IMPORTANT: Before beginning work, fully press the brake pedal several times to reduce the vacuum pressure in the brake servo. This makes it easier to remove the vacuum hose.
Vacuum hose and non-return valve are welded together and are replaced together as a single unit.
Necessary preliminary tasks:
Pull off partition wall seal upper part (1) in direction of arrow.
Remove non-return valve (2) from brake servo.
Installation note: Check gasket for non-return valve and replace if necessary.
Unclip vacuum line (1) from line clip (2).
Unlock snap fastener (3) and detach vacuum line.
BMW X3 Owners Manual > Active Blind Spot Detection: The concept
Two radar sensors below the rear bumper
monitor the area behind and next to the vehicle
at speeds above approx. 30 mph/50 km/h.
The system indicates whether there are vehicles
in the blind spot, arrow 1, or approaching
from behind on the adjacent lane, arrow 2.
The lamp in the exterior ...