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      09-15-2019, 10:12 PM   #6
johnung
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Drives: 2015 BMW 335i x-Drive Auto
Join Date: Oct 2017
Location: New Jersey/Philadelphia

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Quote:
Originally Posted by Tantibus View Post
Hi guys!

I have a question in relation to the differential ratios on the f32 models.

I’ve blown my rear differential and was wanting to source another one, but the ratios are different.

There’s a 3.15 and a 2.81 ratio. I was wondering if there’s a way to find which one can be used without looking at the diff under the car and what each of them are for?

It’s a 2015 420i, auto gearbox and n20 engine.

If someone can help, it would be a huge help!
Getbmwparts is a good source for correct part numbers too
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