Airbag control unit with part number 5QF959655AH

What does the airbag control unit 5QF959655AH do?

The airbag control unit 5QF959655AH is the central control unit of the restraint system (SRS) for Seat. It evaluates the signals from the crash sensors and, in an accident, decides within milliseconds which airbags and seatbelt pretensioners are triggered.

In addition, it monitors the entire system continuously. It reports faults via the airbag warning light in the instrument cluster.

After an accident, the unit stores crash data and locks itself. The event is recorded regardless of whether an airbag has been triggered.

Why does the control unit 5QF959655AH fail?

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

Crash data cannot be erased with a normal diagnostic tool. Airbag24 erases it during the repair.

Aged components and cold solder joints may not be visible from the outside. Moisture at plug connections and voltage spikes from a weak battery or a jump start are also possible causes.

How can you tell that the 5QF959655AH is defective?

A defect shows when the airbag warning light in the instrument cluster lights up permanently or intermittently, when a fault message appears, or when the diagnostic tool cannot connect to the control unit.

The airbag warning light in the instrument cluster lights up permanently or intermittently as soon as the system has found a fault. A fault message in the instrument cluster and a fault memory that cannot be erased also point to a defect.

As long as the fault persists, airbags and seatbelt pretensioners may not trigger in an emergency. Therefore have the control unit checked promptly.

Which vehicles is the 5QF959655AH fitted in?

The control unit 5QF959655AH is fitted in these vehicles: Seat Ibiza 5 [6F] (2017-2021) and 5 [6F] Facelift (from 2021). This information is based on our assignment for this part number.

The assignment lists these vehicles:

• Seat Ibiza 5 [6F] (2017-2021)
• Seat Ibiza 5 [6F] Facelift (from 2021)

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

For the same vehicles, we also repair control units with the part numbers 5QF 959 655 L, 5QF 959 655 N, 5QF959655AE, 5QF959655AG, 5QF959655AM, 5QF959655M.

How does the repair of the 5QF959655AH work?

You read out the fault memory of control unit 5QF959655AH and enclose the report, disconnect the battery and remove the unit. Then create a repair order online and send it in well packed. Processing at Airbag24 usually takes 3–4 working days.

The unit is removed only after the battery has been disconnected; this order is mandatory for safety reasons.

At Airbag24, the unit is examined on the test bench, defective components are replaced and a function test follows. The unit then returns to you. If you want the crash data erased, contact 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 5QF959655AH get to Airbag24?

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

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