This cap plays an important part of keeping your braking system pressurized. This part, 34 32 1 161 541 is a brand new, unused Genuine BMW brake fluid reservoir cap for ATE systems. The brake fluid reservoir cap is part of your BMW's brake hydraulic system and is crucial in supplying pressurized brake fluid to the brake calipers.
Fitment: ATE brake reservoir in generally found in BMW E30 chassis from 09-01-87 on.
E30:
318i, 1982-1993
318is, 1990-1991
325e, 1984-1989
325i, 1987-1993, build date from 09/87
325 ix, 1988-1991
M3, 1987-1991
Reservoir tank shown in picture not included.