Airbag control unit with part number 77960-T5A-Q820-M1

What does the airbag control unit 77960-T5A-Q820-M1 do?

The airbag control unit 77960-T5A-Q820-M1 is the central control unit of the restraint system (SRS) of Honda. It evaluates the signals from the crash sensors and decides in an accident which airbags and seatbelt pretensioners are triggered.

This decision is made within milliseconds. The control unit monitors the system continuously and reports faults via the airbag warning light.

After an accident it stores crash data and locks itself. The lock is only lifted by the repair.

Why does the control unit 77960-T5A-Q820-M1 fail?

The most common cause is crash data stored after an accident, even if no airbag was triggered. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery or jump-starting.

Crash data stays stored in the unit, and a normal diagnostic tool cannot erase it.

The other causes mainly act through the electronics. Aged components lose reliability, cold solder joints disturb the contact, and moisture promotes corrosion at the plug connections.

How can you tell that the 77960-T5A-Q820-M1 is defective?

Typical signs are an airbag warning light in the instrument cluster that stays on permanently or intermittently, a fault message, no connection between the diagnostic tool and the control unit, and a fault memory that cannot be cleared.

The warning light is the most important signal. As long as it is on, airbags and seatbelt pretensioners may not trigger in an emergency, so take it seriously.

Whether the control unit itself or its connection is behind this will only be established by the test.

Which vehicles is the 77960-T5A-Q820-M1 fitted in?

The 77960-T5A-Q820-M1 is fitted in these vehicles: Honda Jazz GK (2013-2023).

The following models are stored:

• Honda Jazz GK (2013-2023)

Compare the part number on the label of the removed unit with this page. This ensures you have the right unit in front of you. Also have the fault memory read out beforehand, because only this log shows whether the control unit is defective or a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 77960-SAA-F911-M1, 77960-SAA-G821-M1.

How does the repair of the 77960-T5A-Q820-M1 work?

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

This order of steps is for safety. The battery must be disconnected before you remove the control unit.

At Airbag24 the unit is examined on the test bench, defective components are repaired, crash data is erased and a function test is carried out. This part usually takes 3–4 working days. Afterwards your 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-T5A-Q820-M1 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.

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