Airbag control unit with part number 1375110080

What is the function of Airbag Control Unit 1375110080?

The airbag control unit with part number 1375110080 is the central electronic control unit (ECU) of the occupant restraint system (SRS) in van models from Citroën, Peugeot, and Fiat. Its primary task is to process sensor data to ensure precise and reliable deployment of airbags and seatbelt pretensioners in the event of a crash.

As the brain of the passive safety system, it continuously monitors the crash sensors distributed throughout the vehicle. If the control unit detects a collision severe enough to endanger occupants, it sends ignition signals to the relevant airbag modules and pyrotechnic seatbelt pretensioners within milliseconds.

In addition, the control unit is responsible for system diagnostics. It constantly checks the functionality of all connected components and indicates malfunctions by illuminating the airbag warning light on the dashboard. This functionality is crucial for maintaining safety throughout the vehicle’s entire service life.

Why does Airbag Control Unit 1375110080 fail?

The most common causes of failure for control unit 1375110080 are stored crash data following an accident that blocks further operation, as well as internal electronic defects on the circuit board. These hardware faults often result in complete communication failure and are signaled by error codes such as B0100.

After a collision, the control unit stores so‑called “impact/crash data.” This is a safety measure that locks the module, preventing reuse without inspection and repair. A professional repair involves legally compliant deletion of this data to restore full functionality.

Another typical defect is an internal hardware failure, often indicated by error codes B0100 or B0100-49. The root cause typically lies in faulty electronic components on the circuit board, such as SMD parts, power supply capacitors, or fuses. These defects prevent communication with diagnostic equipment and lead to the SRS warning light remaining constantly illuminated.

External factors like corrosion caused by moisture ingress or improper past repair attempts can also result in serious damage and increase repair complexity. Control unit 1375110080 is compatible with, and interchangeable with, OE numbers 46858203 and 1394332080.

How do you recognize a fault in Control Unit 1375110080?

A fault in Control Unit 1375110080 primarily manifests as a permanently illuminated airbag or SRS warning light on the instrument cluster. Additionally, diagnostic tools may be unable to establish communication with the control unit, or an internal error (e.g., error code B0100) may be detected.

The clearest symptom is the persistently lit airbag warning light. It does not extinguish after starting the vehicle, indicating a serious system malfunction and resulting in a significant deficiency during the next mandatory technical inspection.

Another common sign is the absence of communication. When a workshop attempts to read the fault memory, the diagnostic tool receives no response from the airbag control unit. This makes accurate fault analysis impossible and points to a deep‑seated electronic defect within the module itself.

If communication remains possible, error code B0100 or B0100-49 (internal ECU fault) is often recorded. This code indicates that the control unit has detected an internal fault. Even after an accident, stored crash data remains a clear cause that blocks functionality and keeps the warning light on.

Safety and Legal Notes on Repair

Work on the airbag system is safety‑critical and must be performed exclusively by trained professionals. Improper interventions, such as using simulators, are hazardous and can lead to the revocation of the vehicle’s operating permit. For some models, a final adjustment of the vehicle is required after reinstallation.

Removing and installing the airbag control unit requires specialized expertise to avoid unintended activation of the restraint systems. The system must first be de‑energized, a step that should always be carried out by a qualified workshop.

Deletion of crash data must comply with legal requirements and is documented by reputable repair shops. Using resistors or airbag simulators to bypass faults is not only illegal but also poses a significant safety risk to vehicle occupants.

Especially for newer vehicles such as the Fiat Ducato manufactured from 2014 onwards, it may be necessary to reprogram or recalibrate the repaired control unit after installation. This ensures proper communication with other control units in the vehicle.

In which vehicles is control unit 1375110080 installed?

The airbag control unit 1375110080 is primarily used in Citroën van models. It is fitted across various generations and facelifts of the Citroën Jumper III and its mechanically identical counterpart, the Citroën Relay III. Due to platform strategies, it can also be found in related models such as the Fiat Ducato.

At Airbag24, we repair control unit 1375110080 for the following models:

Citroën Jumper III (2006–2011), III 1st Facelift (2011–2014), III 2nd Facelift (2014–2024), III 3rd Facelift (2023–present)

Citroën Relay III (2006–2011), III 1st Facelift (2011–2014), III 2nd Facelift (2014–2024), III 3rd Facelift (2023–present)

How is control unit 1375110080 professionally repaired?

At Airbag24, repairs follow a standardized process: Upon receipt of the removed control unit, our technicians perform a thorough analysis, fix electronic faults at the component level, erase existing crash data, and conduct final functional tests. We provide a 12-month warranty on every repair.

The process ideally begins at your workshop with reading out the fault memory. The control unit is then removed according to the manufacturer’s specifications—disconnecting the vehicle battery is essential. Please send the module well-packaged along with a description of the fault or the diagnostic report.

Once received by Airbag24, the control unit undergoes an incoming inspection. Repair includes restoring the electronics on the circuit board, replacing defective SMD components, and professionally resetting the crash data. Firmware adjustments may also be performed if necessary.

Following successful repair and a final test, the control unit is returned to you. In some cases, after reinstallation, your workshop may need to permanently clear the fault memory in the vehicle or perform a brief adjustment to ensure complete system integration.

What shipping options are available?

Airbag24 offers flexible and secure shipping solutions. You can either send your defective control unit to us free of charge yourself or arrange a convenient UPS pickup. For returning the repaired unit, you have access to free standard UPS shipping as well as faster express options, including cash-on-delivery.

For sending the item to us, you have two choices: ship the package yourself or bring it in person. Alternatively, through our portal, you can book a UPS pickup at your preferred location and time.

For the return shipment, we offer several options to suit your needs:

Free standard UPS shipping (1–3 business days), UPS express shipping (1–2 business days), standard UPS shipping with cash-on-delivery, and UPS express shipping with cash-on-delivery. Of course, personal pickup at our premises is also available.