Haldex Coupling Pump Failure
ModerateGearbox & TransmissionThe Haldex AWD coupling pump becomes clogged with sludge or its pressure sensor fails, disabling the 4WD system and triggering traction warnings.
"Traction Reduced" message, Traction control warning light, Front wheels spinning on wet surfaces
- Haldex oil change history (every 40k miles)
- AWD operation test
- Stored fault codes