most people. Additionally, many countries in Europe have huge taxes for 3-lt engines and that makes it even harder to own.. not to mention the insane gas prices of 2023 ( 2.03 US DOLLARS per liter for regular gas currently speaking ) I think B58 engines are fantastic but are for those who want more than an A to B vehicles and who are also willing to pay more for gas and maintenance.
I'm blown away with my 2 liter B48 engine, 430i GC M sport. Still get 34 mpg on interstate. I love everything about this engine....it's sounds great too!!! Dinan exhaust. 75,000 miles zero maintenance....except oil every 10k and spark plugs. Trans oil too.
I'm thinking about getting a 2018 430i. Is it good for a 1 hour commute to work? How's reliability? I just don't want it breaking down on me. How's it in snow?
My B48 is at 500hp thanks to a upgrade on the Turbo. Torque as well has been way increased. I can blow away most M cars.. Fun surprise/wake up call for those drivers off the line!
I went with the IM 450 by in-pursuit motorsports, and the enlarged downpipe. The cars a beast with the m package and the m diff and adaptive ride, and because its a lighter car than some upper M cars, that even adds more to its top speed. Also added a full Turner carbon fiber front and rear kit along with MP exhaust system Good bye M 8 an the track, it was awesome at track RA! @8020Media
who tuned your car on im450 upgraded turbo and what fuel you running? I just installed mine last week and on a custom e25 fuel base map. Cant wait to start throwing some boost at it and get it dialed in for a dyno and draggy run.@@audized
Update : B58 stock unopened with supporting mods record is north of 1100whp and capable or having a high 8 seconds 156mph 1/4mile car car. 1stockf30 did it a few days.
@@mazzstefferson6062 I believe the limitations of the B48 unlike the B58 is the balance shafts. I believe for it to start truly making 800-900whp someone will need to make an aftermarket billet or forged Crankshaft along with a balance shaft removal kit. I'm not sure if there are any other 4 off the shelf 4 cylinder BMW Crankshafts that will be able to fit in the B48. Maybe there is one I don't know of. Or maybe it's a matter of working with the current balance shaft setup and improving upon it for making 800-900whp.
I own a 2016 B48 currently at 180k miles in a F30 330e. I had to replace so far, two breather/vent hard cooling lines to the engine block under the intake manifold. The oil filter housing, one of the cooling pipes that snapped during removal, radiator, water pump, water pump bracket, turbo coolant return line, and feed line o-ring. Auxiliary heater (not part of the engine but it failed because it was heating in a dry state and died in the process. No mechanical issues as of now. changed the oil every 17k-20k mile as per bmw guidance with ll04 0w30 from the dealership, now I'm using LL17fe+ 0w20 from millers oil. However because we covered so many miles in a short time we had two oil changes a year despite the high interval. It started burning 1 litre of oil every 2k-3k miles now. Good engine, unfortunately lacks the smooth running of the straight six. Loads of low end torque and generally feels effortless to drive (I do have electric motor assist though being a 330e).
Thanks for such amazing master class! I'm new working with cars, but I love the E82 silhouette and that's what I got my 125i. Thinking on a swap for a B48 on my car, I don't know if it's a good idea or not, but to me it sounds fun.
In the UK the lower powered B48 fitted to the 20i versions got weaker but higher compression pistons than the 25i and 30i versions. the lower powered versions tend to melt pistons when tuned.
That's not certainly true I think. There are some 20i that have the same engine as the 25/30i. I think they started doing that at the start in late 2015 and stopped in october 2017, so now every engine (20 and 30i) now have the same engine internals.
@@pablonavaridas3302do you have part numbers to verify your claim, because 320i and 330e have the B20A engine code, BM3 and MHD tuning software most likely will break your engine. If you go to your local BMW tuner it will be more accurate and reliable. In the safe zone
I had a 2018 320i with a stage 1 tune to around 250hp and never had any issues, went like fuck. Got a 430i now with the same B48 but on the higher factory tune, feels about the same as my tuned 320i, only sounds cooler because of the valved exhaust.
