Airbag control unit with part number 5WA959655B

What does the airbag control unit 5WA959655B do?

The airbag control unit 5WA959655B is the central control unit of the restraint system (SRS) for Volkswagen. It evaluates the crash sensors, decides within a fraction of a second in the event of an accident which airbags and seatbelt pretensioners are triggered, and monitors the system continuously. It reports faults via the airbag warning light.

After an accident, the unit stores crash data and locks itself. The monitoring runs unobtrusively in the background during everyday driving.

Why does the control unit 5WA959655B fail?

Stored crash data is most often the cause, even if no airbag has been triggered after an accident; other causes can be aged components, cold solder joints, moisture, corrosion and voltage spikes. With this control unit, the crash data often cannot be deleted. If you would like the crash data deleted, get in touch with Airbag24 briefly before sending the unit in.

The crash data remains stored in the unit after an accident, even if no airbag has deployed. The other causes concern the electronics and the connections. Aged components and cold solder joints, as well as moisture and corrosion at plug connections, can cause the failure, and voltage spikes, for example from a weak battery or a jump start, are also among them. Only the fault memory shows which cause applies.

How can you tell that the 5WA959655B is defective?

The airbag warning light in the instrument cluster lights up continuously or intermittently and so shows the defect. Fault messages in the instrument cluster accompany it, along with a diagnostic tool without a connection to the control unit and a fault memory that cannot be deleted.

In an emergency, the airbags and seatbelt pretensioners may then not trigger. An intermittent fault is just as important as one that is shown constantly. Take the warning seriously and have the system checked.

Which vehicles is the 5WA959655B fitted in?

The control unit 5WA959655B is fitted in these vehicles: Volkswagen Golf GTI Mk8; Volkswagen Golf Variant 8. Whether your own unit fits is shown by comparing the part number on the label.

The following vehicles are listed individually:

• Volkswagen Golf GTI Mk8
• Volkswagen Golf Variant 8

Compare the part number on the label of the removed unit with this page. This only confirms that it is the correct unit. Also have the fault memory read out before removing anything, as only that shows whether the control unit is defective or whether a plug or a cable is the cause.

For the same vehicles, we also repair control units with the part numbers 5WA959655A, 5WA959655H, 5WA959655J, A3C1066800.

How does the repair of the 5WA959655B work?

At the start, the fault memory is read out and the log is enclosed. Then disconnect the battery and only then remove the control unit; next, create a repair order online and send the unit in. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, repairs defective components and carries out a function test. Your own unit is then returned to you. If you would like the crash data deleted, get in touch with Airbag24 briefly before sending the unit in.

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 5WA959655B get to Airbag24?

You send the unit in as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it by UPS.

Put the printed repair order into the parcel and pack the unit shockproof.