Airbag control unit with part number 77960-TEA-U830-M4

What does the airbag control unit 77960-TEA-U830-M4 do?

The airbag control unit 77960-TEA-U830-M4 is the control unit of the restraint system (SRS) in Honda. It evaluates the crash sensors, determines in an accident within milliseconds the triggering of airbags and seatbelt pretensioners, and shows faults via the airbag warning light.

While driving, the unit checks the entire system, which includes sensors, airbags and seatbelt pretensioners.

After an accident it stores crash data and locks itself. The lock ends only with the repair.

Why does the control unit 77960-TEA-U830-M4 fail?

The main causes are crash data that stays stored after an accident, even without a triggered airbag. A normal diagnostic tool cannot remove it. Also possible are ageing components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Crash data is one of the causes that can only be remedied through the repair. Airbag24 erases it during processing.

The other causes can lie in the electronics. Ageing weakens components, cold solder joints disturb the connection, and moisture and corrosion let contacts fail. Voltage spikes, for example during a jump-start, add further strain.

How can you tell that the 77960-TEA-U830-M4 is defective?

A defect in the 77960-TEA-U830-M4 is first noticed through the airbag warning light, which stays on permanently or intermittently. Fault messages, a disturbed access by the diagnostic tool and a fault memory that cannot be cleared are added. In an emergency, airbags and seatbelt pretensioners may not fire.

The airbag warning light in the instrument cluster delivers the most important feedback. It lights up as soon as the system has detected a fault.

A diagnostic tool that cannot establish a connection, or a fault memory that remains despite an attempt to clear it, confirms the suspicion. Then an examination is advisable.

Which vehicles is the 77960-TEA-U830-M4 fitted in?

The airbag control unit 77960-TEA-U830-M4 is fitted in these vehicles: Honda Civic 10th generation (2015-2022).

The overview covers the vehicles of Honda in which this part number was installed.

• Honda Civic 10th generation (2015-2022)

Comparing the part number on the label of the removed unit with this page makes sure that you have the right unit. Having the fault memory read out before removal clarifies whether the control unit itself 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-U830-M4 work?

First have the fault memory read out and enclose the log. Then disconnect the battery and only then remove the control unit 77960-TEA-U830-M4. Afterwards create the repair order online and send the well-packed unit in. Processing at Airbag24 takes 3–4 working days as a rule.

At Airbag24 the unit is examined on the test bench, defective components are replaced and the crash data is erased. A function test follows.

The 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-TEA-U830-M4 get to Airbag24?

You can send the 77960-TEA-U830-M4 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it by UPS.

The printed repair order goes into the parcel. Pack the unit so that it travels without damage.