I drive both a F22 218i B48 even though it’s heavily detuned from factory with 136 bhp and I also drive an X3 M40i B58 350 bhp on a daily basis, the joy I get from the X3 is the pure power and sound of the B58 when driving it in a straight line with my foot fully down on the gas whereas my 2 Series B48 is so much more fun, light with the handling and steering and feels like a go kart around town but again of course it just lacks in the power straight line category. I drive both cars on Eco Pro mode with daily normal sensible driving and I’m well impressed with my B48 2 Series, hardly feels no different than the B58 but again only when sensibly driving them that you think do you really need a powerful B58 when the B48 is just enough. But I know I’m comparing a coupe to an SUV which both totally different cars and in a way can not really be compared in terms of driving experience but nonetheless it’s all about needs and depending on your situation but both such great amazing engines.
I own a x3m40x and they give me loaner when drop off for oil service and those x3 30 series are fun and quick just dont have that grunt and sound but fun and zippy. LOl
You said the B48 tops out at around 300hp, but there is a version of the B48 engine that does just over 300hp as standard(probably underrated too). This is found in the Mini GP3, Mini Clubman JCW LCI and BMW M135i and M235i. These are slightly different to the regular B48 engines. Not sure what these versions of the B48 are capable of when tuned, as I haven't seen many tuning them.
B - They are great! Keep us updated on your build. We have a mod guide video that may help you here: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-UT0ErqdtDCU.html&lc=Ugzw3jea8mkspEAr1vx4AaABAg
Dorian - I'd look into some power mods before worrying about an LSD, I don't think the JCW is putting enough power down from the factory to warrant needing an LSD and even with full bolt-ons it might still be fine. Take a look at this article we have on the Cooper S - pretty sure the JCW is just a differently tuned version of the one in the S. tuningpro.co/best-mini-cooper-s-performance-upgrades/
What battle ? One is 4 cyl engine, the other is 6 cyl . Technically is the same engine design with more or less cylinders , power , cost, consumption, taxes for different buyers . Who can afford more, buys the 6cyl , who likes to keep it cheaper , buys the 4 cyl .
@@8020Media Ok . Keep in mind that in most European countries , the yearly tax on higher capacity engines is way higher than on 2L engines . So it is an offering for those who can afford it .
I have a 320 b48, did a bm3 stage 1 now power output is only 5whp off my mates 330i stage 1... so you coulld say my 320 is stage 1 plus If all part are the same, can i not habe my 320 compression ratio adjusted to that of 330?? Even though itll only make up the 5whp difference 😂???
There are plenty of other factors that go into dyno numbers and whp. Not sure if you both measured on a dyno but two cars with the exact same engines and exact same mods dyno'ing in the exact same weather conditions will still put down slightly different numbers. 5whp is a very reasonable difference. With that being said your compression ratio is different because you have different pistons. Compression ratio can't be adjusted without doing some major engine modifications - you can't just tune in a lower compression ratio. Go drop an intake or a downpipe on it if you don't already have one and then you can get more than the 5whp you're looking for. If you don't have an intake I'd highly suggest one since you are tuned.
@@justindaniel5959 well it was before they mended it in 2021, also mg flasher is more of time bomb they adjust the knock tables, and im doing forged pistons , new turbo so 500bhp en route, something a little different
I had a 320i with the 190hp B48, put a stage 1 tune on it and it made around 250hp, thats a huge improvement. I've now got a 430i with the 250hp B48 with 110k miles, no reliability issues with either. I'd prefer a B58 purely for refinement and power but nobody can have any critisisms of either engine, they're brilliant.
