Airbag control unit with part number 77960-TEA-Y430-M4

What does the airbag control unit 77960-TEA-Y430-M4 do?

The airbag control unit 77960-TEA-Y430-M4 is the SRS control unit of Honda. It evaluates crash sensors, selects within milliseconds in an accident which airbags and seatbelt pretensioners fire, and monitors the restraint system continuously.

Irregularities are reported by the unit via the airbag warning light in the instrument cluster.

After an accident, it stores crash data and then locks itself.

Why does the control unit 77960-TEA-Y430-M4 fail?

The most common cause is crash data from an accident, even if no airbag has deployed; it cannot be removed with normal diagnostic tools. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

The crash data remains in the control unit until it is erased. Airbag24 handles this during the repair.

• Ageing of electronic components
• Cold solder joints
• Moisture and corrosion at plug connections
• Voltage spikes, for example from a weak battery or jump-starting

How can you tell that the 77960-TEA-Y430-M4 is defective?

A permanent or intermittent glow of the airbag warning light in the instrument cluster is among the signs. Added to this are a fault message in the instrument cluster, a diagnostic tool without connection and a fault memory that cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

The warning light in the instrument cluster is a clear sign, and you should not ignore it.

A diagnostic tool that cannot establish a connection is a further indication of a defect.

Which vehicles is the 77960-TEA-Y430-M4 fitted in?

The airbag control unit 77960-TEA-Y430-M4 is fitted in these vehicles: Honda Civic 10th generation (2015-2022).

The list below shows which vehicles belong to this part number.

• Honda Civic 10th generation (2015-2022)

Comparing the part number on the label with this page confirms that the unit is the correct one. Whether the control unit itself is defective or whether a plug or cable is the cause can only be shown by the fault memory, which you should have read out beforehand.

For the same vehicles, we also repair control units with the part numbers 77960-SMG-G014-M1, 77960-TBA-A01, 77960-TBA-A02, 77960-TBA-A03, 77960-TBA-A04, 77960-TBA-A05.

How does the repair of the 77960-TEA-Y430-M4 work?

Order of steps for safety reasons: have the fault memory read out and enclose the log, disconnect the battery, and only then remove the control unit 77960-TEA-Y430-M4. Airbag24 requires 3–4 working days as a rule for checking, repairing and testing.

Then you create a repair order online and send the unit in well packed. On the test bench, Airbag24 checks the unit, repairs defective components, erases the 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-TEA-Y430-M4 get to Airbag24?

You can send your 77960-TEA-Y430-M4 in as a parcel or book a UPS collection for an extra charge. Airbag24 sends it back to you by UPS after the repair.

A shockproof-packed unit goes into the parcel together with the printed repair order.