Checking/topping up the oil level in the automatic transmission

Preliminary work

Refer to REMOVING REAR UNDERBODY PROTECTION .

Precondition

Vehicle in horizontal position.

The vehicle is secured against rolling away.

CAUTION: Materials harmful to health.
Contact with fluids harmful to health!

Note and follow safety instructions on containers.
Conduct all work in appropriate personal protective equipment only.

NOTE: TECHNICAL INFORMATION
To set the oil level correctly, the service function "Gearbox control: oil level adjustment" must be carried out using the diagnostic system.

NOTE: TECHNICAL INFORMATION
Carry out an oil-level adjustment:
An oil-level adjustment is required when there are certain fault memory entries in the automatic transmission and after a repair has been carried out (e.g. replacement of the mechatronics, replacement of the converter, replacement of the transmission, automatic transmission fluid service).

NOTE: TECHNICAL INFORMATION
The automatic transmission fluid specified by BMW must be used for the automatic transmission. Refer to the "Fluid Capacities" tab for the selected vehicle.

Connect diagnostic system.
Observe the predefined transmission oil temperatures for the oil-level adjustment with the diagnostic system:
- Initial condition: Transmission oil temperature 30°C to 40°C.
- End condition: Transmission oil temperature 40°C to 50°C.
Call up service function (drive).
Carry out oil-level adjustment in accordance with instructions.
Loosen the oil filler plug (1) using the special tool 2 405 614 .
Top up automatic transmission fluid according to the instructions in the diagnostic system.

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: TECHNICAL INFORMATION
The setpoint torque deviates from the adjustable torque when using special tool 2 405 614 .
Convert setpoint torque into adjustable torque:
(setpoint torque x L1): L2 =adjustable torque

L1 = length from the center of the grip to the reversible ratchet head

L2 = length from the center of the grip up to the insertion of the special tool in the screw

Courtesy of BMW OF NORTH AMERICA, INC.

Replace the oil filler plug (1) and the sealing ring.
Parts: Oil filler plug, sealing ring
Make sure that the special tool 2 405 614 and the torque wrench (2) align while tightening the oil filler plug (1) .
Tighten the oil filler plug (1) with the special tool 2 405 614 and the torque wrench (2) .

Courtesy of BMW OF NORTH AMERICA, INC.

Follow-up work

Refer to INSTALLING UNDERBODY PROTECTION AT REAR .