Airbag control unit with part number 77960-SJA-A050-M2

What does the airbag control unit 77960-SJA-A050-M2 do?

In the vehicle, the airbag control unit 77960-SJA-A050-M2 coordinates the restraint system (SRS) of Honda. From the signals of the crash sensors, it calculates within milliseconds whether and which airbags and seatbelt pretensioners are triggered. It monitors the system constantly and shows faults via the airbag warning light.

After an accident, the unit stores crash data and locks itself, and only the repair lifts this lock.

In everyday terms, this means the electronics check themselves in the background without you having to do anything.

Why does the control unit 77960-SJA-A050-M2 fail?

Stored crash data after an accident is the most common cause, even if no airbag has deployed. Aged components, cold solder joints, moisture at plug connections and voltage spikes can also contribute.

Crash data cannot be erased with an ordinary diagnostic tool. Airbag24 removes it during the repair.

Other causes at a glance:

• ageing electronic components
• cold solder joints
• moisture and corrosion at plug connections
• voltage spikes, for example from a weak battery or a jump start

How can you tell that the 77960-SJA-A050-M2 is defective?

The airbag warning light in the instrument cluster stays on permanently or lights up intermittently. An error message may also appear, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared. In such cases, airbags and seatbelt pretensioners may fail to deploy in an emergency.

The control unit turns on the light as soon as it detects an irregularity in the system. So do not ignore the light.

Which vehicles is the 77960-SJA-A050-M2 fitted in?

The airbag control unit 77960-SJA-A050-M2 is fitted in these vehicles: Honda Legend 4th generation (2004-2012).

These vehicles are listed for the part number:

• Honda Legend 4th generation (2004-2012)

Compare the part number on the label of the unit with this page so that you remove the right unit. Have the fault memory read out beforehand. Only the 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-S3V-C11, 77960-SJV-A94, 77960-SWV-A94.

How does the repair of the 77960-SJA-A050-M2 work?

The repair of the 77960-SJA-A050-M2 starts with having the fault memory read out and enclosing the log. Then disconnect the battery, and only then remove the control unit. Next, create a repair order online and send the well-packed unit in.

At Airbag24, the unit is checked on the test bench. Defective components are replaced, the crash data is erased, and a function test follows. Processing usually takes 3–4 working days.

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-SJA-A050-M2 get to Airbag24?

You send the control unit 77960-SJA-A050-M2 as a parcel, or you book a UPS collection for an extra charge. Airbag24 returns it by UPS after the repair.

Enclose the printed repair order and pack the unit shockproof.