Let`s find your car
Browse by car body
ABD - Automatic Braking Differential
The Automatic Braking Differential (ABD) system was co-developed by Bosch and Porsche in order to counteract unnecessary wheel spin by one of the driving wheels. In essence, ABD is an electronic locking differential that uses the brakes and inputs from the Anti-lock Braking System sensors to simulate "the lock" of one of the wheels in case of hard acceleration or during a high-speed maneuver.
On most car models, the ABD does not substitute for a real locking differential, but is a supplementary system which provides better directional stability and more traction on less-than-ideal road surfaces by applying braking power to any slipping wheel during acceleration.