Airbag control unit with part number 5C0959655K

What does the airbag control unit 5C0959655K do?

The airbag control unit 5C0959655K coordinates the restraint system (SRS) of Volkswagen. Within milliseconds, after evaluating the sensors, it determines which airbags and seatbelt pretensioners deploy in an accident, and it monitors the system continuously.

If a fault occurs, the airbag warning light in the instrument cluster comes on. The light then indicates the state of the system.

After an accident the control unit stores crash data and locks itself. The lock only ends with the repair.

Why does the control unit 5C0959655K fail?

The most common cause for 5C0959655K lies in crash data from an earlier accident, even if no airbag has deployed. Other possible causes are aged components, corrosion, moisture and voltage spikes.

Airbag24 erases crash data during the repair. A normal diagnostic tool, on the other hand, cannot erase it.

Further causes may also come into consideration:

• aged electronic components
• cold solder joints
• moisture and corrosion at plug connections
• voltage spikes, for example from a weak battery or a jump start

Which of these causes applies in an individual case is only shown by the inspection.

How can you tell that the 5C0959655K is defective?

A defect in the 5C0959655K shows itself through the airbag warning light, which stays on continuously or intermittently, an error message in the instrument cluster, no contact with the diagnostic tool, and a fault memory that cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then not be able to deploy.

The light and the message on the display show you that the system has found a fault. The light indicates the condition during driving and should therefore be taken seriously.

That the fault memory cannot be emptied points to a fault that needs further checking.

Which vehicles is the 5C0959655K fitted in?

The airbag control unit 5C0959655K is fitted in these vehicles: Volkswagen Jetta 6 (2010-2018).

For clarity, here is a list of the vehicles recorded for this number.

• Volkswagen Jetta 6 (2010-2018)

Matching the part number on the label of the removed unit ensures you have the right unit in front of you. Whether the control unit itself is defective is only shown by the fault memory, which you have read out beforehand. It also decides whether a plug or cable is responsible.

For the same vehicles, we also repair control units with the part numbers 5C0 959 655C, 5C0959655E, 5C0959655F, 5N0 959 655 AC 702.

How does the repair of the 5C0959655K work?

First have the fault memory of the 5C0959655K read out and attach the log to the unit. Only after disconnecting the battery do you remove the control unit, and then send it in with the online repair order, well packed. Processing at Airbag24 usually takes 3–4 working days.

On the test bench, Airbag24 examines the control unit and replaces defective components. Afterwards crash data is erased, and a function test follows before your own unit is returned 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 5C0959655K get to Airbag24?

The unit goes to Airbag24 as a parcel, or you book a UPS collection for an extra charge. The control unit goes back to you by UPS after the repair.

Place the printed repair order on top in the parcel. Pack the control unit shock-resistant so that it arrives undamaged.