Airbag control unit with part number 77960-SNB-U415-M1

What does the airbag control unit 77960-SNB-U415-M1 do?

The control unit 77960-SNB-U415-M1 coordinates the restraint system (SRS) in Honda vehicles. It processes the measured values of the crash sensors and, in an accident, triggers the appropriate airbags and seatbelt pretensioners within milliseconds. If a component is faulty, it reports this via the airbag warning light.

The unit works in the background and checks the entire system continuously, not only at the moment of an impact. This ongoing monitoring ensures that faults are noticed early.

After an accident, the electronics store crash data and then lock themselves. Only a repair lifts this lock.

Why does the control unit 77960-SNB-U415-M1 fail?

Stored crash data is the most common cause of a failure for 77960-SNB-U415-M1, even if no airbag has deployed. A standard diagnostic tool cannot remove this data.

Other triggers are also possible: aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery or a jump start.

Only the test shows which cause actually applies. The fault memory helps, but it remains only an indication.

How can you tell that the 77960-SNB-U415-M1 is defective?

A defect can show itself through the airbag warning light in the instrument cluster, which stays on permanently or intermittently, possibly accompanied by an error message on the display. For the 77960-SNB-U415-M1 this can mean that airbags and seatbelt pretensioners may not deploy in an emergency.

Another sign is when the diagnostic tool cannot establish a connection with the control unit. A fault memory that cannot be emptied also indicates that something is wrong in the control unit itself.

In this case, do not wait for the light to go out by itself. A test provides clarity faster than any assumption.

Which vehicles is the 77960-SNB-U415-M1 fitted in?

The control unit with part number 77960-SNB-U415-M1 comes from Honda. It is fitted in these vehicles: Honda Civic 8th generation (2005-2011).

The following information comes from our data on this part number and can be checked against your vehicle:

• Honda Civic 8th generation (2005-2011)

Have the fault memory read out before removal. Then compare the part number on the label of the removed unit with 77960-SNB-U415-M1, which confirms that the control unit really is defective and not a plug or a cable.

For the same vehicles, we also repair control units with the part numbers 77960-S02-A840-M3, 77960-SMG-G014-M1.

How does the repair of the 77960-SNB-U415-M1 work?

First you read out the fault memory and attach the log. Then you disconnect the battery, remove the control unit 77960-SNB-U415-M1 and create a repair order online. Finally you pack the unit well and send it in.

At our site the unit goes to the test bench. There, defective components are repaired, stored crash data is deleted and a function test is carried out before the unit is returned to you.

Processing at Airbag24 generally takes 3–4 working days, and this time covers only checking, repairing and testing.

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-SNB-U415-M1 get to Airbag24?

You send the control unit 77960-SNB-U415-M1 to Airbag24 as a parcel or have it collected by UPS for an extra charge. After the repair you receive it back from Airbag24 by UPS.

Place the printed repair order in the parcel, and pack the unit shockproof.