Airbag control unit with part number 56D959655E

What does the airbag control unit 56D959655E do?

The airbag control unit 56D959655E evaluates the crash sensors in the restraint system (SRS) of Seat. In an emergency it decides within fractions of a second which airbags and seatbelt pretensioners trigger, and monitors the system continuously.

The unit reports faults via the airbag warning light in the instrument cluster. That light is therefore the most important signal you receive from the system.

After an accident it stores crash data and locks itself.

Why does the control unit 56D959655E fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed. Other causes are aged electronic components, cold solder joints, moisture at plug connections and voltage spikes.

A normal diagnostic tool cannot erase the crash data. Airbag24 does erase it during the repair.

Electronic components also age over time. Cold solder joints can cause faults just as moisture can, which acts through corrosion at plug connections.

Voltage spikes also count, for example when the battery is weak or a jump start was needed. Which cause applies in the individual case is shown by the examination.

How can you tell that the 56D959655E is defective?

A defect is recognised by the airbag warning light in the instrument cluster, which lights up permanently or intermittently. In addition there is a fault message in the instrument cluster, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared.

The warning light is therefore the signal you must heed, because it shows that something in the restraint system is wrong.

In an emergency, airbags and seatbelt pretensioners may therefore fail to deploy. A check of the system is advisable before you drive on.

Which vehicles is the 56D959655E fitted in?

The control unit 56D959655E is fitted in these vehicles: Seat Ibiza 4 [6J] Facelift (2012-2015), 4 [6J] (2008-2012) and 4 [6P] (2015-2017).

The list shows the vehicles recorded for this unit.

• Seat Ibiza 4 [6J] Facelift (2012-2015)
• Seat Ibiza 4 [6J] (2008-2012)
• Seat Ibiza 4 [6P] (2015-2017)

Compare the part number on the label of the removed unit with this page, so you can see that it is the right unit. Also have the fault memory read out beforehand, because only the log shows whether the control unit is defective or a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 6C0 959 655 J, 6C0959655L, 6R0 959 655 K, 6R0959655C.

How does the repair of the 56D959655E work?

First have the fault memory read out, attach the log, then disconnect the battery. Only then remove the control unit, create a repair order online and send the unit well packed. Processing at Airbag24 takes 3–4 working days as a rule.

Airbag24 checks the unit on the test bench, repairs defective components, deletes the stored crash data and finishes with a function test. Afterwards you receive your own unit back.

The 3–4 working days apply only to this work at Airbag24. 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 56D959655E get to Airbag24?

You bring the unit to Airbag24 by parcel, or have it collected by UPS for an extra charge. After the repair Airbag24 sends it back to you by UPS.

Put the printed repair order in the parcel and pack the control unit shock-resistant.