I picked up a 15 year old BMW 128i in July. The suspension has all the creaks and groans. I replaced a couple arms in front that had worn out bushings but the rest of the arms seem good. I plan to replace the shocks and bump stops and all the associated hardware. 97k miles. I'm not after lowering, just a refresh would be great. I'm trying to understand if the original springs need to be replaced.
How can you tell?
Without measuring spring rate, height with no load vs a brand new, or any number of other tests that would require disassembly... no clue.
You'd have to take them off the car, i believe.
Depends on length and metallurgy...some sag after 5-10 years, some last approximately forever. If the ride height hasn't decreased from stock then they haven't sagged.
You'll need to log in to post.
