Airbag control unit with part number 77960-3D5-A810-M2

What does the airbag control unit 77960-3D5-A810-M2 do?

The airbag control unit 77960-3D5-A810-M2 is the control centre of the restraint system (SRS) of Honda. It checks the signals from the crash sensors, decides in an accident within milliseconds on the triggering of airbags and seatbelt pretensioners, and monitors the system continuously. After an accident it stores crash data and locks itself.

The unit reports a fault via the airbag warning light in the instrument cluster. So that the restraint system works reliably in an emergency, it checks wiring and output stages without interruption.

Why does the control unit 77960-3D5-A810-M2 fail?

The most common cause is crash data stored after an accident, even when no airbag has deployed. A normal diagnostic tool cannot delete them. Aged electronics, cold solder joints, moisture at plug connectors and voltage spikes are also possible causes.

Crash data remain in the memory after an accident, even if the airbag did not fire. With this unit, Airbag24 deletes them as part of the repair.

The electronics themselves also play a role. Components age, solder joints can be cold, and moisture or corrosion at plugs disturbs the connection.

Voltage spikes can also be a cause, for example with a weakened battery or after jump-starting.

How can you tell that the 77960-3D5-A810-M2 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, and a fault message appears in the instrument cluster. In addition, the diagnostic tool cannot reach the control unit, and the fault memory cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then not trigger.

The warning light is the first indication you will notice, and it shows the defect directly.

If it lights up only intermittently, this is to be taken just as seriously as permanent light, because the system is not working properly even then.

Which vehicles is the 77960-3D5-A810-M2 fitted in?

The 77960-3D5-A810-M2 is fitted in the following vehicles: Honda CR-V 6 (from 2022).

In detail, these are the vehicles as our data record them.

• Honda CR-V 6 (from 2022)

Two separate steps are important. The first is comparing the part number on the label of the unit with this page, which only establishes whether it is the correct unit. The second is reading out the fault memory beforehand; it shows whether the control unit is defective or whether a plug or cable is causing the fault.

How does the repair of the 77960-3D5-A810-M2 work?

You read out the fault memory first, disconnect the battery and only then remove the control unit; the log belongs with the parcel. Afterwards you create the repair order online and send the unit in well packed. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit, repairs defective components, deletes the crash data and carries out a function test. These steps form the core of the work.

Safety comes first, which is why removal follows only after disconnecting the battery. The function test completes the work, after which your own unit 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 77960-3D5-A810-M2 get to Airbag24?

The unit goes to Airbag24 as a parcel, or you book a UPS collection for an extra charge. Airbag24 sends it back by UPS after the repair.

The printed repair order goes into the box, and the packaging must be shock-resistant so that knocks cannot harm the unit.