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86 10... Removing and installing or replacing left or right coil spring

Release screw (1) and remove, tilt shock absorber (2) in direction of arrow towards rear.

Installation: 

Use new self-locking nut.

Hold shock absorber vertically and protective cap points upwards. Completely press in shock absorber once and pull out up to required installation length. Do not tilt shock absorber further than is needed for installation.

Tightening Torque,

refer to 86 10 21AZ

Fig 1: Tilting Shock Absorber Toward Rear
G04766350Courtesy of BMW OF NORTH AMERICA, INC.

The trailing arm folds down once the coil spring on the arm has been released.

No persons should be located underneath trailing arm. Risk of injury!

Release screw (1) between trailing arm (2) and coil spring.

Installation: 

Tightening Torque,

refer to 86 10 22AZ

Fig 2: Identifying Trailing Arm With Screws
G04766351Courtesy of BMW OF NORTH AMERICA, INC.

Remove pressure plate (1) from coil spring (2).

Installation: 

Use pressure plate with nut.

Fit pressure plate (1) according to its shape (3) into pressure spring (2).

Fig 3: Identifying Coil Spring With Pressure Plate
G04766352Courtesy of BMW OF NORTH AMERICA, INC.

Release screw (1) between coil spring (2) and longitudinal member (3). Remove small pressure plate (4) and large pressure plate (5).

Installation: 

Use pressure plate without nut.

Fit small pressure plate (4) according to its shape (6) into pressure spring (2).

Tightening Torque,

refer to 86 10 23AZ

Fig 4: Identifying Longitudinal Member, Coil Spring With Small And Large Pressure Plate And Screws
G04766353Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Two persons are needed to install the coil spring correctly. One person presses down the pressure plate (2) seated inside the coil spring (1) and tightens the coil spring (1)/trailing arm (3) screw connection. At the same time, the second person levers the coil spring (1) with a screwdriver into its correct seat.

Tightening Torque for coil spring (1)/trailing arm (3),

refer to 86 10 22AZ

Fig 5: Tightening Coil Spring/Trailing Arm Screw Connection
G04766354Courtesy of BMW OF NORTH AMERICA, INC.