Airbag control unit with part number 1EA 959 655 DP

What does the airbag control unit 1EA 959 655 DP do?

The airbag control unit 1EA 959 655 DP is the control unit of the restraint system (SRS) of Cupra. It evaluates the crash sensors, determines in a crash within milliseconds which airbags and seatbelt pretensioners are triggered, and monitors the entire system. After an accident, it stores crash data and locks itself.

If it detects a fault, it enters it in the fault memory and reports it via the airbag warning light in the instrument cluster.

The lock is only lifted by the repair.

Why does the control unit 1EA 959 655 DP fail?

The most common cause of a failure of the 1EA 959 655 DP is crash data stored after an accident, even without a triggered airbag. Further causes are aged electronic components, moisture and corrosion on plug connections, and voltage spikes, for example from jump-starting.

Crash data remains stored after an accident, even if no airbag has triggered. It cannot be removed with a standard diagnostic tool; Airbag24 erases it during the repair.

Aged electronic components, cold solder joints and moisture and corrosion on plug connections also play a role. Voltage spikes additionally stress the electronics.

On control units with a 1EA part number, such an internal defect cannot be repaired. For these units, Airbag24 offers only the erasure of stored crash data.

How can you tell that the 1EA 959 655 DP is defective?

You recognise a defect on the 1EA 959 655 DP by the airbag warning light, which lights up permanently or intermittently, by a fault message in the instrument cluster, by a missing connection between the diagnostic tool and the control unit, or by a fault memory that cannot be erased.

Start with the airbag warning light in the instrument cluster. It indicates faults as soon as it stays on permanently or lights up intermittently. Fault messages in the instrument cluster may add to this and make the finding clear.

A diagnostic tool that cannot connect to the control unit, and a fault memory that cannot be emptied, are further indications. In an emergency, airbags and seatbelt pretensioners may then fail to trigger.

Which vehicles is the 1EA 959 655 DP fitted in?

The 1EA 959 655 DP is fitted in these vehicles: Cupra Formentor KM (2020-2024) and KM Facelift (from 2024).

The assignment of the vehicles is shown in this list:

• Cupra Formentor KM (2020-2024)
• Cupra Formentor KM Facelift (from 2024)

Comparing the part number on the label with this page confirms that it is the correct unit, nothing more. Therefore have the fault memory read out beforehand, because only the log shows whether the control unit is defective or whether a plug or cable is the cause. If B2000 ("control unit defective") appears, no repair is possible, and you do not send the unit in.

For the same vehicles, we also repair control units with the part numbers 1EA 959 655 BJ, 1EA 959 655 ED, 1EA 959 655 EP, 1EA 959 655 FD.

How does the repair of the 1EA 959 655 DP work?

First have the fault memory read out and enclose the log, then disconnect the battery and only then remove the control unit 1EA 959 655 DP. Next, create a repair order online and send the unit in. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, erases the stored crash data and carries out a function test. Afterwards your own unit comes back to you.

If fault B2000 is stored, no repair is possible for control units with a 1EA part number.

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 1EA 959 655 DP get to Airbag24?

You send the control unit 1EA 959 655 DP to Airbag24 as a parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 returns the unit by UPS.

The printed repair order goes into the parcel, and the unit is packed shockproof.