Airbag control unit with part number 77960-TF0-Z821-M3

What does the airbag control unit 77960-TF0-Z821-M3 do?

The airbag control unit 77960-TF0-Z821-M3 coordinates the restraint system of Honda. It receives the reports from the crash sensors and decides in an accident within milliseconds which airbags and seatbelt pretensioners are triggered.

In everyday use the unit checks all components continuously. It indicates any deviations via the airbag warning light.

After an accident it stores crash data and locks itself. Only the repair lifts this lock.

Why does the control unit 77960-TF0-Z821-M3 fail?

Crash data stored after an accident is the most common cause of the 77960-TF0-Z821-M3 failing, even if no airbag has been triggered. Aged electronic components, cold solder joints, moisture and corrosion on plug connectors, and voltage spikes can also come into question.

A normal diagnostic tool cannot erase the crash data. During the repair, Airbag24 clears it specifically, so that the unit works without burden again afterwards.

Voltage spikes occur, for example, with a weak battery or when jump starting. Moisture and corrosion gradually attack the plug connectors.

How can you tell that the 77960-TF0-Z821-M3 is defective?

The airbag warning light in the instrument cluster lights up constantly or intermittently when there is a fault on the 77960-TF0-Z821-M3. In addition there is an error message in the instrument cluster, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared.

As long as this condition persists, airbags and seatbelt pretensioners may possibly not deploy in an emergency. The warning light is a clear sign, and an inspection will establish its cause.

Which vehicles is the 77960-TF0-Z821-M3 fitted in?

The control unit 77960-TF0-Z821-M3 is fitted in these vehicles: Honda Jazz GE (2008-2015).

The following overview shows the vehicles in which this unit is registered.

• Honda Jazz GE (2008-2015)

Comparing the part number on the label with this page only ensures that you have the correct unit in front of you. Have the fault memory read out beforehand. Only that shows whether the control unit itself is the cause or a connector or cable triggers the fault.

For the same vehicles, we also repair control units with the part numbers 5WK43461, 77960-SAA-G821-M1, 77960-SEG-G821-M1, 77960-TF0-G820-M3, 77960-TF0-G821.

How does the repair of the 77960-TF0-Z821-M3 work?

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

Airbag24 checks the unit on the test bench, renews defective components, deletes the stored crash data and carries out a function test. Inspection, repair and function test take 3–4 working days at Airbag24 as a rule. 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-TF0-Z821-M3 get to Airbag24?

You send the control unit 77960-TF0-Z821-M3 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back via UPS.

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