1 - helical spring
2 - anti-roll bar
3 - differential
4 - beam
5 - shock absorber
6 - support
7 - trailing arm
8 - lower transverse lever
9 - upper transverse lever
10 - brake disc
The BMW 3 Series has independent suspension on each rear wheel with a central arm. Each rear wheel is guided by three levers: two transverse and one longitudinal. The wishbones are connected to the trailing arm and axle beam. The trailing arm is bolted through a rubber mount in front to the bottom of the body. A differential is fixed on the beam. All rear suspension elements have elastic and maintenance-free rubber mounts, which reduce the transmission of vibrations resulting from the influence of the road and the power unit to the cabin with passengers.
Suspension of the car is carried out by means of helical springs and shock absorbers. Stability of the car on turns is carried out by the anti-roll bar.
Torque from the engine and manual transmission is transmitted to the rear wheels through the driveshaft, differential and drive shafts.
It is not allowed to carry out welding and straightening work on the elements of the rear suspension. Self-locking nuts, as well as rusty bolts / nuts, must be replaced with new ones during repairs.