Airbag control unit with part number 65.77-9296496-01

What does the airbag control unit 65.77-9296496-01 do?

The airbag control unit 65.77-9296496-01 controls the restraint system (SRS) for BMW. In an accident it evaluates the signals from the crash sensors and determines within milliseconds which airbags and seatbelt pretensioners are triggered. It continuously monitors the system and reports faults via the airbag warning light.

The manufacturer's number Bosch 0285011422 is also printed on the housing. After an accident, the unit stores crash data and locks itself.

While driving, the unit works continuously and checks the connected components.

Why does the control unit 65.77-9296496-01 fail?

Stored crash data is the most common cause of a failure of the 65.77-9296496-01, even if no airbag was triggered. Further causes are aged electronics, cold solder joints, moisture, corrosion and voltage spikes.

A normal diagnostic tool cannot delete the crash data.

The other causes at a glance:

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

How can you tell that the 65.77-9296496-01 is defective?

The airbag warning light in the instrument cluster indicates a defect in the 65.77-9296496-01 by lighting up permanently or intermittently. In addition there is an error message in the instrument cluster, no connection of the diagnostic tool to the control unit, and a fault memory that cannot be cleared. In that case, airbags and seatbelt pretensioners may not trigger in an emergency.

The warning light is the most obvious sign.

Only reading out the fault memory reveals which fault is present.

Which vehicles is the 65.77-9296496-01 fitted in?

This control unit is intended for BMW. The 65.77-9296496-01 is fitted in these vehicles: BMW 1 Series F21 3-door (2012-2019) and F20 5-door (2011-2019); BMW 2 Series F22 Coupé (2013-2021); BMW 3 Series F30 LCI Saloon (2015-2019) and F30 Saloon (2011-2015).

For this part number we have recorded the following vehicles:

• BMW 1 Series F21 3-door (2012-2019)
• BMW 2 Series F22 Coupé (2013-2021)
• BMW 3 Series F30 LCI Saloon (2015-2019)
• BMW 3 Series F30 Saloon (2011-2015)
• BMW 1 Series F20 5-door (2011-2019)

Compare the part number on the label of the removed unit with this page; this only confirms that it is the correct unit. The fault memory must be read out beforehand, because only this result shows whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 0 285 011 110, 0 285 011 137 Bosch, 0 285 011 730 Bosch, 285011421, 65 77 9 461 918, 65.77-9267214-02.

How does the repair of the 65.77-9296496-01 work?

You have the fault memory read out and attach the log before you disconnect the battery and remove the 65.77-9296496-01; only then do you create the repair order online and send in the well-packed unit. At Airbag24, defective components are repaired or replaced, stored crash data is deleted and a function test is carried out; afterwards your own unit is returned. Processing at Airbag24 usually takes 3–4 working days.

This sequence protects you during work on the airbag system.

The process begins with your cooperation; Airbag24 then takes over the inspection and the repair.

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 65.77-9296496-01 get to Airbag24?

You send a parcel to Airbag24, or book a UPS collection for the control unit 65.77-9296496-01 for an extra charge. After the repair, the unit goes back to you by UPS.

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