B10364A airbag control unit fault

What does error code B10364A mean?

Error code B10364A indicates a problem with the passenger-side side airbag system. Specifically, the airbag control unit has detected an incorrect component—typically an incompatible or defective crash sensor. This results in an error message and deactivation of the affected safety circuit until the underlying issue is resolved.

Technically speaking, this error code means that the control unit has identified a discrepancy between the expected and the actually detected component. Each component in the airbag system, such as the crash sensor for the passenger-side side airbag, carries a specific electronic signature.

If this signature differs—whether due to a sensor defect, wiring issues, or an internal signal-processing fault within the control unit—the DTC B10364A is stored in the fault memory. For safety reasons, the system switches to a fault mode.

How can you recognize error B10364A?

The primary symptom of error B10364A is a permanently illuminated airbag warning light on the instrument panel. Additionally, a corresponding error message may appear on the vehicle’s display. In workshop diagnostics, error code B10364A can be clearly retrieved from the airbag control unit’s fault memory.

The airbag warning light remains lit after starting the vehicle and does not extinguish as it normally would. This is a clear indication that the restraint system is not fully operational.

In the event of a collision, deployment of the passenger-side side airbag may be impaired or completely prevented. Therefore, prompt diagnosis and repair are critical for safety when this fault occurs.

What causes B10364A?

The most common cause of B10364A is a faulty or simply mismatched crash sensor on the passenger-side side airbag. Other reasons include defective wiring, corroded connectors, or an internal hardware failure within the airbag control unit itself—such as aging electronic components or water damage.

A defective sensor or one unsuitable for the vehicle model is the primary source of the error. The control unit detects an incorrect identification or a faulty signal and triggers the error code.

Damage to wiring, connectors, or sensor connections can also lead to this fault. Cable breaks, short circuits, or corrosion disrupt communication between the sensor and the control unit.

An internal malfunction within the airbag control unit may also be responsible. Board defects—caused by aging electronic components or moisture ingress—can prevent proper processing of sensor signals.

In some cases, crash data stored after an accident can block normal operation of the control unit and trigger secondary error messages.

On which vehicles does B10364A occur?

Error code B10364A specifically affects models from the Volkswagen Group. It is particularly well-known in the Volkswagen e-up! series. Airbag24 offers professional repair services for affected control units to restore full functionality of the airbag system.

At Airbag24, error code B10364A is expertly repaired for the following models and series:

Volkswagen: e-up! (AA series, model years 2013–2019)

Volkswagen: e-up! (AA series facelift, model years 2019–2023)

How is B10364A professionally repaired?

Repair begins with a diagnostic procedure to confirm error B10364A. After sending the removed control unit to Airbag24, an electronic analysis is performed. Defective components on the circuit board are replaced, stored crash data is erased, and the device is reset to factory settings, followed by a functional test.

As this is a safety-critical component, repairs should only be carried out by specialists with appropriate experience and diagnostic expertise. The process at Airbag24 restores full functionality.

Upon receipt, the control unit is scanned to verify the error. An important step involves erasing any stored crash data that could interfere with proper operation. The device is then restored to its factory settings.

During electronic refurbishment, the circuit board is inspected at the hardware level. Defective components responsible for processing sensor signals are identified and replaced with new, high-quality parts. This often provides a long-lasting solution when the fault lies within the control unit itself.

After repair, a thorough inspection of vehicle-side components such as wiring and sensors is essential to rule out external sources of failure. The refurbished control unit undergoes a functional test upon completion. Two years' statutory liability for defects is provided on the repair.