Yeah they have both been very reliable engines. B58 is great just cause of the extra power and power potential but B48 is a great little engine that can produce some respectable power with some upgrades while maintaining good reliability
Genuine question. I've seen some other channels make well over 500hp in the B48 with upgraded turbos. If majority of the internals are the same, and the B58 is able to double it's horsepower, why wouldn't the B48 produce the same results (meaning doubling the horsepower). Are there other factors like block size / compression that would make the B48 not be able to withstand the same percentage results as the B58?
There are multiple aspects to doubling the power. For one, there's hp per liter. Let's use the original engines and power output rather than the TU engines as an example: B48B20O0 - 248hp = 124 hp/liter B58B30M0 - 335hp = 111.6 hp/liter Ultimately, the original B48's were tuned more aggressively from the factory relative to displacement. Doubling the power of each would also double the power per liter, which means the B48 would still be tuned more aggressively. The 255hp B48TU and 382hp B58TU have almost identical hp/liter. Outside of that, there are also inherent and very important differences between inline-4 and inline-6 engines. I6 engines are harmonically balanced and don't require a balance shaft, offer better cooling, exhaust pulses are more evenly balanced, etc. The I6 is simply a more robust engine design. In other words - even at the exact same power/liter - the B58 should be the stronger and more capable engine.
Please, my brother, what is your preference? Which one is better in cars in terms of driving and reliability, because many people have scared me of the BMW 3 Series. Is it really bad in shape and its parts are expensive? Which one is better in terms of reliability and driving? I hope you can elaborate. Why do you elaborate? Because I am confused between the Lexus is350 2021 and the BMW G20 330i/ F30 330i Which is better? I read the article that you publish on the Google website. I hope you can tell me which one is better because I am confused. And Which is better in modifying and supplying the engine and sound?
Mohamed - We have tons of B48 content on our website. I think these pages will help you out a lot! Keep us updated on what you decide on: bmwtuning.co/b58/ bmwtuning.co/category/bmw-b48/
Rusty - We aren't going to recommend doing it, but so long as maintenance has been help up well, it shouldn't be too big of an issue depending on how you drive or are wanting to drive. You'll also want to perform preventative maintenance before doing so.
Loved the video and site link! Any opinion on late N55 vs B48 for reliability? I'm in the market for mid/large SUV and am considering F15 X5 or G01 X3 (excuse nomenclature if incorrect).
Nick - Thanks for the feedback! We don't really have anything dedicated to the N55, however, we do have a post that compares the N54, N55, S55, & B58: bmwtuning.co/n54-n55-b58-s55/ We will look into doing a video about this.
I don't think either of these engines are old enough to have any significant data to give an accurate answer to that. I'd say it's a toss up. You could argue the B58 solely because the inline-6 is BMW's bread and butter, and the engine BMW probably has more knowledge and skill in manufacturing. On the contrary, more people are likely to mod the B58 so if you're buying a used example there's probably a higher chance the B58 is or has been modded in the past (which could potentially hurt longevity).
Thank you. I got B46B20B engine, as i understand 46B is the almost the same as B48 but for phev. (some people are saying some components are different, (weaker - ???) is it still ok for JB4???
JB4 shouldn't be a problem. You can check out our article comparing the two engines: bmwtuning.co/bmw-b46-vs-b48-comparison/ Most of the differences are speculative since BMW doesn't explicitly say, but we do know that it uses the same block and internals so the engine isn't weaker by any means.
Yes, that is true - I am aware of a couple that are around the 475-525whp ballpark (so probably pretty close to 600 at the crank). However, those are mostly on built engines and I suspect the ones that aren't built engines won't hold up in the long-term. Either way, I'm not quite sure what point you're trying to make. There are B58's with 1,000+whp. It's the more capable engine, and always will be. That said, if you're looking for a fun 350-400whp car then the B48 can be a great option with an upgraded turbo. Much over 400whp and it's probably time for a built engine - at which point you've likely spent more money than simply upgrading to a B58. Still, there are some benefits that people may appreciate like a lighter engine and less weight over the front axle for better handling, better fuel economy, etc.
