Antenna Grommet - E30 318/325 (all), E36 318i/325i Sedan - 65211376008

This antenna grommet seals the radio aerial antenna to body, preventing moisture from entering the antenna hole, but also creating a tight fit and presentable appearing for the antenna. 

Fits E30 318i, 318is, 325i, 325is, and 325ix - Coupe, Sedan, and Convertible - 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992

Also Fits E36 318i and 325i Sedan - 1992, 1993, 1994, and 1995 model year 4 door variants. 

The Antenna Grommet is a very common replacement item, and can be the cause of water in the trunk of your BMW.

This part is manufactured by an aftermarket supplier of European auto parts, including many body components. While not carrying OEM status, this part follows the design of the original very closely and uses similar materials. An aftermarket part may even have the same TUV approval as its OEM counterpart. The brand may even be OEM to another manufacturer besides BMW. This aftermarket brand has a two year warranty - the same as Genuine BMW and OEM brands.