Airbag control unit with part number 77960-TA0-X031-M4

What does the airbag control unit 77960-TA0-X031-M4 do?

The airbag control unit 77960-TA0-X031-M4 is at Honda the central control unit of the restraint system (SRS). It evaluates the crash sensors, decides within milliseconds in an impact on the deployment of airbags and seatbelt pretensioners, and reports faults via the airbag warning light.

During operation, it monitors the system continuously and stores any faults it finds in the fault memory.

After an accident, the unit stores crash data and locks itself.

Why does the control unit 77960-TA0-X031-M4 fail?

Most often the cause is crash data stored after an accident, even without an airbag deployment. Aged electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes are also possible causes.

An ordinary diagnostic tool cannot remove the crash data. Airbag24 erases it during the repair.

The other causes concern the age of the components, the moisture in the vehicle and the on-board voltage. Jump-starting and weak batteries generate voltage spikes that can affect the electronics.

How can you tell that the 77960-TA0-X031-M4 is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently, an error message appears, the diagnostic tool finds no connection, and the fault memory cannot be erased. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

The warning light is the most important indication of a defect. When it lights up, have the system checked promptly rather than trusting that everything is fine.

Which vehicles is the 77960-TA0-X031-M4 fitted in?

The control unit 77960-TA0-X031-M4 is installed at Honda in these vehicles: Honda Accord 8th generation (2008-2015).

The models in which it is used:

• Honda Accord 8th generation (2008-2015)

Before removal, you should check two things. Matching the part number on the label with this page only confirms that it is the right unit. Also have the fault memory read out, because only this result shows whether the control unit is defective or a connector or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 77960-S84-A86, 77960-TA0-A01, 77960-TA0-A011M4, 77960-TA0-A02, 77960-TA0-L02.

How does the repair of the 77960-TA0-X031-M4 work?

First, have the fault memory read out and enclose the log. Then disconnect the battery, remove the control unit, create a repair order online and send the unit in well packed.

Airbag24 checks the unit on the test bench, replaces defective components, erases stored crash data and carries out a function test. Your own unit is then returned.

Processing at Airbag24 usually takes 3–4 working days. 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-TA0-X031-M4 get to Airbag24?

You send the unit in as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

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