BMW X3 Service & Repair Manual: Installing exchange transmission (GA8HP45Z) (N20)

BMW X3 Service & Repair Manual / Transmission / Transmission in general / Installing exchange transmission (GA8HP45Z) (N20)


  • Do not let skin come in contact with transmission oil and do not inhale fuel vapors.
  • Wear protective gloves.
  • Ensure adequate ventilation.

Drain automatic transmission fluid at oil drain plug.

IMPORTANT: After completion of work, program control transmission control unit.


Catch and dispose of escaping transmission oil.

Observe country-specific waste disposal regulations.


  • Before installing exchange transmission, always flush TRANSMISSION OIL COOLER TOGETHER WITH LINES .
  • After completion of work, CHECK TRANSMISSION OIL LEVEL .
  • Use only approved TRANSMISSION OIL .

    Failure to comply with this requirement will result in serious damage to the automatic transmission Exchange transmissions come filled with oil

Necessary preliminary tasks:

  • Modify TRANSFER CASE .

Modify transportation retainers.

Convert all cable clips.

Convert all seal plugs.

Convert protective cap on output shaft.

IMPORTANT: After removing transportation retainer, secure torque converter against slipping out.

Transmission identification:

  • On type plate





Complete transmission, transmission oil change, transmission designations

    Installing exchange transmission (GA8HP45Z) (N52, N55, N47)
    IMPORTANT: Do not let skin come in contact with transmission oil and do not inhale transmission oil vapors. Wear protective gloves. ...

    Removing and installing automatic transmission (GA8HP45Z) (N20)
    Special tools required: 2 222 741 24 2 390 23 4 050 00 2 030 IMPORTANT: To prevent heavy damage to the engine block, the protruding ...

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