The automatic transmission control unit (often designated as TCU or TCM) is a crucial electronic component responsible for smooth and trouble-free gear shifting. Its failure, most often caused by overheating, short circuits, or water damage, results in jerking, an inability to shift gears, or the vehicle entering limp mode. Purchasing a new module at an authorized dealership is a massive expense, which is why replacing it with a fully functional, used original is the most reasonable solution.
Rear differential control unit Audi RS4 RS5 Continental 5WK11731 8K0907163A
Vendors's code: 5WK11731
Product code: 8K0907163A
Barcode:
Code 39:
ISBN:
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Where is the number 8K0907163A on the control unit housing?
Used, working Continental rear differential control unit 5WK11731 (Audi number 8K0907163A) for Audi RS4 and RS5. It is not an engine control unit – match it by the numbers on the housing.
Rear differential control unit 8K0907163A – Audi RS4 RS5
In part listings and catalogues, the number 8K0907163A describes a rear differential control unit (in German catalogues: Hinterachsgetriebe) used in the Audi RS4 (8K) and RS5 (8T). We offer a used, working Continental 5WK11731 unit.
Part numbers to compare
- 5WK11731 – Manufacturer part number (Continental)
- 8K0 907 163 A / 8K0907163A – Audi number (OEM)
The label on the housing usually shows the manufacturer’s number and the Audi number. If one of them is 5WK11731 or 8K0907163A, the part is the right one; send us a photo of the label or your VIN if in doubt.
What is this control unit for?
The unit controls the rear differential and communicates with the other modules of the car. It does not control the engine, so it cannot replace an engine control unit.
When does the control unit start causing trouble?
A faulty unit may show up as drivetrain fault messages, warning lights on the instrument cluster or no communication with diagnostics. Before replacing it, check the power supply, grounds, fuses and wiring – the cause is not always the unit itself.
Questions about this control unit
| Is 5WK11731 the same as 8K0907163A? | They are two numbers of the same part: 5WK11731 was assigned by the manufacturer (Continental), while 8K0907163A is the Audi number. One of them is enough for comparison. |
| Does the control unit need coding after replacement? | Usually yes – the unit works together with the other modules and the vehicle, so it often needs matching. Ask before buying if in doubt. |
| Is this control unit new? | No, it is a used part removed from a vehicle, working and in good condition. |
Questions, or want to confirm the fit? Write to contact@auto24parts.com. See also: other control units for Audi.