[scanspeak]

Have all the bugs been sorted in the latest B58 turbo motors or do they now still suffer the same problems as the old naturally aspirated engines?

[Bimmer_Engineer]

Seems like this would be better posted in the f30 forum...

[colorado.e9x]

Hard to say, I doubt any B58 is near 100k+ lol

[feuer]

They have rod bearings coated with thermoplastic for smooth stop and go so chances of being as reliable as n52 are next to none.

[CTinline-six]

Originally Posted by colorado.e9x

Hard to say, I doubt any B58 is near 100k+ lol

+1

Hard to say if something that's so new is reliable.

[Efthreeoh]

Originally Posted by feuer

They have rod bearings coated with thermoplastic for smooth stop and go so chances of being as reliable as n52 are next to none.

Or maybe longer if one programs out the BS start/stop function?

[Efthreeoh]

This may help you decide.

The engine block shares a lot of design aspects with BMW's diesel engines. Closed deck design helps strengthen block for gas turbocharging.

[Efthreeoh]

Originally Posted by feuer

They have rod bearings coated with thermoplastic for smooth stop and go so chances of being as reliable as n52 are next to none.

Maybe BMW should give me one for long-term real-world durability testing

[smass]

Which B58? They are already on their 2nd version. And it has major revisions when compared to the original. N52s are all the same with only minor changes.

https://bmwtuning.co/b58-vs-b58tu1/

[feuer]

Originally Posted by Efthreeoh

Maybe BMW should give me one for long-term real-world durability testing

Most definitely! You put a lot of miles on your e90 n52. In some official document bmw states serviceable life expectancy on said plastic coated bearings is 100k miles, stop and go or no, regardless. Also, the whole package isn’t build with longevity in mind. None of the cars these days are.

[Smgs1992]

No nothing is as reliable as a N52 with their waterpump, valve cover gasket, oil filter housing gasket, oil pan gasket issues.

[desertman123]

Originally Posted by Smgs1992

No nothing is as reliable as a N52 with their waterpump, valve cover gasket, oil filter housing gasket, oil pan gasket issues.

Like every other BMW?

[JonOhh]

Originally Posted by Smgs1992

No nothing is as reliable as a N52 with their waterpump, valve cover gasket, oil filter housing gasket, oil pan gasket issues.

With nearly every engine option on the e90 platform having these known problem spots, I'd consider those e90 or N-Series engine issues, not n52 issues specifically.

The n52 is known for its dependability and reliability, despite it's N Series engine issues- which is why it's likely being used as the benchmark here. I too would like to see a B58 go to astronomical mileages dependably, but only time will tell. It's a much more complex powerplant.

[Smgs1992]

Originally Posted by desertman123

Like every other BMW?

Yes. I just laugh when people say it's reliability when those are common issues among all of them and other bmw engines are supposedly far more unreliable when the majority of issues are prevalent in the N52 as well.

[JingChai]

Any turbocharged engine will require more maintenance than a normal aspirated engine. It's all about how the car is looked after.

[Red_Bean_Bun]

The closed deck design and improved electrical system is much better than the N52.

[CTinline-six]

Originally Posted by Smgs1992

No nothing is as reliable as a N52 with their waterpump, valve cover gasket, oil filter housing gasket, oil pan gasket issues.

That really isn't bad if you think about it. There are a lot of cars out there with horrible reliability issues.

I have friends/family with GM products that have gone through multiple transmissions, Fords with numerous exhaust manifolds, timing chains, etc, and even Toyotas and Hondas with issues.

A friend just sold his 2008 Tacoma. He owned it from 80k miles to 130k miles. During that time this is what broke:

-A/C compressor failed
-Both front wheel bearings
-Both front calipers (one seized so bad it smoked and turned the rotor purple)
-Front axle shaft bearings
-Headlights got water inside them
-Brake light switch
-Frame was beginning to rust, even with yearly fluid film applications
-All tire sensors replaced at least once, light went on again right before he sold it, scanned it and it was another sensor issue.

Truck was dealer maintained by Toyota prior to him purchasing it.


I doubt the B58 will be as reliable as the N52 due to having a turbo and more complexity.

[CTinline-six]

Originally Posted by Efthreeoh

This may help you decide.

The engine block shares a lot of design aspects with BMW's diesel engines. Closed deck design helps strengthen block for gas turbocharging.

The block and internals are strong, but so is the N54, it's everything else around it that breaks.

[e90yyc]

If your only concern is reliability then I have nothing to add to what’s already been said.

What I can tell you is that if you are wanting an engine that is unbelievably smooth, refined, and powerful, you won’t be disappointed with the B58. Such an amazing engine. Not sure if you’ve driven one; if you haven’t, do it.