Airbag control unit with part number 77960-TA0-A040-M4

What does the airbag control unit 77960-TA0-A040-M4 do?

The airbag control unit 77960-TA0-A040-M4 is the central control unit of the restraint system (SRS) of Honda. It evaluates the crash sensors and decides in a crash, within milliseconds, which airbags and seatbelt pretensioners trigger.

During operation the unit monitors the system continuously. It shows faults via the airbag warning light in the instrument cluster.

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

Why does the control unit 77960-TA0-A040-M4 fail?

The most common cause is crash data stored after an accident, even without an airbag having deployed, and it cannot be erased with a normal diagnostic tool.

Airbag24 erases this crash data during the repair. A diagnostic tool alone cannot do that.

Other causes at a glance:

• aged 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-TA0-A040-M4 is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently, and an error message appears there. In addition, no connection to the diagnostic tool can be established, and the fault memory cannot be cleared.

The airbag warning light shows the defect immediately, before it becomes relevant in an emergency. The airbags and seatbelt pretensioners may then not deploy, so the check should not be postponed.

Which vehicles is the 77960-TA0-A040-M4 fitted in?

The control unit 77960-TA0-A040-M4 is fitted in these Honda vehicles: Honda Accord 8th generation (2008-2015). Comparing the part number shows whether the unit belongs to your own car.

The following list names vehicles with this control unit.

• Honda Accord 8th generation (2008-2015)

Compare the part number on the label of the removed unit with this page. That only confirms that it is the correct unit. Have the fault memory read out before removal. Only this result shows whether the control unit is defective or whether a connector or a 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-A040-M4 work?

First have the fault memory read out and attach the log. Then disconnect the battery and only afterwards remove the control unit. Online you create the repair order and send the unit in well packed.

Airbag24 checks the unit on the test bench and repairs defective components. The stored crash data is erased, and a function test follows. Processing at Airbag24 usually takes 3–4 working days. Afterwards Airbag24 sends your own unit 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-TA0-A040-M4 get to Airbag24?

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

Put the printed repair order into the parcel and pack the unit shock-resistant.