[hrf]

I think if I keep up with maintenance and avoid any mods like down pipes, turbo, increasing boost etc, changing engine mappings, reliability should be good, especially for 2025 model. I plan to keep this car for 8-10 years at least with 3-5K miles a year. In addition, will never try launch and other unneeded stress. Just drive aggressively take corners as fast as I can. It should last long time. I usually treat my ICE cars like a human friend and they last very very long time. You do not have to spend too much on them, just reasonable regular maintenance and care.

[CSBM5]

Those prices are apparently dealer inflated with a large multiple on that. For example, the oil filter housing, 11-42-8-596-283, is available from this BMW dealer for $324 including both gaskets, new filter and new cap. I've never owned a B46 before, but it doesn't appear to be too hard of a DIY job.

However, it seems typical for BMW plastic coolant system parts, sadly. Last year I replaced the water pump and thermostat on my beater E91 328i, and I just barely applied some force to remove the tank to radiator small hose, and the fitting snapped right off the radiator. I ended up replacing the radiator and its associated hoses too; however, none of these parts were very expensive. I bought some from FCP but most from bmwminipartssolutions since they have outstanding discounts off BMWNA MSRP. The car was on year 18 and at 160,000 miles though, so it had seen a ton of thermal cycles over the almost two decades of use.

[QUiKSR20]

Originally Posted by hrf

I think if I keep up with maintenance and avoid any mods like down pipes, turbo, increasing boost etc, changing engine mappings, reliability should be good, especially for 2025 model. I plan to keep this car for 8-10 years at least with 3-5K miles a year. In addition, will never try launch and other unneeded stress. Just drive aggressively take corners as fast as I can. It should last long time. I usually treat my ICE cars like a human friend and they last very very long time. You do not have to spend too much on them, just reasonable regular maintenance and care.

Just keep in mind the motors are tough when it comes to mods like you mentioned ie more boost / downpipes etc.. Thats not the issue,
The issue is the cooling system post 75k miles.

If you plan on keeping the car that long no amount of babying the car or maintenance is going to fix coolant leaks and cracked plastic parts
like oil filter housings / heater control valves / radiators etc plaguing all the G-Series cars with B48/B58s ( thats what this post is about )...

Reliability before 60k miles is a joke, It better be reliable until then its practically new still.

[Vuurwater]

Originally Posted by QUiKSR20

Just keep in mind the motors are tough when it comes to mods like you mentioned ie more boost / downpipes etc.. Thats not the issue,
The issue is the cooling system post 75k miles.

If you plan on keeping the car that long no amount of babying the car or maintenance is going to fix coolant leaks and cracked plastic parts
like oil filter housings / heater control valves / radiators etc plaguing all the G-Series cars with B48/B58s ( thats what this post is about )...

Reliability before 60k miles is a joke, It better be reliable until then its practically new still.

Saw some issue regarding the OFH to on FCP euro DYI channel.
Driving a G21 330I with around 60k miles myself thinking about replacing it out of precaution. Did it cause any extra damage to your car when OFH was cracked?

For anyone wondering about the reliability I would advise check FCP euro DIY channel and watch vids regarding the B46/B48 engine.

[QUiKSR20]

Originally Posted by Vuurwater

Saw some issue regarding the OFH to on FCP euro DYI channel.
Driving a G21 330I with around 60k miles myself thinking about replacing it out of precaution. Did it cause any extra damage to your car when OFH was cracked?

For anyone wondering about the reliability I would advise check FCP euro DIY channel and watch vids regarding the B46/B48 engine.

No damage provided when it went from a leak to just dumping everything out you stop the car and get it towed.. Its a $2000 repair though.. Even the shop I use when I dont DIY said its a pita, You gotta move the air to water intecooler/intake manifold and theres all kinda delicate plastic stuff in the area with some bolts hard to reach..

Its more of an annoyance for something like this to break which is not a maint item and for it to cost so much to fix.

[Vuurwater]

Originally Posted by QUiKSR20

No damage provided when it went from a leak to just dumping everything out you stop the car and get it towed.. Its a $2000 repair though.. Even the shop I use when I dont DIY said its a pita, You gotta move the air to water intecooler/intake manifold and theres all kinda delicate plastic stuff in the area with some bolts hard to reach..

Its more of an annoyance for something like this to break which is not a maint item and for it to cost so much to fix.

Yes I agree, definitely a miss from BMW to save some cost in the short term but damage the reliability in the long term. It makes me sad as I love the car but this makes me worry every time I plan a long drive. Still have one year of extend warranty bet it will happen shortly afterwards. Anyway if fixing it will make the car reliable again for 60k miles/ 100k kilometer I'll do it to enjoy the car longer. Even though it shouldn't be necessary and sucks.

Is there anyway to check your OFH health easily?

[CSBM5]

Originally Posted by Vuurwater

Saw some issue regarding the OFH to on FCP euro DYI channel.
Driving a G21 330I with around 60k miles myself thinking about replacing it out of precaution. Did it cause any extra damage to your car when OFH was cracked?

For anyone wondering about the reliability I would advise check FCP euro DIY channel and watch vids regarding the B46/B48 engine.

That is an excellent video on the B48. Thanks for the pointer! I don't even own one, but I found it very interesting, and I learned a lot about the engine. Especially of note is the TU version - I think that is the most dramatic "TU" update to an engine I've ever seen BMW do (in particular the entire timing chain design re-engineering along with the external drive belt redesign).

He also shows how FCP carries a Rein manufactured aluminum oil filter housing (replacing plastic) but at the moment only for the pre-TU B48 (F30 et al). Here's a link to that video that starts at the discussion of the oil filter housing.

[QUiKSR20]

Originally Posted by Vuurwater

Yes I agree, definitely a miss from BMW to save some cost in the short term but damage the reliability in the long term. It makes me sad as I love the car but this makes me worry every time I plan a long drive. Still have one year of extend warranty bet it will happen shortly afterwards. Anyway if fixing it will make the car reliable again for 60k miles/ 100k kilometer I'll do it to enjoy the car longer. Even though it shouldn't be necessary and sucks.

Is there anyway to check your OFH health easily?

No way to really check if its not leaking since the stuff that breaks is usually from the inside out.. And I agree its sad because I really do love the brand and the cars... But my wallet cant afford to keep dumping money on stuff like this that shouldn't be happening.. I can afford it technically but why would I want to.

[hrf]

This is intersting. Not just BMW, Porsche and others all use plastic parts that go bad. Still this is one of the best German reliable engines if you compare to AMG and Audi. Intersting how BMW improved, because previous engines and BMW cars of 2010s were not that reliable. BMW is back to be solid built German car which is cool. I can say that it is super tight and my 2025 M340 feels like made from solid rock.

[Montaver]

Modern BMW’s are very reliable, they have come a long way. Think of it this way, if someone said you have to buy a luxury car to last 20 years what do you choose? Your either getting a Lexus, Porsche, or BMW.