Airbag control unit with part number 25927274

What does the airbag control unit 25927274 do?

The airbag control unit 25927274 controls the restraint system (SRS) at Chevrolet. It evaluates the signals from the crash sensors, decides in an accident whether airbags and seatbelt pretensioners deploy, and monitors the system continuously. After an accident it stores crash data and locks itself.

The evaluation in a crash takes only milliseconds and takes place entirely within the unit.

It also detects faults outside an accident. They are displayed via the airbag warning light in the instrument cluster.

Why does the control unit 25927274 fail?

The most common cause is stored crash data after an accident, even without a deployed airbag. A normal diagnostic tool cannot erase it; Airbag24 erases it during the repair. Other possible causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

An earlier accident may not have been noticed, yet the data is in memory. That is a reason to think of it in the event of a failure.

The other causes concern the electronics and their environment. Moisture and corrosion attack the contacts, voltage spikes stress the components, and aged components lose function.

How can you tell that the 25927274 is defective?

The airbag warning light in the instrument cluster lights continuously or only intermittently, and an error message appears there. A diagnostic tool gets no connection to the control unit, and the fault memory cannot be cleared.

As long as the light is on, airbags and seatbelt pretensioners may not deploy in an emergency. The light therefore makes the defect visible.

Which point is affected only the inspection shows. Until then you should not regard the vehicle as safe.

Which vehicles is the 25927274 fitted in?

This part number is in use at Chevrolet. The control unit 25927274 was fitted in these vehicles: Chevrolet Impala 9th generation (2011-2016) and 9th generation (2005-2011).

The vehicles at a glance:

• Chevrolet Impala 9th generation (2011-2016)
• Chevrolet Impala 9th generation (2005-2011)

Compare the part number on the label of the removed unit with this page. This only ensures that it is the correct unit. Whether the control unit is defective or whether a plug or cable is the cause is shown only by the fault memory read out beforehand.

For the same vehicles, we also repair control units with the part numbers 15292056, 22816796, 84023178.

How does the repair of the 25927274 work?

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

Airbag24 checks the unit on the test bench, replaces defective components, erases stored crash data and carries out a function test. After that your own unit comes back to you.

Processing at Airbag24 usually takes 3–4 working days. It covers only checking, repairing and testing, not reading out, removal or shipping.

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 25927274 get to Airbag24?

You send the unit as a parcel or arrange a UPS collection for an extra charge. After the repair Airbag24 sends it back to you by UPS.

Put the printed repair order into the parcel and pack the unit shock-proof.