Airbag control unit with part number 5N0959655K

What does the airbag control unit 5N0959655K do?

The airbag control unit 5N0959655K is the central control unit of the SRS for Volkswagen. It evaluates the signals of the crash sensors, decides in an accident within milliseconds on airbags and seatbelt pretensioners, and monitors the system continuously. After an accident it stores crash data and locks itself.

Faults are shown via the airbag warning light in the instrument cluster.

Why does the control unit 5N0959655K fail?

Stored crash data after an accident is the most common cause, even if no airbag has deployed; a normal diagnostic tool cannot erase it. Further causes on the 5N0959655K are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes. Airbag24 erases the crash data during the repair.

An accident does not have to have led to an airbag deployment for data to be stored in the control unit.

The remaining causes lie in the electronics and their connections. Components age, solder joints can be cold, and moisture attacks plug contacts; voltage spikes additionally stress the electronics.

How can you tell that the 5N0959655K is defective?

A defect on the 5N0959655K shows through the airbag warning light in the instrument cluster, through fault messages and through a missing connection to the diagnostic tool. Then airbags and seatbelt pretensioners may fail to deploy in an emergency.

The signs in detail:

• Airbag warning light in the instrument cluster, permanently or intermittently
• Fault message in the instrument cluster
• No connection of the diagnostic tool to the control unit
• Fault memory that cannot be cleared

If these signs appear, have the system checked promptly.

Which vehicles is the 5N0959655K fitted in?

This control unit 5N0959655K is fitted in these vehicles: Volkswagen Tiguan 5N Facelift (2011-2018) and 5N (2007-2011). Only the models known to us for this number are listed here.

The models belonging to this number are:

• Volkswagen Tiguan 5N Facelift (2011-2018)
• Volkswagen Tiguan 5N (2007-2011)

Comparing the part number on the label with this page only confirms that you have the right unit. Whether a fault lies in the control unit or in a connector or cable is shown only by the fault memory, which you should have read out beforehand.

For the same vehicles, we also repair control units with the part numbers 5N0 959 655 AA, 5N0 959 655 AB 005, 5N0 959 655 AE, 5N0 959 655 J, 5N0 959 655 Q, 5N0 959 655 R.

How does the repair of the 5N0959655K work?

First read out the fault memory and enclose the log, then disconnect the battery and only then remove the 5N0959655K. Afterwards create a repair order online and send in the well-packed unit. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, repairs defective components, erases stored crash data and carries out a function test. Your own unit is then sent back to you.

Our repairs come with 2 years' statutory liability for defects. The repaired control unit comes back with all vehicle data and is ready for use as soon as it is refitted — no coding or programming is required.

How does the control unit 5N0959655K get to Airbag24?

You send the control unit 5N0959655K as a parcel or book a UPS collection for an extra charge. Airbag24 hands it back to you by UPS after the repair.

The printed repair order goes into the parcel, and the unit is packed shockproof.