The engines are really almost the same. The only difference is the 20i version has higher compression and different pistons and is tuned for less power. Reliability will really be almost the same, however less power is always better for longevity. You can read about the differences in our guide here: bmwtuning.co/ultimate-bmw-b48-engine-guide/
@@8020Media Thanks for the answer! I'm looking to buy a bmw 4 gc because I fell in love with the design of the car. I am researching to see which version would be the most reliable since I want to keep the expenses at the minimum. The 440i which has the B58 which is more reliable on paper imply much more taxes unfortunately..that's why I was left with the 420i vs 430i versions. If I understand correctly the 420i would be the more reliable and durable version long term and 430i would be slightly less because of the added hp. Did I get it right?
I have a 2024 530i G60 - B48. The factory fill is OW20, yet the dealer says I can use 0W30, or even 5W30, However they recommend 0W30 better flow. I'm in Florida I don't mind losing a bit of fuel economy, I prefer my engine to last. What oil viscocity would you recommend ?
E - BMW recommends running LL-14 or LL-17 oils on the BMW B48 engine. The standard oil weight is 0W-20. Newer LL-14+ oils are designed with fuel economy and emissions in mind. LL-01 oils follow older standards, but it's still some of the best oil in our opinion. Ultimately, anything LL01 and above will work well on this engine. As far as weights, 0W-20, 0W-30, 5W-20, and 5W-30 all work well on the B48. Some B48 and B58 owners even go for thicker 0W-40 and 5W-40 oils.
@8020Media last question : I take responsibility for my decision, so no worries. If it was your car, not tracking, but driving spirited in a warm climate such as Miami. What oil would you use 0W30, or 5W30 for engine protection ? For the Rear wheel drive differential. Would you happen to know the oil viscocity ? Also any brands you can recomend for both motor oil, and differential oil Redline, Motul, Amsoil etc... what is the best in your opinion from your professional experience.
Between those options, I would opt for the 5W30. However, both oils will offer the same viscosity during spirited driving since it's the second number (30) that tells you the viscosity of the oil at operating temperature. The reason for the 5W30 is that you simply don't need a thinner 0W oil (cold viscosity) in a warm climate like Florida. As for oil brands, we've always liked Liqui Moly but there's no perfect answer. Any major oil brand is a good choice including Mobil 1, Valvoline, Shell, Castrol, Motul, etc. As long as it meets the BMW certification they will all perform pretty closely. Most G-chassis BMW's use an SAE 70W-80 synthetic differential oil.
I’m so happy to meet you in RU-vid. You have really great insight of b48 b58 and many BMW engine. I just got mini countryman jcw with b48 engine. I just wanna know what makes b48 engine could get 150hp per liter. Generally b48 engine work around 200hp, but mine isn’t. Also worry about the reliability of my engine. Do you have any comments? Thanks very much
@@8020Media thanks for replay! Originally I owned r60 countryman with 325k miles but as you know mini’s prince engine has tons of problem. So I ordered new mini countryman jcw f60 2024
A - Given it is a 2024, there have been some good updates. Just stay on top of maintenance and you'll have a great engine on your hands. We have a ton of other B48 content on our website & on our channel.
Compression ratios are high enough even on the low compression B48's to need premium fuel. You got a BMW, don't cheap out on the gas, it's part of the cost of ownership
What do you think about putting jb4 (in mode 2) on 2023 330e xdrive? Is it worth it? Can it hurt engine/trans over time. Thank you. Great video, good explanation!!!
A - We are big fans of the JB4, especially for BMW engines. We've got at least two JB4's powering our 335 and 135 currently. It is well worth it, so long as you keep up with maintenance. Can it hurt the engine/trans overtime? Short answer, yes. Anytime you increase power over stock levels, the reliability of said components get slightly weaker.
Thank you. I got B46B20B engine, as i understand 46B is the almost the same as B48 but for phev. (some people are saying some components are different, (weaker - ???) is it still ok for JB4???
