Airbag control unit with part number 65.77-6960383

What does the airbag control unit 65.77-6960383 do?

The 65.77-6960383 is an airbag control unit for BMW and forms the central control unit of the restraint system (SRS). In an accident it decides within milliseconds, based on the crash sensors, which airbags and seatbelt pretensioners are deployed; during normal operation it monitors the system constantly.

If the unit detects a fault, it indicates it via the airbag warning light. From the outside it is a flat, wide box. The label reads “SGM” and “LEAR”.

For this design we repair only fault 93F9 (voltage reserve or energy reserve); we cannot fix other faults on this unit.

Why does the control unit 65.77-6960383 fail?

On the control unit 65.77-6960383, fault 93F9 reports a problem with the voltage reserve or energy reserve. Aged electronic components, cold solder joints, moisture and corrosion, and voltage spikes are among the general causes of electronic defects.

What causes the problem on your unit can only be shown by the test.

Important if you would like to have crash data deleted: with this design, the crash data is not located in the control unit but in another module of the airbag system. In that case, please get in touch with us before sending the unit in, and we will clarify what is possible.

How can you tell that the 65.77-6960383 is defective?

A defect shows itself by the airbag warning light in the instrument cluster, which lights up permanently or intermittently, and by an entry in the fault memory. For the repair, this entry must be fault 93F9 (voltage reserve or energy reserve). In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

A message about the restraint system in the instrument cluster can also point to the defect. Have the fault memory read out with a diagnostic tool before you remove anything.

If the fault memory shows a fault other than 93F9, we cannot fix it on this design.

Which vehicles is the 65.77-6960383 fitted in?

The airbag control unit 65.77-6960383 is fitted in these vehicles: BMW 5 Series E60 Saloon and E61 Touring.

The vehicles are listed individually:

• BMW 5 Series E60 Saloon
• BMW 5 Series E61 Touring

Check two things before sending it in. First: does the part number on the label of the removed unit match this page? That only clarifies whether it is the right unit. Second: what does the fault memory say? Reading it out shows whether the control unit is defective or a plug or cable is the cause, and whether 93F9 is entered.

To tell them apart: the compact control unit with an “ACSM” label is a different design from the box that this page describes.

For the same vehicles, we also repair control units of this design with the part numbers 65.77-6960381, 65.77-6946384, 65776962703, 65776962886, 65776975684.

How does the repair of the 65.77-6960383 work?

The order matters: first the fault memory is read out, and the log showing fault 93F9 is enclosed with the order. Then you disconnect the battery, remove the control unit, create a repair order online and send in the well-packed unit.

Once it arrives, Airbag24 checks the unit on the test bench, replaces defective components and carries out a function test.

Airbag24 generally needs 3–4 working days for checking, repairing and testing. After that you receive your own unit back. 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.

With this design, we clarify personally what is possible if you would like to have crash data deleted. Please get in touch with us before you create the repair order.

How does the control unit 65.77-6960383 get to Airbag24?

You send the control unit in as a parcel or, for an extra charge, book a UPS collection. After the repair, Airbag24 sends it back to you by UPS.

Enclose the printed repair order in the parcel and pack the unit so that it is protected against impacts.