Airbag control unit with part number 9494738

What is the function of Airbag Control Unit 9494738?

The original OEM Airbag Control Unit 9494738 is the central control module for the occupant protection system in the Peugeot 108 I (2014–2022). It processes data from crash sensors and is responsible for precisely deploying airbags and seatbelt pretensioners in the event of a collision. This component is technically interchangeable with part number 892450-D020.

As the heart of the passive safety system, this unit continuously monitors all relevant components—from impact sensors at the front and sides of the vehicle to seatbelt pretensioners and individual airbag modules. Within milliseconds, its electronics determine whether and which restraint systems need to be activated to provide optimal occupant protection.

Specially designed for the Peugeot 108 I, particularly the 1.0 VTi version, this control unit ensures the proper functioning of the entire SRS (Supplemental Restraint System). Its compatibility with the alternative part number 892450-D020 underscores its specific application within this vehicle platform.

Why does Control Unit 9494738 fail?

The most common cause of failure for Control Unit 9494738 is the storage of crash data after an accident, which results in the system being locked. Other causes include electronic malfunctions, internal component defects, short circuits, or water damage that impair the unit’s internal communication and functionality.

After airbags or seatbelt pretensioners are deployed, the control unit irrevocably writes so‑called crash data into its internal memory. This is a manufacturer‑specified safety measure intended to prevent further use of a potentially damaged system, thereby locking the device. A purely diagnostic clearing of fault codes is then no longer possible.

In addition, hardware defects can occur even without an accident. These include electronic malfunctions on the circuit board, sensor or other component failures, as well as communication errors caused by short circuits or moisture ingress (water damage). Such issues also lead to deactivation of the airbag system.

Symptoms of a Defect in Control Unit 9494738

A defect in Airbag Control Unit 9494738 primarily manifests as a permanently illuminated or flashing airbag warning light (SRS). Additionally, stored fault codes—such as internal control unit errors (e.g., U1XXX, B1XXX)—often cannot be cleared, and communication with a diagnostic tool is frequently impossible.

The most obvious sign is the airbag indicator light in the instrument cluster, which fails to turn off after the engine starts. This unmistakably alerts the driver that the safety system is not operational and that airbags would not deploy in the event of a crash.

During workshop diagnostics, the problem often appears as fault codes indicating an internal defect in the control unit that cannot be reset. Typical entries include “control unit defective” or references to communication issues within the system.

In severe cases, the control unit becomes completely unreachable by diagnostic equipment. It does not respond to queries, complicating troubleshooting and clearly signaling total failure of the unit. Continuing to operate the vehicle under these conditions poses a significant safety risk.

In Which Vehicles Is Control Unit 9494738 Installed?

The Airbag Control Unit with part number 9494738 is specifically used in the first-generation Peugeot 108 (model years 2014–2022). At Airbag24, we specialize in repairing this component, particularly for variants such as the 1.0 VTi, restoring full functionality to the safety system.

Specifically, this component is found in the following models:

Peugeot 108 I (2014–2022)

Our technical expertise ensures that repairs are carried out professionally across all engine types and trim levels of this model, restoring original safety and functionality according to manufacturer specifications.

How Is Control Unit 9494738 Professionally Repaired?

At Airbag24, the repair process for Control Unit 9494738 follows a systematic approach. Upon receipt, the unit is analyzed, crash data is erased, and defective electronic components are replaced or reprogrammed. Final tests confirm restoration to factory condition, backed by 2 years' statutory liability for defects.

First, it is recommended to read the fault memory before removing the control unit to narrow down the root cause of the issue. After removal, the unit is securely packaged and shipped to Airbag24.

Upon receipt, our technicians perform a comprehensive analysis. Using specialized testing equipment and software, we identify stored crash data and inspect the hardware for electronic defects. The core of the repair process involves restoring the unit to its original factory condition by erasing the crash data and, if necessary, replacing defective components.

Subsequently, the repaired control unit undergoes a final inspection to ensure full functionality. After return shipping and reinstallation in the vehicle, only the vehicle’s fault memory needs to be cleared. We provide 2 years' statutory liability for defects on every repair.

What are the benefits of repair?

Repairing the airbag control unit 9494738 offers significant advantages. Cost savings can reach up to 90% compared to a new part, which may cost as much as €750. Additionally, the unit is restored to factory settings, eliminating the need for time-consuming reprogramming at a dealership and backed by 2 years' statutory liability for defects.

The financial benefit is substantial. While a new manufacturer‑supplied control unit represents a significant investment, repair provides an economically sensible alternative without compromising safety.

An additional key advantage is that the repaired original control unit remains “plug-and-play.” Since the vehicle‑specific configuration is preserved, no costly and time‑intensive reprogramming at an authorized workshop is required after installation. Moreover, repair is a sustainable solution that conserves valuable resources and helps reduce electronic waste.