Airbag control unit with part number 1370978080

What is the function of Airbag Control Unit 1370978080?

The airbag control unit with part number 1370978080 is the central control module for the occupant protection system in vehicles such as the Peugeot Boxer, Citroën Relay, and Fiat Ducato. It processes signals from crash sensors in real time to precisely deploy airbags and seatbelt pretensioners during a collision. After a crash, it stores irreversible data, necessitating professional repair.

As the ECU (Electronic Control Unit) of the airbag system, this component continuously monitors all connected sensors and actuators, including acceleration sensors that detect a collision, as well as the ignition pyrotechnic devices of the airbags and seatbelt pretensioners. Its primary task is to assess the severity of a crash and activate the restraint systems accordingly.

A technical feature of this control unit is its storage of so‑called crash data. Once a collision is registered—even if no airbags deploy—this information is permanently saved in its internal memory. This data lockout prevents reuse without expert repair.

Why does control unit 1370978080 fail?

Failure of control unit 1370978080 is most often caused by stored, non‑erasable crash data following an accident, which locks the system. Other causes include internal hardware defects, moisture ingress into the vehicle’s footwell, or faulty ground connections on the control unit housing, leading to internal malfunctions.

The most common cause of malfunction is blockage due to stored crash data. After a collision, the unit writes a permanent error record into its memory that cannot be cleared using standard diagnostic tools. For safety reasons, the entire airbag system is then deactivated.

Internal hardware defects are another frequent source of failure. These may involve defective components on the circuit board, cold solder joints, or issues with the memory chip itself. Such defects are often attributable to aging, vibrations, or electrical disturbances within the vehicle’s electrical system.

External factors like moisture—often entering through leaks in the footwell—can cause corrosion at connectors and on the circuit board. Similarly, poor ground connections can result in erratic voltage readings and lead to lasting damage to the control unit.

This control unit is also known under alternative part numbers that are functionally identical, including: 1371008080, 1358992080, 46858203, 01370978080, and 01371008080.

How do you recognize a defect in 1370978080?

A defect in control unit 1370978080 primarily manifests as a permanently or intermittently illuminated airbag warning light on the instrument cluster. Often, communication with the control unit via an OBD diagnostic tool is also lost, preventing the reading of fault codes such as B0100 (internal error) and indicating a severe internal malfunction.

The most obvious symptom is the active airbag warning light, signaling a fault in the restraint system and clearly indicating that airbags would not deploy—or would not deploy correctly—in the event of a crash. Ignoring this warning poses a significant safety risk.

Another critical sign is complete loss of communication. If a workshop using a diagnostic device such as a Bosch or Gutmann tester cannot access the airbag control unit, there is usually a serious internal defect requiring immediate repair.

If fault codes can be read, specific codes point to the underlying cause. Typical codes include B0100 (internal ECU error, crash memory), B0102-00 (missing ground connection), B1000 (communication error), or B1001 (ECU functionality defective).

Additional symptoms may include a lit seatbelt warning indicator, a missing chassis number stored in the fault memory, or messages related to the fuel shut-off valve. For safety reasons, the use of airbag simulators or resistors is strongly discouraged, as this is life‑threatening and may result in the revocation of operating approval.

In which vehicles is control unit 1370978080 installed?

The airbag control unit 1370978080 is installed in numerous van models from Peugeot, Citroën, and Fiat. These include the Peugeot Boxer (Generation I through IV), the Citroën Relay (Generation I through III), and the Fiat Ducato (Series 244 and 290), including their facelifts and electric variants such as the e‑Boxer or E‑Ducato.

At Airbag24, we repair part number 1370978080 for the following vehicles:

Peugeot: Boxer I (1994–2002), Boxer II (2001–2006), Boxer III (2006–2011, plus facelifts from 2011–2014, 2014–2024, and from 2023 onward), Boxer IV, and e‑Boxer IV.

Citroën: Relay I (1994–2002), Relay II (2001–2006), Relay III (2006–2011, as well as facelifts from 2011–2014, 2014–2024, and starting in 2023).

Fiat: Ducato 244 (2001–2006), Ducato 290, and E‑Ducato 290.

How is the airbag control unit 1370978080 professionally repaired?

Professional repair of control unit 1370978080 restores its full functionality by erasing internal fault codes and crash data. At Airbag24, after you send in the unit, we inspect it, refurbish any defective hardware components, and reset the software to factory settings. We offer a 12-month warranty on all repairs.

The repair process ideally begins with a vehicle diagnosis. Reading out the fault memory using an appropriate diagnostic tool provides initial clues. Please include the fault log with the removed control unit when sending it in.

To remove the unit, disconnect the vehicle battery for at least 10 minutes. The control unit is often located beneath the dashboard. After releasing the connector—usually marked with a yellow button—and unscrewing the mounting bolts, you can carefully extract it.

Upon receipt at Airbag24, our technicians perform a thorough inspection. Repairs involve clearing internal crash data, resetting the software, and either repairing or replacing faulty electronic components on the circuit board. Our goal is to restore the unit to like-new condition.

After return shipping and reinstallation, be sure to erase the fault memory in the vehicle. In some cases, a brief programming procedure or coding may be required to ensure full synchronization with your car. We provide a 12-month warranty on all completed repairs.

What shipping options does Airbag24 offer?

For repairing your control unit, Airbag24 offers flexible shipping choices. You can either ship the package yourself free of charge or arrange convenient UPS pickup at your preferred location. For return shipping, you have the option of free standard UPS delivery, faster UPS Express shipping, or self-collection—each available also with cash-on-delivery.

For outbound shipping, you have two options: securely pack the removed control unit and send it to us yourself, or book a paid UPS pickup through our portal at your chosen time and location.

Once the repair is complete, we provide several return‑shipping options. Standard UPS delivery is free. If you prefer faster delivery, choose paid UPS Express shipping; both options are also available with cash-on-delivery. Of course, you can also pick up your repaired control unit in person at our facility.