Airbag control unit with part number 77960-TGG-Q810-M4

What does the airbag control unit 77960-TGG-Q810-M4 do?

The airbag control unit 77960-TGG-Q810-M4 controls the restraint system (SRS) for Honda. It monitors the crash sensors, decides within milliseconds in a crash whether airbags and seatbelt pretensioners are triggered, and checks the system continuously. It reports faults via the airbag warning light.

The monitoring runs in every driving situation, not only in a crash. The unit constantly compares the measured values as it does so.

After a crash, it creates crash data and locks itself.

Why does the control unit 77960-TGG-Q810-M4 fail?

Stored crash data is the most common cause, even when no airbag has deployed; an ordinary diagnostic tool cannot erase it. Aged electronic components, cold solder joints, moisture and corrosion on plug connectors, and voltage spikes are also possible causes.

Crash data records the event in the control unit, even if no external damage is visible on the vehicle.

The other causes lie in the electronics and the connections. Solder joints can stay cold, plugs absorb moisture, and voltage spikes, for example from a weak battery or a jump start, add further strain.

How can you tell that the 77960-TGG-Q810-M4 is defective?

The airbag warning light, a fault message in the instrument cluster and loss of connection to the diagnostic tool are signs of a defect. In that case, airbags and seatbelt pretensioners may fail to trigger in an emergency.

• The airbag warning light stays on permanently.
• It only lights up intermittently.
• The instrument cluster displays a fault message.
• The diagnostic tool cannot find the control unit.
• The fault memory persists and cannot be cleared.

A single one of these signs is enough reason for a check. Only the readout shows which cause lies behind it.

Which vehicles is the 77960-TGG-Q810-M4 fitted in?

The control unit 77960-TGG-Q810-M4 is fitted in these vehicles: Honda Civic 10th generation (2015-2022). What matters here is the assignment stored for this part number.

The following list shows where this number is stored.

• Honda Civic 10th generation (2015-2022)

Comparing the label with this page only confirms that the unit matches. Have the fault memory read out beforehand, because this log shows whether the control unit is defective or whether a plug or a 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-TGG-Q810-M4 work?

First have the fault memory read out and attach the log, then disconnect the battery and only then remove the control unit. Afterwards, you create a repair order online and the unit goes on its way, well packed. At Airbag24, processing usually takes 3–4 working days.

Only remove the unit once the battery is disconnected. Then pack the unit so that it survives transport well.

At Airbag24, the team checks the control unit on the test bench. Airbag24 replaces defective components, deletes stored crash data, and a function test concludes the work. Afterwards, your own unit is sent 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-TGG-Q810-M4 get to Airbag24?

You send the control unit in a parcel, or you may book a UPS collection for an extra charge. Airbag24 returns the repaired unit by UPS.

The printed repair order goes into the parcel, and the packaging protects the unit from knocks.