Dust.
A pleated and flexible protective device used over bare metal that collapses and expands with travel. cover. Bumper. Damper. Protect tube. Rubber Boot. Strut Shield. Suspension Strut Bellows.
Suspension Strut Bellows
Fits 530i, 540i, M5, M6, Z4
530i; w/Elect Damping Control. 540I. 540i, M5. M5. M6. W/M MODEL. W/M6. W/O AWD, W/M5. Z4; 3.2L.