Airbag control unit with part number 1670945480

What is the function of Airbag Control Unit 1670945480?

The airbag control unit with part number 1670945480 is an original manufacturer component (OEM) that serves as the central control unit for the occupant protection system in certain Peugeot models. It processes data from acceleration and pressure sensors to precisely and promptly deploy airbags and seatbelt pretensioners in the event of a crash.

As the “brain” of the safety system (SRS – Supplemental Restraint System), this module continuously monitors all connected components. It is responsible for detecting a collision, assessing its severity, and activating the appropriate restraint devices to provide optimal protection for occupants.

The internal electronics are specifically designed to operate reliably even under voltage fluctuations or extreme conditions. Therefore, flawless functionality is crucial for vehicle safety.

Why does Airbag Control Unit 1670945480 fail?

The most common cause of failure for control unit 1670945480 is crash or accident data stored in its internal memory after an airbag deployment. Other causes include internal hardware defects in electronic components such as the EEPROM chip, capacitors, or voltage regulators, as well as issues caused by corrosion or moisture.

After a crash in which the airbags or seatbelt pretensioners have deployed, the control unit permanently stores this information in a non-volatile memory area. This results in permanent system lockout and the illumination of the SRS warning light, even if visible damage to the vehicle has already been repaired.

Internal electronic defects represent another major source of failure. Components like the EEPROM memory (which stores configuration and crash data), capacitors, or voltage regulators can fail due to age or voltage spikes. These internal malfunctions are logged in the fault memory as specific B-codes.

External factors such as moisture ingress can lead to corrosion on the circuit board and connectors. Mechanical damage to connection pins or problems with the power supply—caused by a faulty battery or alternator—can also impair the control unit’s operation.

How do you recognize a defect in Control Unit 1670945480?

A defect in Airbag Control Unit 1670945480 primarily manifests as a constantly illuminated airbag or SRS warning light on the instrument cluster. Often, communication with the control unit via a diagnostic tool is no longer possible, or specific error codes such as B1000, B1003, or B1015 are stored.

The most obvious sign is the active SRS indicator light, signaling that the safety system is not operational and may fail to deploy in the event of a crash.

Another clear symptom is when a workshop cannot establish communication with the airbag control unit using a diagnostic device. The module fails to respond to queries, indicating a serious internal malfunction.

If error codes can be read, they often provide precise indications: Code B1000 points to a general communication error, B1003 to a defect in the internal EEPROM memory, and B1015 to a general internal module fault. Codes such as B1649 may also indicate a crash-data entry.

In which vehicles is Control Unit 1670945480 installed?

The airbag control unit with part number 1670945480 is used as an original part in Peugeot vehicles. It is specifically designed for newer generations of the Peugeot 508 and its station wagon variant. At Airbag24, we offer professional repair services for this control unit.

At Airbag24, we repair part number 1670945480 for the following models:

Peugeot: 508 II (2018–2023), 508 II Facelift (2023–2025), as well as the corresponding station wagon variant, 508 SW II.

How is Control Unit 1670945480 professionally repaired?

Professional repair of Control Unit 1670945480 at Airbag24 includes a detailed electronic diagnosis, targeted hardware restoration, and a final functional test. Depending on the nature of the fault, crash data is erased, defective components such as EEPROMs or capacitors are replaced, and all functions are verified.

Upon receipt of the control unit at Airbag24, our technicians first conduct a comprehensive analysis. Using specialized diagnostic equipment, they read out the fault memory and visually inspect the circuit board for corrosion or mechanical damage.

If crash data is present, it is securely and completely removed using specialized software and EEPROM programmers. For hardware defects, faulty SMD components—such as capacitors, resistors, or voltage regulators—are professionally desoldered from the board and replaced with new, high-quality parts.

After repair, a comprehensive functional test is performed on a test bench that simulates real‑world vehicle conditions. The fault memory is read again to ensure all errors have been resolved. We provide 2 years' statutory liability for defects on every repair.