[sharmander]

First time poster, long time lurker here. I have a CPO m240xi at ~53k miles. From the ultimate maintenance guide, I see that its highly recommended to replace transmission & diff fluid at 50k.

I just called my local bmw dealership in nj for a quote, and he came back at 2450 (!!!) including labor. From what I've seen, this is 2-3x more than what people generally say this maintenance should cost (800-1.2k).

I have an indy shop near me that's fairly reputable (works on mclarens, porsche, M, AMG, etc) that I'm going to get a quote from when they take a look at the car.

I have two questions:
-has anyone had issues AFTER they got their transmission & diff fluid replaced, and if I have drivetrain issues afterwards, would getting this done at a 3rd party void my CPO drivetrain?

-how much approximately did you pay for this service, if you've gotten it either at a dealership or indy?

Thanks!

[Ajowhan]

Holy shit, diff flush I have been quoted mostly less than $200 by Indy.

The transmission fluid and filter and pan.. Thats roughly mayb $300 parts and maybe another $300 labor.. Plenty of video online too and doesn't look too hard.

$2500 is definitely daylight robbery..

[jzeiler4]

You didn't say if it was a 6MT or Auto - makes a big difference. Looks like you have x Drive so there are two diffs, a transfer case and auto trans. Lots of $$$.

[lateapex'er]

OP - I see you are in NJ. I got my 6MT transmission fluid changed at Park Ave BMW in 2019 for $345 out the door. They had me sign a waiver as they said the fluid was "lifetime". I laughed. 50k is a suitable interval.