Airbag control unit with part number 65775B314A0

What does the airbag control unit 65775B314A0 do?

The 65775B314A0 is the airbag control unit of the restraint system (SRS) for BMW. It evaluates the signals from the crash sensors, decides in a crash within milliseconds on airbags and seatbelt pretensioners, and reports faults via the airbag warning light. After an accident it stores crash data and locks itself.

Outside an accident it monitors the system continuously and also checks the connections to the sensors.

Why does the control unit 65775B314A0 fail?

The most common cause on the 65775B314A0 is crash data that stays stored after an accident, even if no airbag has deployed. A normal diagnostic tool does not erase it. Added to this are ageing electronic components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes, for example from a weak battery or jump-starting.

Crash data is stored content and not a fault in the narrower sense. A unit with such entries can therefore appear outwardly unremarkable.

With the other causes, the electronics themselves wear over time. Solder joints and plug connections react to moisture and corrosion, and voltage spikes stress the components.

How can you tell that the 65775B314A0 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, and a fault message appears there. The diagnostic tool then finds no connection to the 65775B314A0, and the fault memory cannot be cleared.

In this state the airbags and seatbelt pretensioners may not be able to deploy in an emergency. The light shows the defect directly, so you do not have to search for it laboriously. Therefore have the vehicle checked promptly.

Which vehicles is the 65775B314A0 fitted in?

The control unit 65775B314A0 is fitted in these vehicles: BMW i5 G60 (from 2023).

The vehicles known to us for this part number are shown in this list:

• BMW i5 G60 (from 2023)

Comparing the part number on the unit's label with this page only confirms that it is the right unit. Whether the control unit itself is faulty is revealed only by the read-out fault memory. Have it read out beforehand, because a plug or cable can also be the cause.

How does the repair of the 65775B314A0 work?

For the repair of the 65775B314A0, first have the fault memory read out and enclose the log. Then disconnect the battery and only afterwards remove the control unit. Next create the repair order online and pack the unit well for dispatch. At Airbag24 itself, checking, repairing and testing usually take 3–4 working days.

Airbag24 checks the unit on the test bench, eliminates defects in individual components, deletes the stored crash data and carries out a function test. Afterwards your own unit goes back to you.

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 65775B314A0 get to Airbag24?

You send the control unit 65775B314A0 in as a parcel; alternatively, you book a UPS collection for an extra charge. After the repair the unit comes back by UPS. Put the printed repair order in the parcel and pack the control unit shock-proof.

A stable packaging protects the unit along the entire shipping route.