Airbag control unit with part number 77960-TLA-R030-M4

What does the airbag control unit 77960-TLA-R030-M4 do?

The airbag control unit 77960-TLA-R030-M4 coordinates the restraint system (SRS) of Honda. It reads the crash sensors, selects the suitable airbags and seatbelt pretensioners within milliseconds in an accident, and monitors the system constantly.

If it detects a fault, it reports it via the airbag warning light. After an accident it stores crash data and then locks itself.

Why does the control unit 77960-TLA-R030-M4 fail?

The unit can fail because of crash data stored after an accident, even if no airbag has deployed. Ageing electronics, cold solder joints, moisture at the plugs and voltage spikes add to this.

The crash data is the main problem, because a normal diagnostic tool cannot clear it. The deletion takes place at Airbag24 as part of the repair.

The remaining causes can show up only after prolonged use: electronic components age, solder joints can go cold, and corrosion attacks the plug connections.

Voltage spikes arise, for example, from a weak battery or when a jump start is connected.

How can you tell that the 77960-TLA-R030-M4 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently. In addition an error message appears, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared.

The warning light is therefore the most important sign of a problem in the restraint system. It shows that the control unit has detected a fault.

In an emergency, airbags and seatbelt pretensioners may then fail to deploy. Therefore have the finding checked promptly.

Which vehicles is the 77960-TLA-R030-M4 fitted in?

The control unit 77960-TLA-R030-M4 is fitted in these vehicles: Honda CR-V 5 (2018-2023). Please check before removal whether your model is among them.

Here are the vehicles recorded for this part number:

• Honda CR-V 5 (2018-2023)

Two things will help you. Compare the part number on the label of the removed unit with this page, so that you can be sure you have the right unit. Also have the fault memory read out beforehand, because only that shows whether the control unit itself is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 5WK43782, 77960-SWA-G212-M4, 77960-SWA-G214-M4, 77960-SWAA-213-M1.

How does the repair of the 77960-TLA-R030-M4 work?

First have the fault memory read out, enclose the log and disconnect the battery; only then remove the control unit. Next, create a repair order online and send the unit in well packed. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench and repairs defective components. Stored crash data is then deleted, before a function test follows.

The unit then 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-TLA-R030-M4 get to Airbag24?

The unit goes to us as a parcel, or you book a UPS collection for an extra charge. After the repair it reaches you again by UPS.

Enclose the printed repair order in the parcel, and pack the unit shock-proof.