51 23... Check actuator

WARNING: This page does not describe the selected car, but rather 31 other vehicles, including the 2015 BMW Alpina B7L, 2015 BMW Alpina B7, 2015 BMW 750i, 2015 BMW 750Li, and 2015 BMW 740i. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

REMOVE ACTUATOR

Check actuator for damage.

TEST RESULT CHART

Test result	Solution
Housing (1) damaged	Replace actuator
Actuator top section (2) can not be moved by hand	Replace actuator

Fig 1: Checking Actuator

Courtesy of BMW OF NORTH AMERICA, INC.