Airbag control unit with part number 77960-TGH-N810-M4

What does the airbag control unit 77960-TGH-N810-M4 do?

The airbag control unit 77960-TGH-N810-M4 coordinates the restraint system (SRS) in Honda. It constantly monitors the crash sensors, decides within milliseconds in an accident whether airbags and seatbelt pretensioners are triggered, and reports faults via the airbag warning light.

After an accident, the unit stores crash data and locks itself.

The control unit works in the background for as long as the vehicle is powered up.

Why does the control unit 77960-TGH-N810-M4 fail?

The most common cause is crash data left behind by an accident, even without an airbag deployment. Other causes include aged components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

A standard diagnostic tool cannot remove this data. The following causes are possible:

• ageing of electronic components
• cold solder joints
• moisture and corrosion at plug connections
• voltage spikes, for example from a weak battery or a jump start

Only an inspection shows which cause is actually present. Airbag24 deletes the crash data during the repair.

How can you tell that the 77960-TGH-N810-M4 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, and a fault message appears in the instrument cluster. The diagnostic tool then cannot establish a connection to the control unit, and the fault memory cannot be cleared.

While this condition persists, airbags and seatbelt pretensioners may fail to deploy in an emergency. Even an intermittent light is a reason to have the system checked.

The light is a warning and not a cosmetic issue, so it deserves prompt attention.

Which vehicles is the 77960-TGH-N810-M4 fitted in?

The control unit 77960-TGH-N810-M4 is fitted in these vehicles: Honda Civic 10th generation (2015-2022).

The list of assigned models follows.

• Honda Civic 10th generation (2015-2022)

Comparing the part number on the removed unit with this page only confirms that it is the correct unit. Have the fault memory read out beforehand, because only it shows 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 77960-3A2-A810-M2, 77960-3A2-A820-M2, 77960-3A2-A830-M2, 77960-TBA-A01, 77960-TBA-A02, 77960-TBA-A03.

How does the repair of the 77960-TGH-N810-M4 work?

Processing at Airbag24 usually takes 3–4 working days. Before sending, you read out the fault memory, disconnect the battery, remove the unit and create the repair order online.

Airbag24 tests the unit on the test bench, replaces defective components, deletes the stored crash data and carries out a function test. Your own unit is then returned to you.

The 3–4 working days apply only to inspection, repair and function testing. 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-TGH-N810-M4 get to Airbag24?

You send the unit as a parcel or book UPS collection for an extra charge. After the repair, Airbag24 returns the unit to you by UPS.

Packed securely against shocks, the control unit goes on its way with the printed repair order in the parcel.