Airbag control unit with part number 77960-S84-A81-M1

What does the airbag control unit 77960-S84-A81-M1 do?

The airbag control unit 77960-S84-A81-M1 coordinates the restraint system (SRS) for Honda. It checks the signals from the crash sensors, decides within milliseconds in an emergency whether airbags and seatbelt pretensioners are triggered, and shows faults on the airbag warning light.

While driving and at standstill, the unit monitors the wiring and the sensors. It detects deviations early enough for the system to remain ready for operation.

After an accident, the control unit stores crash data and locks itself. The repair is the only way to lift this lock.

Why does the control unit 77960-S84-A81-M1 fail?

Stored crash data after an accident is the most common cause with the 77960-S84-A81-M1, even if no airbag was triggered. Other causes are aged electronics, cold solder joints, moisture and corrosion at plugs, and voltage spikes.

Crash data cannot be erased with a normal diagnostic tool, which is exactly why reading out the fault memory alone does not help. Airbag24 removes the data during the repair.

The other causes concern the electronics themselves. Components can age, solder joints can go cold, and moisture or corrosion can affect plug connections. A weak battery or a jump start can cause voltage spikes that stress the unit.

How can you tell that the 77960-S84-A81-M1 is defective?

A defect on the 77960-S84-A81-M1 is indicated by the airbag warning light in the instrument cluster, which lights up permanently or intermittently. In addition, a fault message appears in the instrument cluster, and the diagnostic tool gets no connection to the control unit.

If the fault memory cannot be cleared, this additionally confirms the suspicion. If the control unit is defective, the airbags and seatbelt pretensioners may fail to trigger in an emergency, which is why the warning should not be ignored.

Which vehicles is the 77960-S84-A81-M1 fitted in?

The 77960-S84-A81-M1 is fitted in these vehicles: Honda Accord 6th generation (1998-2002).

The following list shows the vehicles in which this control unit was installed.

• Honda Accord 6th generation (1998-2002)

Compare the number on the label of the removed unit with 77960-S84-A81-M1 on this page, so that you can be sure you have the right unit. Then have the fault memory read out. Only the log shows whether the control unit itself 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-SEA-G815-M1, C0W6K4VDA.

How does the repair of the 77960-S84-A81-M1 work?

First you read out the fault memory and enclose the log. Then you disconnect the battery and only then remove the control unit. Online, you create a repair order and send in the well-packed unit.

Airbag24 checks the unit on the test bench, repairs defective components, erases the stored crash data and carries out a function test. Processing usually takes 3–4 working days. Afterwards, the unit is returned 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-S84-A81-M1 get to Airbag24?

You send in the control unit 77960-S84-A81-M1 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.