Airbag control unit with part number 2K5 959 655 C

What does the airbag control unit 2K5 959 655 C do?

The airbag control unit 2K5 959 655 C controls the restraint system (SRS) of Volkswagen. It reads the crash sensors, calculates in an accident within fractions of a second which airbags and seatbelt pretensioners fire, and checks the system continuously. Detected faults appear via the airbag warning light.

The unit evaluates the signals from several sensors and works without interruption. After an accident, it stores crash data and locks itself.

Why does the control unit 2K5 959 655 C fail?

The most common cause for the 2K5 959 655 C is crash data stored after an accident, even without a triggered airbag; a normal diagnostic tool cannot erase this data. Further causes include ageing electronic components, cold solder joints, moisture or corrosion on plugs, and voltage spikes, for example from a weak battery or a jump start.

An ordinary diagnostic tool cannot erase crash data. At Airbag24 the data is removed during the repair, before the unit is returned.

The other causes concern the electronics in everyday use. Components age, solder joints can become cold, and moisture attacks plug connections. Only the investigation shows which of these applies.

How can you tell that the 2K5 959 655 C is defective?

The airbag warning light, a fault message or a diagnostic tool without a connection to the 2K5 959 655 C indicate a problem. In an emergency, airbags and seatbelt pretensioners may then fail to trigger.

• The airbag warning light stays on permanently.
• The light appears only intermittently.
• A fault message is shown in the instrument cluster.
• The diagnostic tool cannot reach the control unit.
• The fault memory cannot be emptied.

Have the warning promptly checked by a specialist workshop, even if the car continues to drive normally.

Which vehicles is the 2K5 959 655 C fitted in?

The control unit 2K5 959 655 C is fitted in these vehicles: Volkswagen Caddy 2K (2003-2010), 2K Facelift (2010-2015) and SA (2015-2020).

The following models are assigned to the unit:

• Volkswagen Caddy 2K (2003-2010)
• Volkswagen Caddy 2K Facelift (2010-2015)
• Volkswagen Caddy SA (2015-2020)

First compare the label of the removed unit with this page to make sure it is the right unit. Then have the fault memory read out. Only this log shows whether the control unit itself 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 2K5959655A, 2K5959655B, 6Q0 909 605 AJ, 6Q0909605AH, 7E0 959 655 F, 7E0959655B.

How does the repair of the 2K5 959 655 C work?

First have the fault memory read out, enclose the log and disconnect the battery. Then remove the control unit 2K5 959 655 C, create the repair order online and send the unit in well packed. At Airbag24, checking, repairing and testing usually take 3–4 working days.

The sequence protects during dismantling. The control unit may only be removed once the battery is disconnected.

Airbag24 checks the unit on the test bench, repairs defective components where necessary, erases the stored crash data and carries out a function test. Afterwards, your own unit comes 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 2K5 959 655 C get to Airbag24?

Either you send the 2K5 959 655 C yourself as a parcel, or you book a UPS collection for an extra charge. The return after repair is made by UPS.

Put the printed repair order into the parcel. Pack the control unit shockproof before you hand it over.