Airbag control unit with part number 6577-9348934-01

What does the airbag control unit 6577-9348934-01 do?

The airbag control unit 6577-9348934-01 coordinates the triggering of the airbags and seatbelt pretensioners in BMW. It evaluates the crash sensors, makes the triggering decision, and monitors the entire system. After an accident it stores crash data and locks itself.

If the unit detects a fault, it reports the fault condition to the airbag warning light in the instrument cluster.

Why does the control unit 6577-9348934-01 fail?

With the 6577-9348934-01, stored crash data is the most common cause, even if no airbag has deployed. A standard diagnostic tool cannot erase this data; Airbag24 erases it during the repair.

Other causes are:

• electronic components that age over time
• 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 6577-9348934-01 is defective?

The 6577-9348934-01 shows a defect when the airbag warning light stays on continuously or intermittently. In an emergency, the airbags and seatbelt pretensioners may then not deploy.

Typical signs are:

• An error message appears in the instrument cluster.
• The diagnostic tool receives no connection to the control unit.
• The fault memory cannot be cleared.

Which vehicles is the 6577-9348934-01 fitted in?

The control unit 6577-9348934-01 is fitted in these vehicles: BMW i8 I12 Coupé (2013-2018) and I12 LCI Coupé (2018-2020).

The list that follows shows the vehicles to which this part number belongs.

• BMW i8 I12 Coupé (2013-2018)
• BMW i8 I12 LCI Coupé (2018-2020)

First compare the number on the label of the removed unit with this page; this only confirms identity. Also have the fault memory read out beforehand, because only this shows whether the control unit itself is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 6818815, 9348934, 9381840, 9390579.

How does the repair of the 6577-9348934-01 work?

At Airbag24, processing of the 6577-9348934-01 usually takes 3–4 working days. The time covers exclusively checking, repairing and testing.

Beforehand, have the fault memory read out and attach the log. Disconnect the battery before removing the control unit, and then create the repair order online. Then send the well-packed unit in.

On the test bench, Airbag24 examines the unit, has defective components repaired, erases the crash data and runs a function test. 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 6577-9348934-01 get to Airbag24?

You send the 6577-9348934-01 as a parcel, or you book a UPS collection for an extra charge. The repaired unit is returned by UPS.

Enclose the printed repair order and pack the unit shock-proof.