BMW M Performance Limited Slip Differential (LSD) - BMW M135i | M140i | M235i | M240i | 340i | 440i MANUALThe BMW M Performance limited slip differential is a mechanical rear axle differential which prevents slip when one of the wheels has low traction. The limited slip differential ensures that the wheel receives more torque from improved traction. The M Performance limited slip differential thus improves traction and ensures more controlled and precise handling in borderline driving situations. A real highlight for challenging and sporty driving