Airbag control unit with part number 77960-SEA-Q811-M1

What does the airbag control unit 77960-SEA-Q811-M1 do?

The airbag control unit 77960-SEA-Q811-M1 controls the restraint system (SRS) for Honda as its central unit. In an accident it evaluates the crash sensors and determines within milliseconds which airbags and seatbelt pretensioners trigger.

The sensors continuously send their measurements to the unit. The unit also monitors its own function and the wiring; if it finds a fault, the airbag warning light in the instrument cluster lights up.

After an accident the control unit records crash data and is then locked. Only a repair lifts this lock.

Why does the control unit 77960-SEA-Q811-M1 fail?

Stored crash data is the most common cause on the 77960-SEA-Q811-M1, even when no airbag has triggered. A normal read-out tool cannot reach it. Other causes are aged electronic components, cold solder joints, moisture and corrosion on connectors, and voltage spikes.

The crash data remains in the memory until it is erased during a repair. That no airbag has triggered changes nothing about this.

The other causes concern the electronics. Over time components lose performance, solder joints become brittle, and moisture with corrosion attacks the plug contacts. Voltage spikes, for example from a weak battery or when starting with external power, can add further stress.

How can you tell that the 77960-SEA-Q811-M1 is defective?

A fault on the 77960-SEA-Q811-M1 shows itself through the airbag warning light in the instrument cluster, which lights up permanently or intermittently, through a fault message in the instrument cluster, through a missing connection to the diagnostic tool, and through a fault memory that cannot be cleared. Airbags and seatbelt pretensioners may then possibly not trigger in an emergency.

Each of these signs is reason enough to have the condition checked. The warning light is the clearest signal: it shows that the restraint system has detected a fault.

A missing connection to the diagnostic tool can equally be due to lines or plugs. Only the fault memory shows which cause is actually present.

Which vehicles is the 77960-SEA-Q811-M1 fitted in?

The 77960-SEA-Q811-M1 is fitted in these vehicles: Honda Accord 7th generation (2002-2008).

Below you will find the list of vehicles recorded for this part number.

• Honda Accord 7th generation (2002-2008)

Compare the part number on the label of the removed unit with this page. This only shows whether it is the right unit, nothing more. Before you remove anything, have the fault memory read out; only this result shows whether the control unit is defective or whether a plug or cable is responsible for the fault.

For the same vehicles, we also repair control units with the part numbers 77960-SDA-306, 77960-SDN-C211-M1, 77960-SDR-A021-M4.

How does the repair of the 77960-SEA-Q811-M1 work?

First have the fault memory read out and enclose the log with the unit. Then disconnect the battery, remove the 77960-SEA-Q811-M1, create the repair order online and send it in well packed. At Airbag24 it is tested on the test bench, repaired or replaced where needed, freed of the crash data, and finally tested before your unit is returned.

The order of the first steps serves safety: the control unit is only removed once the battery has been disconnected.

At Airbag24 processing takes 3–4 working days as a rule, covering testing, repairing and checking.

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-SEA-Q811-M1 get to Airbag24?

You send the 77960-SEA-Q811-M1 as a parcel or book a UPS collection for an extra charge. Returns after the repair are made by UPS.

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