Airbag control unit with part number 77960-3A0-A820-M2

What does the airbag control unit 77960-3A0-A820-M2 do?

The airbag control unit 77960-3A0-A820-M2 belongs to the restraint system (SRS) of Honda and evaluates the signals from the crash sensors. In an accident it decides within milliseconds on the triggering of airbags and seatbelt pretensioners. After an accident it stores crash data and locks itself.

The device also monitors the system continuously. If it finds a fault, it reports this via the airbag warning light in the instrument cluster.

A defect in the control unit therefore affects not just a single component but the function of the entire system.

Why does the control unit 77960-3A0-A820-M2 fail?

Crash data from an earlier accident, even without an airbag deploying, is the most common cause. Aged components, cold solder joints, moisture, corrosion and voltage spikes are also possible.

A standard diagnostic tool cannot erase the crash data. Airbag24 deletes it during the repair.

The other causes concern the condition of the electronics and the connections. Specifically:

• Aged electronic components
• Cold solder joints
• Moisture and corrosion at connectors
• Voltage spikes, for example from a weak battery or a jump start

How can you tell that the 77960-3A0-A820-M2 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently when the system detects a fault. A fault message may also appear in the instrument cluster at the same time.

In addition, a diagnostic tool gets no connection to the control unit, and the fault memory cannot be cleared. Such findings indicate a defect that should be checked.

In an emergency, airbags and seatbelt pretensioners may then not deploy, which is why the warning light must be taken seriously.

Which vehicles is the 77960-3A0-A820-M2 fitted in?

The control unit 77960-3A0-A820-M2 is fitted in these vehicles: Honda CR-V 6 (from 2022).

The list shows the vehicles that are assigned to this part number.

• Honda CR-V 6 (from 2022)

Comparing the part number on the label of the removed unit with this page only confirms the identity of the unit. Have the fault memory read out before removal, because only then can it be determined whether the control unit is defective or whether a connector or cable is causing the fault.

How does the repair of the 77960-3A0-A820-M2 work?

First have the fault memory read out and enclose the log, then disconnect the battery and remove the control unit. Then create a repair order online and send in the well-packed device. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 tests the device on the test bench, replaces defective components, deletes the stored crash data and carries out a function test. Afterwards the device 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 77960-3A0-A820-M2 get to Airbag24?

You send the device as a parcel to Airbag24, or you book a UPS collection for an extra charge. After the repair, your own unit comes back to you by UPS.

Enclose the printed repair order in the parcel, and pack the control unit shock-proof.