Airbag control unit with part number 9145400-01

What does the airbag control unit 9145400-01 do?

As the SRS control unit, the airbag control unit 9145400-01 controls the restraint system for BMW. In an accident, it checks the signals from the crash sensors and decides within milliseconds whether to trigger airbags and seatbelt pretensioners.

The unit monitors the system continuously and reports faults via the airbag warning light.

After an accident, it stores crash data and locks itself.

Why does the control unit 9145400-01 fail?

The most common cause of the 9145400-01 failing is crash data stored after an accident, even if no airbag has triggered. A normal diagnostic tool cannot delete this data. Other causes may come into consideration, in brief:

• ageing electronic components
• cold solder joints
• moisture and corrosion at plug connections
• voltage spikes, for example from a weak battery or a jump start

Which of these applies only becomes clear after the test.

How can you tell that the 9145400-01 is defective?

The airbag warning light in the instrument cluster lights up on the 9145400-01 permanently or intermittently as soon as a fault is present. Fault messages in the instrument cluster, a fault memory that cannot be cleared, and a missing connection between the diagnostic tool and the control unit also point to one.

In an emergency, airbags and seatbelt pretensioners may then fail to trigger. A prompt check is therefore advisable.

Which vehicles is the 9145400-01 fitted in?

The model list shows whether your vehicle is included. The control unit 9145400-01 is fitted in these vehicles: BMW 6 Series E63 Coupé (2003-2010); BMW 5 Series E61 LCI Touring (2007-2010), E61 Touring (2004-2007), E60 LCI Saloon (2007-2010) and E60 Saloon (2003-2007); BMW M5 E61 Touring (2007-2010).

In detail, these include:

• BMW 6 Series E63 Coupé (2003-2010)
• BMW 5 Series E61 LCI Touring (2007-2010)
• BMW M5 E61 Touring (2007-2010)
• BMW 5 Series E61 Touring (2004-2007)
• BMW 5 Series E60 LCI Saloon (2007-2010)
• BMW 5 Series E60 Saloon (2003-2007)

Comparing the part number on the label with this page ensures that it is the right unit. Whether the control unit itself is defective, or a plug or cable is the cause, is only clarified by reading out the fault memory, which you should have done beforehand.

For the same vehicles, we also repair control units with the part numbers 31911421401V, 319145401011, 65 77 9 118 749 01, 65 77 911 4214-01, 65.77 9172018-01, 65.77-6941018.

How does the repair of the 9145400-01 work?

First have the fault memory of the 9145400-01 read out and attach the log, then disconnect the battery. Then remove the control unit, create a repair order online and send in the unit.

Airbag24 checks the unit on the test bench, repairs defective components, deletes stored crash data and carries out a function test. After that, your own unit is returned.

Processing at Airbag24 usually takes 3–4 working days. 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 9145400-01 get to Airbag24?

Send in the control unit 9145400-01 as a package, or book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

You put the printed repair order into the package and pack the unit securely.