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

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

The airbag control unit 77960-TEC-N810-M4 controls the restraint system (SRS) of Honda. It evaluates the crash sensors, decides in an accident within milliseconds on the triggering of airbags and seatbelt pretensioners, and monitors the system continuously.

The unit reports faults via the airbag warning light in the instrument cluster. To do this, it continuously checks the connections to the sensors, airbags and seatbelt pretensioners, so that the system is ready in an emergency.

After an accident, the control unit stores crash data and locks itself. The lock is only lifted by the repair, in which Airbag24 removes the data.

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

The most common cause is stored crash data after an accident, even if no airbag was triggered; a normal diagnostic tool cannot erase it. Other possible causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery or a jump start.

Crash data stays in the memory until it is specifically removed. For this reason, the fault memory keeps the entry even if the vehicle seems inconspicuous in everyday use.

The other causes can act over a longer period. Aged components lose function, and moisture corrodes the contacts.

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

A defect shows up as the airbag warning light, which lights up permanently or intermittently, and as a fault message in the instrument cluster. In addition, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared.

• airbag warning light on permanently or intermittently
• fault message in the instrument cluster
• no connection between the diagnostic tool and the control unit
• fault memory cannot be cleared

In an emergency, the airbags and seatbelt pretensioners may then fail to trigger. This applies for as long as the defect persists.

The warning light indicates the defect. Have the fault memory read out as soon as it comes on.

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

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

The list shows the vehicles that are stored for this part number.

• Honda Civic 10th generation (2015-2022)

Comparing the part number on the label of the removed unit with this page only ensures that it is the right 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-SMG-G014-M1, 77960-TBA-A01, 77960-TBA-A02, 77960-TBA-A03, 77960-TBA-A04, 77960-TBA-A05.

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

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

At Airbag24, the unit is checked on the test bench, defective components are replaced, the crash data is erased and a function test is carried out. Your unit then 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-TEC-N810-M4 get to Airbag24?

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

Put the printed repair order into the parcel and pack the unit shockproof.