Airbag control unit with part number 77960-TEA-T910-M4

What does the airbag control unit 77960-TEA-T910-M4 do?

The airbag control unit 77960-TEA-T910-M4 is the control unit of the restraint system (SRS) in Honda. It evaluates the crash sensors, decides in an accident within milliseconds whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously. It reports faults via the airbag warning light.

After an accident the unit stores crash data and is then locked.

As long as the system works without faults, you do not notice the control unit. It only draws attention when a fault exists.

Why does the control unit 77960-TEA-T910-M4 fail?

The most common cause is crash data from an earlier accident, even if no airbag has deployed. A normal diagnostic tool cannot erase it; Airbag24 removes it during the repair. Aged components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes come on top.

The crash data is created by the unit as soon as it registers an event. It remains in the memory until it is erased.

The other causes are ageing of the electronics and moisture or corrosion on the contacts. Strong voltage fluctuations, for example with a weak battery or jump-starting, can also come into question.

How can you tell that the 77960-TEA-T910-M4 is defective?

The airbag warning light lights up constantly or intermittently, a fault message appears, the diagnostic tool gets no connection to the control unit, or the fault memory cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then not deploy.

The warning light is the clearest signal the system gives. It shows the defect as soon as it is detected and should not be ignored.

A failed connection to the diagnostic tool is a further warning sign. A closer check of the cause should then follow.

Which vehicles is the 77960-TEA-T910-M4 fitted in?

The control unit 77960-TEA-T910-M4 is fitted in these vehicles: Honda Civic 10th generation (2015-2022).

The vehicles at a glance:

• Honda Civic 10th generation (2015-2022)

Compare the part number on the label of the removed unit with this page, and you know it is the right unit. Whether it is defective only becomes clear when the fault memory is read out. Have this done beforehand, because only then is it clear whether the control unit or 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-TEA-T910-M4 work?

At Airbag24, checking, repairing and the function test take 3–4 working days as a rule. You carry out the steps on the vehicle yourself beforehand, and they are not part of this time.

First have the fault memory read out and attach the log to the unit. Then disconnect the battery, only afterwards remove the control unit, and then create the repair order online and pack the unit well.

Airbag24 checks the unit on the test bench, replaces defective components, erases the stored crash data and carries out a function test. After that your own unit comes 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-TEA-T910-M4 get to Airbag24?

Sending takes place by parcel, or by a UPS collection that you book for an extra charge. After the repair the unit comes back by UPS.

Enclose the printed repair order in the parcel and pack the unit shock-proof, so it arrives protected.