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Home >> BMW >> 2015 >> Z4 sDrive28i, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (Dual-Clutch Automatic Transmission - Repair (N54) -- Z4_E89) >> Double Clutch Transmission Control Unit >> 28 60 025 Replacing O-ring for wiring harness (GS7D36SG)

28 60 025 Replacing O-ring for wiring harness (GS7D36SG)

WARNING: This page is about a different variant/trim than selected.
IMPORTANT: After completion of repair work, check TRANSMISSION OIL LEVEL .

Use only the approved TRANSMISSION OIL .

Failure to comply with this instruction will result in serious damage to the twin-clutch gearbox.

IMPORTANT: Read and comply with notes on PROTECTION AGAINST ELECTROSTATIC DISCHARGE (ESD PROTECTION) .

Necessary preliminary tasks: 

Transmission must be cleaned around the sealing cup to prevent dirt penetration.

Failure to comply with this instruction may result in serious damage to the twin-clutch gearbox! 

Release screw (1).

Fig 1: Identifying Sealing Cup Screw
G11150734Courtesy of BMW OF NORTH AMERICA, INC.

Pull out sealing cup (1).

Remove sealing ring (2).

Clean sealing cup (1).

IMPORTANT: Risk of damage!

Pull out sealing cup only up to first edge (broken line).

Fig 2: Pulling Out Sealing Cup
G11150735Courtesy of BMW OF NORTH AMERICA, INC.

Attach new sealing ring (1) to sealing cup.

Carefully pull sealing ring over screwing flange and install.

IMPORTANT: Inside and outside of sealing ring (1) have sealing lips of different heights (2).

The higher sealing lips must point outwards (rest on the transmission housing in the preinstalled state).

Fig 3: Attaching Sealing Ring To Sealing Cup
G11150736Courtesy of BMW OF NORTH AMERICA, INC.