Airbag control unit with part number 13595566

What is the function of Airbag Control Unit 13595566?

The airbag control unit with part number 13595566 is the central control module of the Supplemental Restraint System (SRS) in the Chevrolet Volt. It continuously monitors all relevant sensors and components to precisely and rapidly deploy the airbags and seatbelt pretensioners in the event of a collision.

As the brain of the passive safety system, the control unit processes data from acceleration and pressure sensors. It analyzes the severity and type of impact to determine which restraint systems need to be activated, ensuring optimal protection for vehicle occupants.

A key feature of this control unit is its safety function: after deployment, it stores so‑called crash data and locks itself. The unit is then considered “used up” and must either be replaced or professionally reset to restore full functionality of the airbag system.

Why does Airbag Control Unit 13595566 fail?

The most common cause of failure is the storage of crash data following an accident. The control unit then permanently locks itself to prevent erroneous re‑deployment. Additionally, internal electronic faults may occur, indicated by error code B1111 (“control unit defective”) in the fault memory.

After a collision, the lockout due to stored crash data is the normal, safety‑critical state. Without professional data erasure and reset, the airbags remain inactive, potentially leading to severe injuries in a subsequent accident. Simply clearing the fault memory with a standard diagnostic tool is insufficient in such cases.

Besides crash‑data lockout, internal components of the control unit can also fail, resulting in malfunctions detected by the system itself and signaled by the airbag warning light. Specific error B1111 directly points to such an internal defect.

However, before removing the control unit, it’s important to rule out other potential causes of the issue. Faulty cables, corroded connectors—especially under the seats—defective seat occupancy mats, or a damaged coil spring on the steering wheel can all produce similar symptoms.

How do you recognize a defect in Control Unit 13595566?

The clearest sign of a problem in the airbag system is a red airbag warning light (SRS lamp) that remains steadily illuminated or flashes in the instrument cluster. This indicates that the system has detected a fault and may not function correctly in the event of an accident.

The SRS warning light fails to extinguish after starting the vehicle or begins flashing during driving. This is a direct indication that the fault memory needs to be read to diagnose the exact cause.

Following an accident, the warning light remaining on is normal and signals that the control unit has been locked. In this state, the system is deactivated. A diagnosis in such cases will reveal error codes related to stored crash data.

In some instances, communication issues may arise, preventing a diagnostic tool from establishing connection with the airbag control unit. A specialized workshop can use targeted diagnostics to determine whether the fault lies directly within the control unit or involves a peripheral component.

In which vehicles is Control Unit 13595566 installed?

Part number 13595566 is specifically used in two generations of the Chevrolet Volt. It is designed to ensure proper operation of the restraint system in these models and cannot be replaced by universal control units.

At Airbag24, we repair Airbag Control Unit 13595566 for the following models:

Chevrolet Volt 1st Generation (model years 2010–2015)

Chevrolet Volt 2nd Generation (model years 2015–2019)

Is repairing Control Unit 13595566 worthwhile?

Yes, repair is the most economical and technically sensible solution. Compared to a costly new unit, often priced between €400 and €750, repair offers significant savings while restoring the original part’s full functionality.

The biggest advantage is the substantial cost reduction—up to 70% compared to purchasing a new unit. You receive a fully reset and tested control unit that meets factory specifications.

Since the original, vehicle‑specific control unit is retained, there’s no need for time‑consuming and expensive programming or coding procedures typically required when replacing with a new part. Repair provides a plug‑and‑play solution.

We offer 2 years’ statutory liability for defects on every repair performed, giving you confidence in receiving a reliable, long‑lasting solution for your vehicle.

How does the repair process work at Airbag24?

The repair process is designed for speed and simplicity. It begins with the professional removal of the control unit, followed by shipment to Airbag24, where it undergoes expert refurbishment, and finally returns to you fully tested.

First, the control unit must be removed from the vehicle. In the Chevrolet Volt, it is often located in the center console, for example beneath the handbrake lever. Removal should be carried out carefully to avoid damaging the delicate connectors and pins.

Upon receipt at Airbag24, our technicians perform a comprehensive electronic analysis. Using specialized software, all stored crash data is completely erased, and internal fault codes are reset, restoring the unit to its original factory condition.

After successful repair and final testing, the control unit is shipped back to you. Once reinstalled, it is crucial to clear the vehicle’s fault memory using an appropriate diagnostic tool. Following this, the SRS warning light should go out, and the system should be fully functional again.