Airbag control unit with part number 77960-T2A-A013-M4

What does the airbag control unit 77960-T2A-A013-M4 do?

The airbag control unit 77960-T2A-A013-M4 is the central unit of the SRS restraint system for Honda. It evaluates crash sensors, determines in an accident which airbags and seatbelt pretensioners trigger, and monitors everything permanently.

This determination is made within milliseconds. If the control unit detects a fault, it shows this via the airbag warning light.

After an accident it stores crash data and remains locked.

Why does the control unit 77960-T2A-A013-M4 fail?

The most common cause is crash data from an accident, even if no airbag was triggered. In addition, aged components, cold solder joints, moisture at plug connections and voltage spikes can cause the fault.

For crash data a standard diagnostic tool is not sufficient; the data remains stored.

Other causes include:

• wear and ageing of the electronics
• cold solder joints in the unit
• moisture and corrosion at the plugs
• voltage spikes from a weak battery or jump-starting

How can you tell that the 77960-T2A-A013-M4 is defective?

A defect shows up at the airbag warning light, which stays on permanently or intermittently, at fault messages in the instrument cluster, at a missing connection to the diagnostic tool and at a fault memory that cannot be cleared.

A warning light that no longer goes out is a clear sign that something is wrong in the system. Then airbags and seatbelt pretensioners may not trigger in an emergency.

Which component is affected cannot be said without an examination.

Which vehicles is the 77960-T2A-A013-M4 fitted in?

The 77960-T2A-A013-M4 is fitted in these vehicles: Honda Accord 9th generation (2012-2019).

The models at a glance:

• Honda Accord 9th generation (2012-2019)

Comparing the part number on the label of the removed unit with this page only tells you about the identity of the unit. Whether the control unit is defective or a cable is the cause is shown only by the fault memory read out beforehand.

For the same vehicles, we also repair control units with the part numbers 77960-SEA-G815-M1, 77960-T3L-A012-M1, C0W6K4VDA.

How does the repair of the 77960-T2A-A013-M4 work?

You start by having the fault memory read out and enclose the log. Then disconnect the battery, remove the control unit and create the repair order online. The processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit, repairs defective components, erases crash data and carries out a function test.

Afterwards your own unit 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-T2A-A013-M4 get to Airbag24?

You send the unit as a parcel to Airbag24 or book a UPS collection for an extra charge. After the repair the return to you also runs via UPS.

Pack the printed repair order into the parcel and pack the unit shock-proof.