Airbag control unit with part number 6RD959655A

What does the airbag control unit 6RD959655A do?

The airbag control unit 6RD959655A is the central control unit of the restraint system (SRS) in Skoda vehicles. It evaluates the crash sensors, decides in an accident within milliseconds whether to trigger the airbags and seatbelt pretensioners, and checks the system continuously.

The unit reports faults via the airbag warning light in the instrument cluster. In addition, after an accident it stores crash data and locks itself.

This lock is part of the system's function and is not a sign that the unit itself is damaged.

Why does the control unit 6RD959655A fail?

Stored crash data after an accident is the most common cause, even if no airbag has deployed, and a normal diagnostic tool cannot erase it. Ageing components, cold solder joints, moisture and corrosion at plugs, as well as voltage spikes from the vehicle electrical system, are also possible causes.

After an accident, crash data is saved in the unit without the airbags having to fire. The diagnostic tool cannot remove it, and that is precisely why fault finding can remain cumbersome.

Electronic components age, and over time solder joints can go cold. Moisture and corrosion at plug connections additionally disturb signal transmission.

Voltage spikes act directly on the electronics, for example when the battery is weak or the vehicle is started with jump leads.

How can you tell that the 6RD959655A is defective?

A defect shows up as the airbag warning light in the instrument cluster lighting up permanently or intermittently, and as a fault message in the display. The diagnostic tool then does not connect to the control unit, and the fault memory cannot be cleared.

The warning light shows the defect without any test being needed. Anyone who sees it can therefore react straight away.

If the diagnostic tool cannot establish a connection, or the fault memory stays full despite an attempt to clear it, there is a problem that you should not ignore. In an emergency, airbags and seatbelt pretensioners may then not be able to deploy.

Which vehicles is the 6RD959655A fitted in?

The 6RD959655A is fitted in these vehicles: Skoda Fabia 2 [5J] (2007-2010) and 2 [5J] Facelift (2010-2014).

The vehicles from the stored data are listed here:

• Skoda Fabia 2 [5J] (2007-2010)
• Skoda Fabia 2 [5J] Facelift (2010-2014)

Compare the part number on the label of the removed unit with this page. This only ensures that you have the right unit in front of you. Have the fault memory read out beforehand, because only this result shows whether the control unit itself is the cause or a plug or cable.

For the same vehicles, we also repair control units with the part numbers 1C0 909 605 F, 1C0 909 605 K, 5WK43125, 5WK43131, 6R0 959 655 K.

How does the repair of the 6RD959655A work?

First have the fault memory read out and enclose the log with the order. Then disconnect the battery, remove the control unit and create a repair order online. Airbag24 checks, repairs and tests it within 3–4 working days as a rule.

The order protects you: the control unit is only removed from the vehicle once the battery is disconnected. Then pack it well and send it in.

At Airbag24 the unit is examined on the test bench, defective components are replaced and stored crash data is erased. A function test follows before your own unit goes 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 6RD959655A get to Airbag24?

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

Place the printed repair order in the parcel and pack the control unit shockproof so that it is not damaged on the way.