What is OEM number 8T0-959-792-N and which part does it identify?

OEM number 8T0-959-792-N identifies the door control unit for the Audi A4 B8 (8K2), the Audi A5 (8T3), and the Audi A5 Sportback (8TA). OEM stands for original equipment manufacturer. The unit sits in the right-hand front door and manages electrical door functions, including central locking and the power window. It is also known as the central locking control unit or comfort control module. The suffix letter N is a hardware or software revision, and the unit must match the revision on the original part. OEM number 8T0-959-792-N may fit additional vehicle models not listed here — always verify against the OEM number on your existing part.

Does OEM number 8T0-959-792-N fit my vehicle?

OEM number 8T0-959-792-N fits the Audi A4 B8 (8K2), built between 2007 and 2015. It also fits the Audi A5 (8T3), built between 2007 and 2012, and the Audi A5 Sportback (8TA), built between 2009 and 2012. Fitment covers the engines below.

• Audi A4 B8 (8K2), 2007-2015: 1.8 TFSI (CABA, CDHA), 2.0 TDI (CAGB, CJCB, CSUB), and 2.0 TFSI quattro (CDNC, CPMA).
• Audi A5 (8T3), 2007-2012: 2.0 TDI (CAHA) and 3.0 TDI quattro (CAPA, CCWA).
• Audi A5 Sportback (8TA), 2009-2012: 1.8 TFSI (CDHB) and 2.0 TDI (CAHA).

The engine does not appear to govern fitment, because the unit belongs to the door electrics rather than the drivetrain. Three variables do govern fitment:

• Door position: the base number 8T0 959 792 covers the right-hand front door only. The left-hand front door uses a separate 8T0 959 793 series number and must be ordered separately.
• Revision suffix: the N suffix must match the suffix printed on the original unit. Neighbouring suffixes of the same base number exist, and their application depends on the build date and the vehicle identification number (VIN).
• Body variant: the unit is listed for the saloon, coupe, and Sportback body styles. Right-hand-drive and left-hand-drive cars use the same door position naming, so check the original unit rather than the side of the car.

OEM number 8T0-959-792-N may fit additional vehicle models not listed here. Always verify by checking the OEM number printed on your existing part.

Fits: Audi A4 B8 (8K2) 2007-2015, Audi A5 (8T3) 2007-2012, and Audi A5 Sportback (8TA) 2009-2012; right-hand front door position only; revision suffix N must match the original unit; all listed engine codes.
Does not fit: left-hand front door (separate 8T0 959 793 series number); units with a different revision suffix unless the printed number matches.

How is OEM number 8T0-959-792-N installed?

Installation is a plug-in swap that may need coding or adaptation, because the unit communicates with the vehicle network. It requires a VAG-compatible diagnostic tool (for example VCDS or ODIS) to read the old unit's coding and write it to the new one where needed. Disconnect the battery before unplugging the connector. Without correct coding, the door functions may not respond, and fault codes may be stored in the vehicle network.

1. Read and record the coding of the original unit before removal.
2. Fit the unit and reconnect the connector firmly.
3. Apply the recorded coding or run the adaptation with the diagnostic tool.
4. Clear any stored fault codes in the door and comfort systems.
5. Test central locking, the power window, and the door lock indicator from both the key fob and the interior switches.

When should OEM number 8T0-959-792-N be replaced?

Replacement triggers

• The right-hand front power window stops responding to the switch.
• The right-hand front door fails to lock or unlock with the central locking.
• Central locking works from the key fob but not from the interior switches.
• The diagnostic tool stores a communication fault for the right-hand front door control unit.
• The window and lock faults persist after the switches, wiring, and door lock actuator have been checked and found sound.

We used AI to help write this text. We regularly check the information - but cannot guarantee that all data is accurate.