Riding on old bump stops can really ruin the quality of your BMW's ride. If you're already replacing your shocks and springs, be sure to pick up some fresh bump stops to service your vehicle correctly.
Bump stops provide a bottoming cushion on rough roads, limiting hydraulic damper travel to prevent suspension bottoming and damage. They also improve ride quality, softening harsh impacts. Replace them when installing new struts.
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If you are removing or replacing your rear shocks, you should also replace your bump stops to ensure you won't bottom out due to a deteriorated bump stop.
