Airbag control unit with part number 77960-SDR-A012-M4

What does the airbag control unit 77960-SDR-A012-M4 do?

The control unit 77960-SDR-A012-M4 is the airbag control unit of the restraint system (SRS) for Honda. It evaluates the crash sensors, determines within milliseconds in a collision which airbags and seatbelt pretensioners are triggered, and monitors the system without interruption. After an accident it stores crash data and locks itself.

If it detects a fault, it indicates this via the airbag warning light in the instrument cluster, so that the driver is informed.

The entire system depends on this evaluation, which is why a fault affects the whole system.

Why does the control unit 77960-SDR-A012-M4 fail?

Stored crash data is the most common cause of the 77960-SDR-A012-M4 failing, even if no airbag was triggered in the accident. Standard diagnostic tools cannot erase it, and the fault persists.

Airbag24 deletes this crash data during the repair. Other factors also play a role, such as aged electronic components, cold solder joints, moisture and corrosion at plug connections, or voltage spikes, as occur with a weak battery or jump starting.

How can you tell that the 77960-SDR-A012-M4 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently when something is wrong with the 77960-SDR-A012-M4. An error message may also appear, the diagnostic tool may be unable to connect, and the fault memory cannot be cleared.

As long as these signs persist, airbags and seatbelt pretensioners may fail to deploy in an emergency. This applies regardless of how inconspicuously the vehicle behaves day to day.

Therefore, have the system checked early rather than hoping the warning will disappear.

Which vehicles is the 77960-SDR-A012-M4 fitted in?

The part number 77960-SDR-A012-M4 belongs to a unit built for Honda. It is fitted in these vehicles: Honda Accord 7th generation (2002-2008).

The vehicles are listed clearly below one another:

• Honda Accord 7th generation (2002-2008)

Before removing the control unit from the car, have the fault memory read out. That shows whether this unit is really defective, or whether a plug or cable causes the indications.

Then carry out the comparison of the part number on the label with 77960-SDR-A012-M4.

For the same vehicles, we also repair control units with the part numbers 77960-SDA-306, 77960-SDN-C211-M1, 77960-SDR-A021-M4.

How does the repair of the 77960-SDR-A012-M4 work?

Before removal, have the fault memory prepared as a log. After disconnecting the battery, remove the control unit 77960-SDR-A012-M4 and create a repair order online. Then pack the unit and send it to Airbag24.

Airbag24 examines the unit on the test bench, repairs defective components, deletes the stored crash data and carries out a function test. Your own unit is then sent back to you. Airbag24 typically plans 3–4 working days for this work.

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 77960-SDR-A012-M4 get to Airbag24?

Your control unit 77960-SDR-A012-M4 reaches Airbag24 either as a parcel or by a UPS collection booked for an extra charge. After the repair, Airbag24 returns the unit to you by UPS.

Shockproof packaging and the printed repair order in the parcel are important here.