Airbag control unit with part number 77960-SZT-J820-M2

What does the airbag control unit 77960-SZT-J820-M2 do?

The airbag control unit 77960-SZT-J820-M2 controls the restraint system (SRS) of Honda. It evaluates the crash sensors and decides within milliseconds which airbags and seatbelt pretensioners are triggered. After an accident it stores crash data and locks itself.

It checks the system without interruption and indicates faults via the airbag warning light in the instrument cluster.

Why does the control unit 77960-SZT-J820-M2 fail?

The most common cause is crash data from an accident, even if no airbag was triggered. Other causes include aging electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Crash data remains stored, because a standard diagnostic tool does not remove it. The other causes are due to aging and environmental influences, for example moisture in the contacts.

Voltage spikes can also load the electronics, for example with a weak battery or a jump start. Airbag24 erases the crash data during the repair.

How can you tell that the 77960-SZT-J820-M2 is defective?

If the 77960-SZT-J820-M2 is defective, the airbag warning light in the instrument cluster lights up either permanently or intermittently. In addition, an error message appears, the diagnostic tool gets no connection to the control unit, and the fault memory cannot be cleared.

A disturbed system can mean that airbags and seatbelt pretensioners may not trigger in an emergency. For this reason too, the warning light is a serious signal that you should not ignore.

Which vehicles is the 77960-SZT-J820-M2 fitted in?

The airbag control unit 77960-SZT-J820-M2 is fitted in these vehicles: Honda CR-Z ZF1 (2010-2016). With this overview you can easily check whether your car is on the list.

The allocation of vehicles:

• Honda CR-Z ZF1 (2010-2016)

When removing the unit, compare the part number on the label with this page. This only shows that the unit is the right one. Have the fault memory read out beforehand, because only the result shows whether the control unit itself is defective or whether a connector or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 77960-SZT-A011, 77960-SZT-A011-M2.

How does the repair of the 77960-SZT-J820-M2 work?

First have the fault memory read out and enclose the log. Then disconnect the battery and only afterwards remove the control unit 77960-SZT-J820-M2. Then create a repair order online and send in the well-packed unit. Testing, repair and the function test at Airbag24 take 3–4 working days as a rule.

Airbag24 checks the unit on the test bench, repairs defective components, erases the crash data and carries out a function test. Then your own 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-SZT-J820-M2 get to Airbag24?

You can send the control unit 77960-SZT-J820-M2 in as a package or book a UPS collection for an extra charge. Airbag24 sends it back to you via UPS after the repair.

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