Airbag control unit with part number 77960-TGB-H050-M4

What does the airbag control unit 77960-TGB-H050-M4 do?

The airbag control unit 77960-TGB-H050-M4 forms the central control unit in the restraint system (SRS) of Honda. In an accident it evaluates the crash sensors and determines within milliseconds which airbags and seatbelt pretensioners are triggered. In addition, it monitors the entire system.

The unit shows faults via the airbag warning light in the instrument cluster. After an accident it stores crash data and locks itself.

The sensors report their measured values continuously, and the control unit evaluates them without interruption.

Why does the control unit 77960-TGB-H050-M4 fail?

The most common cause is crash data stored after an accident, even when no airbag has deployed. A normal diagnostic tool cannot erase it. Further causes are ageing of the electronics, cold solder joints, moisture and voltage spikes.

Airbag24 erases the crash data during the repair, so this step is firmly part of the process.

Ageing and moisture act gradually on the electronics. Voltage spikes arise, for example, from a weak battery or from jump-starting, and corrosion at plug connections disturbs the contacts.

How can you tell that the 77960-TGB-H050-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 finds no connection to the control unit, and the fault memory cannot be cleared.

With these signs, airbags and seatbelt pretensioners may not deploy in an emergency. Take the warning light seriously and have the system checked promptly.

Which vehicles is the 77960-TGB-H050-M4 fitted in?

The control unit 77960-TGB-H050-M4 is fitted in these vehicles: Honda Civic 10th generation (2015-2022).

Here you can see the vehicles known to us for this unit:

• Honda Civic 10th generation (2015-2022)

First compare the part number on the label of the removed unit with this page; then you know it is the correct unit. This comparison does not reveal the cause. Have the fault memory read out beforehand, because only that log 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-TGB-H050-M4 work?

First have the fault memory read out and attach the log, then disconnect the battery and only then remove the control unit. Online, create a repair order and pack the unit well. Airbag24 needs 3–4 working days for checking, repair and function test in the usual case.

Then create the online repair order, safely pack the unit in the box and send it in.

Airbag24 checks your unit on the test bench, repairs the defective components, deletes the stored crash data and carries out a function test. At the end you receive your own unit back.

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-TGB-H050-M4 get to Airbag24?

You send the unit as a parcel to Airbag24, or you book a UPS collection for an extra charge. After the repair, Airbag24 sends the control unit 77960-TGB-H050-M4 back to you by UPS.

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