Airbag control unit with part number 77960-3A2-A810-M2

What does the airbag control unit 77960-3A2-A810-M2 do?

The airbag control unit 77960-3A2-A810-M2 controls the restraint system (SRS) of Honda. It checks the signals from the crash sensors and determines in an accident which airbags and seatbelt pretensioners fire.

During operation, it monitors the function of the system. Every detected fault is reported via the airbag warning light in the instrument cluster.

After an accident, it stores crash data and locks itself. The lock is lifted only by the repair.

Why does the control unit 77960-3A2-A810-M2 fail?

For the 77960-3A2-A810-M2, stored crash data from an accident is the most common cause, even if no airbag has deployed. A standard diagnostic tool cannot erase it. Aged components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes can also cause the failure.

Erasing the crash data is part of the repair at Airbag24 and not part of the diagnosis you can carry out yourself.

Which further cause applies can only be reliably determined by examining the unit. Weak batteries and jump-starting are considered typical triggers for voltage spikes.

How can you tell that the 77960-3A2-A810-M2 is defective?

A defect in the 77960-3A2-A810-M2 shows itself when the airbag warning light in the instrument cluster lights up permanently or intermittently. Added to this are an error message, a diagnostic tool without a connection to the control unit, and a fault memory that cannot be cleared.

This warning concerns the safety of the entire system and must therefore be taken seriously. The light is not decoration but a direct finding from the control unit.

If the airbags and seatbelt pretensioners are not functional, they may fail to deploy in an emergency. Have the finding clarified promptly.

Which vehicles is the 77960-3A2-A810-M2 fitted in?

The 77960-3A2-A810-M2 is fitted in these vehicles: Honda Civic 10th generation (2015-2022).

You will find the list of vehicles for this unit here:

• Honda Civic 10th generation (2015-2022)

Compare the part number on the label of the removed unit with this page. This only shows that it is the right unit. Have the fault memory read out beforehand, because it clarifies whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 77960-SMG-G014-M1, 77960-TBA-A01, 77960-TBA-A02, 77960-TBA-A03, 77960-TBA-A04, 77960-TBA-A05.

How does the repair of the 77960-3A2-A810-M2 work?

First, read out the fault memory and attach the log. Then disconnect the battery and only then remove the control unit. Next, create a repair order online and pack the unit well before sending it in.

Airbag24 checks the unit on the test bench, repairs defective components, erases the crash data and carries out a function test. Processing at Airbag24 usually takes 3–4 working days. Your own unit then comes back 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 77960-3A2-A810-M2 get to Airbag24?

You send the control unit 77960-3A2-A810-M2 as a parcel, or book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

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