2011 BMW X5 xDrive 35d (E70) L63.0L DSL Turbo (M57Y)
Vehicle: All Technical Service Bulletins
Drivetrain Oil Leak from Transfer Case
SI B24 01 13
Automatic Transmission
March 2013
Technical Service
SUBJECT
Oil Leak from Transfer Case
MODEL
E70
E71
F25
SITUATION
Oil is leaking from the transmission area, or oil seepage is noticed from the transmission/transfer case area during a service.
CAUSE
The leak can be misdiagnosed as a transmission fluid leak from either the mechatronics sleeve or transmission oil pan. The leak
is actually coming from the transfer case (input or output shaft seal).
PROCEDURE
Before attempting to perform any repairs, check the fluid level in both the transmission and transfer case.
If the level is low in the transfer case, repair as necessary.
For transfer case repairs, only use the defect codes related to VTG (Construction Group 27) when submitting claims for eligible
and covered repairs.
WARRANTY INFORMATION
Not applicable.
