Airbag control unit with part number 24423840

What does the airbag control unit 24423840 do?

The airbag control unit 24423840 is the central control unit of the SRS for vehicles from Opel. It evaluates the signals from the crash sensors and decides in an accident within milliseconds whether airbags and seatbelt pretensioners are triggered. It monitors the restraint system continuously and reports faults via the airbag warning light.

As long as the system is working correctly, the unit does not stand out while driving.

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

Why does the control unit 24423840 fail?

For the 24423840, the most common cause is crash data stored after an accident, even if no airbag was triggered. A standard diagnostic tool cannot erase this data. Other possible causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Airbag24 removes the crash data as part of the repair. An attempt to erase it with the usual diagnostic tool does not succeed.

The other causes affect the unit itself or its contacts. Aged components and cold solder joints can cause faults, moisture and corrosion disturb the connections, and voltage spikes, for example from a weak battery or a jump start, stress the electronics.

How can you tell that the 24423840 is defective?

A defect in the 24423840 shows itself mainly through the airbag warning light in the instrument cluster, which lights up permanently or intermittently. Added to this are an error message, a missing connection to the diagnostic tool, or a fault memory that cannot be cleared.

These signs in detail:

• airbag warning light lights up permanently or intermittently
• error message in the instrument cluster
• diagnostic tool finds no connection to the control unit
• fault memory cannot be cleared

In an emergency, airbags and seatbelt pretensioners may not trigger. Take this warning seriously and have it checked.

Which vehicles is the 24423840 fitted in?

The assignment depends on the part number 24423840, not only on the model name. The control unit 24423840 is fitted in these vehicles: Opel Corsa C (2000-2006).

The assignment is listed here:

• Opel Corsa C (2000-2006)

Compare the part number on the label of the removed unit with this page, and you will know that it is the right unit. Have the fault memory read out beforehand, because only that shows whether the control unit is defective or a connector or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 13212353CA, 24 439 952 LA, 24 439 953 LB, 24439954, 9115117.

How does the repair of the 24423840 work?

First have the fault memory read out and enclose the log. Then disconnect the battery and only then remove the control unit 24423840. Next, create a repair order online and send the well-packed unit in.

Airbag24 then checks the unit on the test bench, repairs defective components, erases the crash data and carries out a function test. Processing at Airbag24 takes 3–4 working days as a rule.

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 24423840 get to Airbag24?

You send the control unit 24423840 to Airbag24 as a parcel or book a UPS collection for an extra charge. After the repair, your own unit reaches you again by UPS.

The printed repair order belongs in the parcel, and the unit is to be packed shockproof.