Airbag control unit with part number 77960-3A0-Q720-M2

What does the airbag control unit 77960-3A0-Q720-M2 do?

The unit 77960-3A0-Q720-M2 is the airbag control unit of the restraint system (SRS) for Honda. It continuously checks the messages from the crash sensors and, in a collision, decides which airbags and seatbelt pretensioners are triggered. After an accident it stores crash data and then locks itself.

The evaluation takes place in fractions of a second, so that the restraint devices respond in time. The control unit reports faults via the airbag warning light in the instrument cluster, and this indicator is for you the first sign of a problem.

Why does the control unit 77960-3A0-Q720-M2 fail?

With 77960-3A0-Q720-M2 the most common cause is stored crash data from an accident, even when no airbag has triggered. Aged components, cold solder joints, moisture and voltage spikes are also possible.

A normal diagnostic tool cannot erase this crash data. Airbag24 erases it during the repair.

Typical further causes are:

• aged 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 77960-3A0-Q720-M2 is defective?

A defect in the 77960-3A0-Q720-M2 shows first at the airbag warning light, which lights up permanently or intermittently. In addition a fault message appears in the instrument cluster, and the diagnostic tool gets no connection to the control unit.

A fault memory that cannot be cleared is a further sign. In this state airbags and seatbelt pretensioners may not trigger in an emergency, so a prompt check is worthwhile.

Which vehicles is the 77960-3A0-Q720-M2 fitted in?

The control unit 77960-3A0-Q720-M2 was fitted in these vehicles: Honda CR-V 6 (from 2022).

The models in detail can be found in this overview:

• Honda CR-V 6 (from 2022)

Check the part number on the label of your removed unit against this page, so that you know you have the right unit in front of you. Also have the fault memory read out beforehand, because only this result shows whether the control unit is actually defective or whether a plug or cable is the cause.

How does the repair of the 77960-3A0-Q720-M2 work?

First have the fault memory read out and attach the log to the parcel. Only then disconnect the battery and remove the control unit 77960-3A0-Q720-M2. Next create a repair order online and send in the well-packed unit.

Airbag24 checks the unit on the test bench, replaces defective components, erases the stored crash data and carries out a function test. Afterwards your own unit is returned to you.

Processing at Airbag24 usually takes 3–4 working days. This time covers only checking, repairing and testing with us, not your steps before shipping.

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 77960-3A0-Q720-M2 get to Airbag24?

Either you send the unit in as a parcel, or you book a UPS collection for an extra charge. After the repair Airbag24 returns the unit by UPS.

Pack the control unit shockproof so that nothing is damaged in transit, and put the printed repair order into the parcel.