Airbag control unit with part number 5QF959655M

What does the airbag control unit 5QF959655M do?

The 5QF959655M is the airbag control unit of the restraint system (SRS) of Seat. It continuously processes the measured values from the crash sensors and, in the event of an accident, determines within milliseconds which airbags and seatbelt pretensioners are triggered.

In addition, it monitors the system's other components and reports faults via the airbag warning light.

After an accident it creates crash data and then locks itself.

Why does the control unit 5QF959655M fail?

The most common cause is crash data from an accident, even when no airbag has fired; an ordinary diagnostic tool cannot reach it. Other causes are ageing electronics, cold solder joints, moisture and corrosion on plug connections, and voltage spikes.

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

A weak battery or a jump start can create voltage spikes that stress the electronics.

Ageing components and cold solder joints can also be causes. Which of these applies in the individual case only testing will show.

How can you tell that the 5QF959655M is defective?

Typical signs are an airbag warning light that stays on permanently or intermittently, along with an error message in the instrument cluster. In addition, a diagnostic tool gets no connection to the control unit, or the fault memory cannot be cleared.

These signs at a glance:

• Airbag warning light on permanently or intermittently
• Error message in the instrument cluster
• No connection from the diagnostic tool to the control unit
• Fault memory cannot be cleared

If any of these findings is present, airbags and seatbelt pretensioners may not deploy in an emergency. The indication is therefore a sign that calls for a check.

Which vehicles is the 5QF959655M fitted in?

The 5QF959655M is fitted in these vehicles: Seat Arona 1 Facelift (from 2021) and 1 (2017-2021); Seat Ibiza 5 [6F] (2017-2021) and 5 [6F] Facelift (from 2021).

We list the following vehicle types for this number:

• Seat Arona 1 Facelift (from 2021)
• Seat Arona 1 (2017-2021)
• Seat Ibiza 5 [6F] (2017-2021)
• Seat Ibiza 5 [6F] Facelift (from 2021)

You make the label comparison on the removed unit: if the number matches this page, it is the right unit. Whether the control unit itself is defective or a plug or cable causes the fault, however, is only clarified by the fault memory, which you should have read out beforehand.

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

How does the repair of the 5QF959655M work?

First have the fault memory read out and attach the log, then disconnect the battery and only then remove the control unit. Next, create a repair order online and send the well-packed unit in. Checking, repairing and testing at Airbag24 usually take 3–4 working days.

Airbag24 checks the unit on the test bench, replaces defective components, erases stored crash data and carries out a function test. Your own unit is then returned 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 5QF959655M get to Airbag24?

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

Put the printed repair order into the parcel and pack the control unit securely against impact.