Airbag control unit with part number 77960-T7S-W810-M2

What does the airbag control unit 77960-T7S-W810-M2 do?

The airbag control unit 77960-T7S-W810-M2 is the control unit of the restraint system (SRS) for Honda. It evaluates the signals from the crash sensors, determines within milliseconds in a crash which airbags and seatbelt pretensioners are triggered, and monitors the system permanently.

It reports faults via the airbag warning light. After a crash it stores crash data and locks itself.

While driving, the control unit constantly checks whether sensors, wiring and seatbelt pretensioners are properly connected.

Why does the control unit 77960-T7S-W810-M2 fail?

The cause with the 77960-T7S-W810-M2 is most often crash data from an accident, even if no airbag has deployed; a normal diagnostic tool does not erase it. Aged electronic components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes, for example from a weak battery or jump-starting, are also possible.

Stored crash data does not disappear on its own but remains in the unit, even if there is no visible damage to the vehicle. The other causes concern the electronics themselves or their connections to other components.

How can you tell that the 77960-T7S-W810-M2 is defective?

A defect shows itself through the airbag warning light, which lights up permanently or intermittently, and through a fault message in the instrument cluster. The diagnostic tool receives no connection to the control unit, and the fault memory cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then not deploy.

The airbag warning light in the instrument cluster is the clearest signal here. It indicates that the system has detected a fault and calls for the fault memory to be examined promptly.

Which vehicles is the 77960-T7S-W810-M2 fitted in?

The airbag control unit 77960-T7S-W810-M2 is fitted in these vehicles: Honda HR-V 2nd generation (2015-2022).

The following overview lists the vehicles with this unit.

• Honda HR-V 2nd generation (2015-2022)

A comparison of the part number on the label of the removed unit with this page only confirms that you have the right unit. Have the fault memory read out beforehand. Only this log shows whether the control unit is defective or a connector or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 77960-3V0-A81, 77960-T7S-A21, 77960-T7S-A212-M2, 77960T7SK410M2.

How does the repair of the 77960-T7S-W810-M2 work?

First have the fault memory read out and attach the log. Then disconnect the battery and only then remove the control unit 77960-T7S-W810-M2. Next, create a repair order online and send the unit in well packed.

Airbag24 checks the unit on the test bench, repairs defective components, erases stored crash data and carries out a functional test. Processing at Airbag24 usually takes 3–4 working days, after which the unit goes 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-T7S-W810-M2 get to Airbag24?

Either you send the control unit 77960-T7S-W810-M2 as a parcel, or you book a UPS collection for an extra charge. After the repair, the unit comes back to you by UPS.

Put the printed repair order in the parcel, and the unit must be packed shockproof.