Additional parts to be replaced when changing struts

[renaissance]

I am going to have both front and rear struts replaced with Bilstein B4.

Just wondering what additional parts to be replaced as well ("must have" and "nice to have")?

For those red circled besides struts, are they necessary? And how about nuts?

Thanks!

PS: 2010 E90 M3 w/o EDC & mileage 120K (km)

[Redd]

Definitely change the rear strut mounts too. They are made of foam and don't last. If mileage is high then change the front strut top mounts too. Not sure if Bilstein include the bumpstops but those should be replaced as well.

[renaissance]

Originally Posted by Redd

Definitely change the rear strut mounts too. They are made of foam and don't last. If mileage is high then change the front strut top mounts too. Not sure if Bilstein include the bumpstops but those should be replaced as well.

Yes, my mileage is around 120K (km).

Definitely will buy 31302283650 (front strut top mount) and change if needed.

But what are "rear strut mounts"? Those I circled in the screenshot?

[Redd]

Rear strut mounts are 7, 5, 6 and 4 on the rear strut diagram.

[renaissance]

Originally Posted by Redd

Rear strut mounts are 7, 5, 6 and 4 on the rear strut diagram.

How about 3 (Auxiliary shock absorber)?

[Redd]

Originally Posted by renaissance

How about 3 (Auxiliary shock absorber)?

3 should be the bumpstop and yes it should be replaced.