Airbag control unit with part number 1608428080

What is the function of the airbag control unit 1608428080?

The airbag control unit with part number 1608428080 is the central control module for the occupant protection system in various commercial vehicles from the PSA Group. It processes data from crash and acceleration sensors and, within milliseconds, decides whether to activate airbags and seatbelt pretensioners to protect vehicle occupants in the event of a collision.

This ECU (Electronic Control Unit) is specifically designed for the architecture of models such as the Peugeot Boxer and Citroën Jumper. It remains continuously connected to all relevant components of the SRS (Supplemental Restraint System), including front, side, and head airbags, seat occupancy detection, and pyrotechnic seatbelt pretensioners. Proper functionality is essential for the vehicle’s type approval.

Why does the control unit 1608428080 fail?

The most common causes of failure for the control unit 1608428080 are internal electronic defects on the circuit board. These include memory errors (EEPROM/Flash) used to store crash data, as well as faulty SMD components. Communication issues or specific error codes such as B0100-49 are also typical and indicate a hardware fault.

A primary cause is the storage of so‑called “crash data” after an accident. This data permanently disables the control unit and must be professionally reset. This is not a software issue but rather a safety‑related lock at the hardware level.

Age‑related failures of electronic components—such as resistors, capacitors, or integrated circuits (ICs)—are also frequently observed. Microcracks in solder joints (cold solder joints) or defects in the module’s power supply can likewise lead to sporadic or permanent malfunctions, often signaled by specific error codes.

Error messages related to side airbags or seatbelt locks (e.g., B101C) often do not point to peripheral faults but rather to processing problems within the control unit itself. A professional diagnosis is essential here to clearly identify the root cause.

How can you recognize a defect in the airbag control unit?

A defect in the control unit 1608428080 typically manifests as a permanently or intermittently illuminated airbag or SRS warning light on the instrument cluster. Often, the control unit cannot be read by a diagnostic tool, or it displays internal, non‑erasable error codes such as B0100 (internal electronic fault).

The most obvious sign is the active airbag warning light. This indicates a malfunction in the restraint system that requires immediate inspection. In case of a fault, the system is usually deactivated, posing a significant safety risk in the event of a crash.

Another clear symptom is the lack of communication. If a workshop attempts to read the fault memory, the diagnostic tool receives no response from the airbag control unit, pointing to a severe internal defect.

Codes stored in the fault memory, such as B0100, B0100-49, or B101C, are also specific indicators. They directly signal a defect within the control electronics and cannot be resolved simply by clearing the fault memory as long as the underlying hardware issue persists.

In which vehicles is 1608428080 installed?

At Airbag24, we repair the control unit with part number 1608428080 for a range of PSA commercial vehicles. It is primarily used across various generations and facelifts of the Peugeot Boxer, Citroën Jumper, and the identical Citroën Relay. Repair is the most cost‑effective solution in these cases.

Peugeot: Boxer I (1994–2002), Boxer III (2006–2011), Boxer III 1st Facelift (2011–2014), Boxer III 2nd Facelift (2014–2024), Boxer III 3rd Facelift (2023–present)

Citroën: Jumper I (1994–2002), Jumper II (2001–2006), Jumper III (2006–2011), Jumper III 1st Facelift (2011–2014), Jumper III 2nd Facelift (2014–2024), Jumper III 3rd Facelift (2023–present)

Citroën: Relay I (1994–2002), Relay II (2001–2006), Relay III (2006–2011), Relay III 1st Facelift (2011–2014), Relay III 2nd Facelift (2014–2024), Relay III 3rd Facelift (2023–present)

How is the control unit 1608428080 professionally repaired?

Repair at Airbag24 follows a standardized, safe process. After receiving your removed control unit, our technicians analyze the circuit board at the component level. Defective SMD components are replaced, solder joints are reworked, and stored crash data is erased upon authorization. You receive 2 years' statutory liability for defects on the completed repair.

An accurate diagnosis performed on the vehicle prior to removal is crucial. A complete diagnostic report attached to the control unit confirms that the fault lies within the control unit itself, not in the peripherals (e.g., wiring harness, sensors).

Upon receipt at Airbag24, the housing is carefully opened. A detailed inspection of the circuit board is performed under a microscope. Our technicians identify and replace defective components such as voltage regulators, EEPROM/Flash memory, or other SMD parts. If necessary and permitted, crash data is reset and the VIN is reprogrammed.

Finally, the repaired control unit undergoes a comprehensive test. After reinstalling it in the vehicle, the fault memory typically needs to be cleared using an appropriate diagnostic tool. The repair restores full functionality of the airbag system and offers a cost-effective alternative to an expensive new part.