Airbag control unit with part number 13518546

What does the airbag control unit 13518546 do?

The airbag control unit 13518546 is the control centre of the restraint system (SRS) in Chevrolet. It processes sensor data, determines in a crash which airbags and seatbelt pretensioners are triggered, and monitors the state of the system continuously. It reports faults via the airbag warning light.

The decision is made within milliseconds, and the sensors continuously supply the unit with measured values for this.

The control unit stores crash data after an accident, and it then locks itself.

Why does the control unit 13518546 fail?

Crash data stored after an accident is the most common cause for the 13518546, even if no airbag was triggered. Other possible causes are aged components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes.

A normal diagnostic tool cannot erase crash data. Airbag24 erases it during the repair.

The other causes lie in the electronics and their surroundings. Components age, solder joints can turn cold, and moisture and corrosion attack plug connectors.

How can you tell that the 13518546 is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently if there is a fault on the 13518546. A fault message in the instrument cluster or a fault memory that cannot be cleared also point to it. In this state, airbags and seatbelt pretensioners may possibly fail to trigger in an emergency.

The warning light is a direct signal that you notice without a diagnostic tool. If it stays on, have the system checked.

Even a fault that occurs only intermittently remains in the fault memory and deserves attention.

Which vehicles is the 13518546 fitted in?

The airbag control unit 13518546 is fitted in these vehicles: Chevrolet Bolt EV 1st generation (2016-2021) and 1st generation Facelift (2021-2023). The details refer to the make Chevrolet.

The vehicles are listed individually here:

• Chevrolet Bolt EV 1st generation (2016-2021)
• Chevrolet Bolt EV 1st generation Facelift (2021-2023)

Comparing the part number on the label of the removed unit with this page ensures that you have removed the right unit. Whether the control unit is defective or only a plug or cable is the cause, however, is shown only by the fault memory, which you have read out beforehand.

How does the repair of the 13518546 work?

For the 13518546, first have the fault memory read out and attach the log, then disconnect the battery and remove the control unit. Afterwards fill in the repair order online and send the unit in well packed. The processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench and replaces defective components. It also erases stored crash data before a function test follows. Afterwards, 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 13518546 get to Airbag24?

You send the control unit 13518546 by parcel, or you book a UPS collection for an extra charge. The return after the repair is made by UPS.

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