Airbag control unit with part number 77960-SNA-H020-M1

What does the airbag control unit 77960-SNA-H020-M1 do?

The central control unit of the restraint system for Honda is the airbag control unit 77960-SNA-H020-M1. It evaluates crash sensors, decides within milliseconds in a crash which airbags and seatbelt pretensioners fire, and checks the system constantly. It shows faults via the airbag warning light.

The check runs in the background, and every deviation is registered.

After a crash, the unit stores crash data and locks itself.

Why does the control unit 77960-SNA-H020-M1 fail?

Crash data from an accident is primarily behind it, even if no airbag has deployed; a standard diagnostic tool cannot erase it. In addition come aging of the electronics, cold solder joints, moisture, corrosion and voltage spikes.

Airbag24 erases crash data during the repair, so you do not need to do any preparatory work.

• aged electronic components
• cold solder joints
• moisture and corrosion at plug connections
• voltage spikes, for example from a weak battery or a jump start

How can you tell that the 77960-SNA-H020-M1 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently as soon as the system detects a fault. Fault messages in the instrument cluster, a missing connection to the diagnostic tool and a fault memory that cannot be cleared also occur. In an emergency, airbags and seatbelt pretensioners may then not deploy.

The warning light is the most unambiguous display in the vehicle, because it stays visible as long as the fault is present.

If this indication appears, do not wait; have the system checked promptly.

Which vehicles is the 77960-SNA-H020-M1 fitted in?

The 77960-SNA-H020-M1 is fitted in these vehicles: Honda Civic 8th generation (2005-2011). The part number is the decisive feature.

The overview reads:

• Honda Civic 8th generation (2005-2011)

Compare the part number on the label of the removed unit with this page; this only confirms the right unit. Have the fault memory read out beforehand, because only then does it become clear whether the control unit is defective or whether a connector or cable is affected.

For the same vehicles, we also repair control units with the part numbers 77960-SMG-G014-M1, 77960-SMG-G021-M1, 77960-SMG-G120-M1, 77960-SNA-L220-M1, 77960-SNA-L230-M1, 77960-SNA-M410-M1.

How does the repair of the 77960-SNA-H020-M1 work?

First have the fault memory read out, enclose the log and then disconnect the battery; only then remove the control unit. Next create the repair order online and pack the unit well before sending it. Airbag24 inspects the unit, replaces defective components, erases the crash data and runs a function test, for which 3–4 working days are usually scheduled.

The sequence is binding for safety reasons.

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-SNA-H020-M1 get to Airbag24?

You send the unit as a parcel, or UPS collects it from you for an extra charge. After the repair, UPS brings the control unit 77960-SNA-H020-M1 back to you.

Enclose the printed repair order with the parcel, and pack the unit shockproof.