X3 Xdrive Tyre replacement

[2SCOOPS]

Howsit Guys. My wife's X3 xdrive was in for a service with BMW and they advised that the rear tyres need replacing however the front tyres are fine.

They have sent me a quote to have the rears replaced only. Did some research and found the below on BMW's website. Should all four tyres be replaced and for the guys with xdrive do you follow this religiously or is it fine to replace just the rear two tyres only?

What should I pay attention to when changing tyres on my BMW?​

If you change a single tyre on your front- or rear-wheel drive BMW, make sure that the difference in tread depth between the new tyre and the other tyre on the same axle is no more than 2 millimetres. In case of higher deviations of tread depth between two tyres on the same axle, both tyres must be replaced. For vehicles with BMW xDrive, all four tyres must be replaced at the same time to avoid damage to the transfer box.

 

[KPM3_30]

I have always changed all 4 tyres at the same time, for fear of transfer case issues in future.

The xdrive system can be sensitive and a rebuild can be a massive bill. I would rather err on the side of caution and pay a little more now, to (hopefully) prevent a lot more later.