What Plastic Parts Need to Be Upgraded for Long Term Ownership?

[HotRodM4]

I’ve had my M4 for 4 years and it has 67XXX miles on it now. Can you guys tell me which plastic parts should be upgraded and replaced with what parts specifically? Obviously I know charge pipes need to get done 😅 (leaning towards ESS).

Side note: I’ll most likely go back to a traditional intake under the hood.

List So Far
• charge pipes
• skid plate
• top mount intercooler

[wishbone]

Skidplate

[HotRodM4]

Originally Posted by wishbone

Skidplate

Installed the Turner one 2 years ago. Best insurance policy on NY roads!

[sdhasher21]

Great thread topic! Subscribing as well, since I’m keeping mine for the long haul. Still need to do the skid plate.

[jaylazy2020]

I’m in a similar situation.

I got charge pipes done when crank hub was done.

So TMIC is next
Then skid plate and as you can see by attached I prob need new radiators and proper covers!

2018 59k miles

[HotRodM4]

Originally Posted by jaylazy2020

I’m in a similar situation.

I got charge pipes done when crank hub was done.

So TMIC is next
Then skid plate and as you can see by attached I prob need new radiators and proper covers!

2018 59k miles

I know I’ll get a Wagner TMIC soon. I don’t trust my OEM intercooler, had to add coolant at the end of last year.

[jaylazy2020]

Originally Posted by HotRodM4

I know I’ll get a Wagner TMIC soon. I don’t trust my OEM intercooler, had to add coolant at the end of last year.

I check my level every week. In the hope I’ll catch any leak early.

[N1rve]

Another common failure plastic part is the coolant expansion tank. It tends to leak at the seams.

https://www.fcpeuro.com/products/bmw...nk-17132284600

Unfortunately, I don't know of any aftermarket.

[DocL]

Gas tank and valve cover. Both are plastic and both needed to be replaced on my 2018 F80 lol.