24 34 564 Replacing mechatronics (GA8HP45Z)

WARNING: This page is about a different variant/trim than selected.

Special tools required:

IMPORTANT:

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

NOTE: After completing repair work:

Load specific data status with the BMW diagnosis system

IMPORTANT: In vehicles with AutomaticStart/Stop , an oil reservoir is installed in the mechatronics.
After completion of repair work, CHECK TRANSMISSION OIL LEVEL .
Use only approved gearbox oil .
Failure to comply with this requirement will result in serious damage to the automatic transmission!

IMPORTANT: Read and comply with notes on protection against damage from electrostatic discharge (ESD protection) .

Necessary preliminary tasks:

Remove TRANSMISSION OIL SUMP .
Remove oil reservoir.

IMPORTANT: Mechatronics can be destroyed by static discharges. Therefore the contacts inside the connector must not be touched. Insert special tool immediately after operation.

Unscrew connector (1) and disconnect.

Fig 1: Disconnecting Connector

Insert special tool 24 2 390 in sealing cup (1).

Fig 2: Inserting Special Tool (24 2 390) In Sealing Cup

Release screw (1) and unlock sealing cup with slide (2).

Tightening torque 24 30 4AZ .

Fig 3: Releasing Sealing Cup

Note position of sealing cup.

Pull out sealing cup (1).

Installation note:

Replace sealing sleeve.

Fit sealing cup in position (lug on inside). Turn until lug engages in groove of transmission. Slide in sealing cup.

Lug on sealing cup must not be damaged!

Fig 4: Pulling Out Sealing Cup

IMPORTANT: Only for vehicles without oil reservoir.

Release all screws (1 and 2).

1 = M6 x 59 mm
2 = M6 x 20 mm

Remove mechatronics.

Installation note:

Replace all screws (1 and 2).

Replace O-rings for oil ducts on the mechatronics unit and wet with automatic transmission fluid.

Fig 5: Identifying Mechatronics Screws

Installation note:

Replace gasket (1).

Coat new gasket with automatic transmission fluid and install.

Fig 6: Identifying Automatic Transmission Gasket

IMPORTANT: Only for vehicles with oil reservoir.

Release all screws (1 and 2).

1 = M6 x 59 mm
2 = M6 x 20 mm

Carefully remove mechatronics.

Installation note:

Replace all screws (1 and 2).

Replace O-rings for oil ducts on the mechatronics unit and wet with automatic transmission fluid.

Fig 7: Identifying Mechatronics Unit Screws

Screw in guide pins 24 1 430 at screw position 4 and 9.

Fig 8: Identifying Guide Pins (24 1 430)

Fit mechatronics unit.

Fit shift claw (2) in gearshift shaft (3) by pressing release lever (1).

Fig 9: Installing Shift Claw Into Gearshift Shaft

Screw down wing nuts as far as they will go on to the mechatronics unit (1).

Fig 10: Installing Mechatronics Unit Nuts Using Special Tool (24 1 430)

Observe different screw lengths.

Failure to comply with this requirement will result in serious damage to the automatic transmission!

Installation note:

Insert screws 8 and 14 until screw heads make contact.

Remove guide pins and fit remaining screws.

Tighten screws in sequence 1....18.

Tightening torque 24 30 4AZ .

Fig 11: Automatic Transmission Valve Body (Mechatronics) Screws Tightening/Loosening Sequence

IMPORTANT: In vehicles with an oil reservoir, the screw 17 (M6 x 59 mm) must be secured with the oil reservoir .
Tighten in the order of 1...16 and 18.
Tightening torque 24 30 4AZ .

Installation note:

Install oil reservoir if necessary.