As with most second hand cars, it is difficult to gauge what has been played with by the previous owners.
Something I didn't notice when I bought the car was the ride height. It was not something I noticed as the tyres that were on the car were massive and closed the gap. I have since reverted back to wheels and tyres of the correct spec and the issues become more apparent. Looking at my spec sheet, I am supposed to have M-Sport suspension, and this doesn't look right - The rears sit noticeably higher than the front
The top photo is after rear lowering springs were fitted, bottom is before.
- Z4 suspension.jpg (275.22 KiB) Viewed 1142 times
When investigating, I noted the front O/S spring to have the part number 31336760621. They seem clean and possibly replaced prior to my ownership. After lots of googling, I found that these may be the correct springs. Equivalent would be Suplex 06247 (without options?)
The rears, however, sit much higher than the fronts. I suspected these are SE springs. There are some numbers on the springs, 627112791 - I don't think these are the part numbers. A google search doesn't return much, but I did find the same numbers printed on some M-Sport springs from a 3.0i. I am unable to determine if I did indeed have M-Sport springs, in which case, why were they sitting so high?
The goal is to have the rears with the same arch gap as the front. I just wanted to make sure that there is not any underlying problem and that it was just mismatched coils.
Regards
It's a common thing as the OEM rear springs snap, so many owners go to eurocarparts and purchase new rear springs, without realising they aren't for m-sport equipped Z4's.