34 00 012 Parking brake function check

WARNING: This page is about a different car, the 2010 BMW 135i, 2009 BMW 135i, and 2008 BMW 135i. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Follow instructions for Brake testing on test stand .

NOTE: If deviations are identified during the following check, the parking brake must be adjusted:

Drive vehicle onto chassis dynamometer.

Warm up brakes.

Check handbrake.

0th tooth (handbrake released):

Vehicles with manual transmission: Shift lever in neutral position.

Vehicles with automatic transmission: Selector lever in "N" position.

Without locking differential ≤ 150 N.
With locking differential ≤ 200 N (possibly odd display).

1st tooth:

No increase in braking force with regard to 0th tooth. Indicator lamp can be lit.

2nd tooth:

Indicator lamp must be lit.

3rd tooth:

Increase in braking force.

5th tooth:

The brake force display must have reached ≥ 400 N.

Checking brake force differential at wheel:

Apply handbrake until a wheel circumferential force (measured on brake test stand) of min. 1000 N is reached.

Max. permitted brake force differential right/left ≤ 35 % (referred to greater brake value).

It must be possible to brake with locked wheels with the handbrake.