BMW G-Series Automatic

We offer plug and play harnesses for G series cars.

You can also connect the TCU without this harness directly to the harness in a car factory-equipped with an automatic gearbox.

Wiring : #

1. In the engine bay on right side shock tower (looking from bumper) there is a plug that needs to be disconnected and rewired to the TCU

Rewire it according to this schematic (pin numbers are on the image above):

Gearbox plug in the car TCU plug Description
3, 5 67, 69 CAN 1H\CAN 2H (connect together)
4, 6 66, 68 CAN 1L\CAN 2L (connect together)
9 1-3, 43-45 TCU and power GND
10 51-53 +12V Battery

Ignition 12V must be picked up from other place as stock TCU wakes up by CAN signal.

TunerPro configuration #

Start by reading about Tuner Pro setup

Set CAN1 and CAN2 to 36 and set paddles1 to 13(OEM can paddles)

Updated on April 7, 2026