This little grommet seals the hole where your antenna base pokes through the rear fender. It is often the source of water leaking into the trunk. If yours look dry-rotted, we suggest you replace it before it leaks.
Also Known as: Antenna Mast Base or Grommet, Short Rod Aerial
BMW Part Number: 65 21 8 411 562 ( 65218411562 ) 65-21-8-411-562
Fits Z3 and M Roadsters built AFTER April 1, 1999