All posts tagged: 5F3A

X3 and X5 BMW Transfer Case Actuator Gear Replacement DIY

This one little gear will save you over $4,000 USD The BMW X3 and X5 are known for their incredible x-drive all wheel drive systems that power through stormy winter conditions and keep you safe on the road. They’re also known for being incredibly robust, rarely having any major failure of the transfer case systems, as they are typically overbuilt by design. The X5’s ATC 500 transfer case is particularly robust. However, one small detail was overlooked on the design by BMW mechanical engineers: the small plastic gear inside the transfer case actuator motor. This small gear typically fails between 90,000 -120,000 miles in the X3 and X5. When it does fail, it throws the car’s computer systems into disarray and will show the trifecta of lights: Brake, ABS, and 4×4 DSC lights will all illuminate on the gauge cluster. Perhaps this is a planned failure, kind of like BMW’s version of planned obsolescence. If millions of X3 and X5 suffer this failure, that means millions of new reasons for customers to either pay heavily …