The rear diffs are prone to failure at higher mileages and the earlier e70's had smaller diffs than the facelift cars from what I understand. You see a lot of e70's for sale now needing a rear diff in the uk. I looked up your sizes and while they are a little more of a difference than the standard ...

The 2mm is from BMWs own manuals which states that there should never be a difference in tread depth between any tyres of greater than 2mm. It doesn’t matter whether that’s a new tyre, or a part worn. It’s what BMW themselves state in their Technical Instruction System (TIS) data sheets for ALL ...

It might have been triggered well before you bought the car. Many owners decide OEM tyres are too expensive or don’t follow the 2mm guidance. Sadly you seem to have got the bill though. :cry:

Use if non-OEM tyres aren’t always the cause, but they are frequently enough for warnings to be known in ...

:hi:

One issue with all but the very latest xDrive cars is they are very intolerant of the ‘wrong’ rubber. In BMWs car that means anything other than tyres with a ‘⭐️’ on the sidewall that indicates they are BMW approved. If the overall diameter is 2mm different between any one tyre or axle set ...

Hi,

I had changed my tyres to the slightly higher profile, as I am in the Caribbean where the roads are very bad, not long after (a month or so) the rear diff blew up. Before this about two weeks ago the main belt pulley came off as the inside rubber was rotten, could this be connected with the ...