Airbag control unit with part number 20995843

What does the airbag control unit 20995843 do?

The airbag control unit 20995843 controls the restraint system in Chevrolet vehicles. It evaluates the crash sensors, determines in an accident which airbags and seatbelt pretensioners are triggered, and monitors the entire system continuously. It indicates detected faults via the airbag warning light.

The decision on triggering is made within milliseconds, and the unit needs reliable measured values for that. An accident causes it to store crash data and lock itself.

Why does the control unit 20995843 fail?

The most common cause is crash data stored after an accident, even if no airbag was triggered. An ordinary diagnostic tool does not erase it; Airbag24 erases it during the repair. Other causes are aged electronics, cold solder joints, moisture at plug connections and voltage spikes.

The further causes at a glance:

• aged electronic components
• cold solder joints
• moisture and corrosion at plug connections
• voltage spikes, for example with a weak battery or jump-starting

Only an inspection of the unit can establish which of these causes applies.

How can you tell that the 20995843 is defective?

A defect shows itself through an airbag warning light in the instrument cluster that lights up permanently or intermittently, through a fault message in the instrument cluster, through a missing connection to the diagnostic tool, or through a fault memory that cannot be cleared. In that case, airbags and seatbelt pretensioners may not deploy in an emergency.

The warning light indicates a fault within the system itself, which is why it is one of the most important signs. If the diagnostic tool does not reach the control unit, a cable, the power supply or the control unit itself may be the cause. Have a fault checked promptly.

Which vehicles is the 20995843 fitted in?

The control unit 20995843 is fitted in these vehicles: Chevrolet Cobalt 1st generation (2004-2010).

The list of vehicles follows here.

• Chevrolet Cobalt 1st generation (2004-2010)

Compare the part number on the label of the removed unit with this page. This tells you whether you have the correct unit. Also have the fault memory read out beforehand, because only this result shows whether the control unit is defective or a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 15249432, 22729009, 22729011.

How does the repair of the 20995843 work?

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

Airbag24 checks the control unit on the test bench, replaces defective components, erases stored crash data and carries out a function test. Processing usually takes 3–4 working days, after which your own unit is returned 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 20995843 get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge, and Airbag24 returns it by UPS after the repair.

Enclose the printed repair order in the parcel and pack the control unit shockproof.