Airbag control unit with part number 9652712180

What is the function of the airbag control unit 9652712180?

The airbag control unit 9652712180 is the central control module of the occupant protection system in Peugeot 307 models. As an original OEM part from Siemens, it processes data from crash sensors and is responsible for precisely and reliably deploying airbags and seatbelt pretensioners in the event of a collision.

In detail, this unit continuously monitors all safety‑related components of the restraint system, including front and side airbags, seatbelt pretensioners, as well as acceleration and pressure sensors distributed throughout the vehicle.

In the event of a collision, the microprocessor inside the control unit determines within milliseconds which restraint devices need to be activated to provide optimal protection for occupants. It is manufactured as an original Siemens part and is compatible with alternative part numbers such as Autoliv 603724900 or Siemens 5WK42908.

Why does the control unit 9652712180 fail?

The most common cause of failure is the storage of crash data after an accident, which can lock the control unit. Similarly, internal electronic faults lead to communication errors or non‑erasable fault codes. Such malfunctions may also occur even without a prior collision.

After a crash, the control unit stores so‑called crash data in its internal memory. This permanent storage serves as a safety measure to prevent reuse of a potentially damaged system. As a result, the system becomes locked, and the airbag warning light remains illuminated.

Independently of accidents, purely electronic faults can also arise—such as internal software or communication issues that make diagnosis via the OBD port impossible or cause persistent fault codes to be stored, even though the associated components (e.g., airbags) are intact.

Additional sources of failure include external influences like water ingress, often occurring near the spare‑tire well. Short circuits in the vehicle’s electrical system, sustained undervoltage due to a faulty battery or alternator, or cable breaks can likewise damage the control unit’s sensitive electronics.

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

A defect in the control unit 9652712180 primarily manifests as a permanently illuminated or intermittently flashing airbag warning light on the instrument cluster. Other reliable indicators include lack of communication with diagnostic equipment and fault codes that cannot be cleared.

The most obvious symptom is the persistently lit airbag warning light, which fails to extinguish after starting the vehicle, signaling a serious fault in the safety system requiring immediate inspection.

Another clear sign is when the workshop’s diagnostic tool cannot establish communication with the airbag control unit. The device is “unreachable,” blocking troubleshooting and often pointing to an internal malfunction within the control unit itself.

Often, fault codes related to specific components—such as the driver’s airbag, seat airbag, or a crash sensor—are stored in the fault memory and remain unerased. Even after replacing these parts, the error persists, indicating that the root cause lies within the control unit itself.

In which vehicles is the control unit 9652712180 installed?

The Siemens airbag control unit with part number 9652712180 was specifically developed for various versions of the Peugeot 307. At Airbag24, we professionally repair this control unit for the first generation of the model, including the facelifted version.

At Airbag24, we repair part number 9652712180 for the following Peugeot models:

Peugeot 307 I (model years 2001–2005)

Peugeot 307 I Facelift (model years 2005–2009)

Peugeot 307 SW I (model years 2001–2005)

Peugeot 307 SW I Facelift (model years 2005–2009)

Is repairing the control unit 9652712180 worthwhile?

Yes, repair is the most cost‑effective solution. Compared to a new unit, which can cost between 700 and 800 euros, you can save up to 80%. You receive your original, vehicle‑specific control unit fully functional, complete with 2 years' statutory liability for defects.

The key advantage lies in substantial cost savings. While a new unit typically costs 700–800 euros according to the manufacturer, repair offers a significantly more affordable alternative without compromising safety or functionality.

Repairing the unit ensures that the original control unit remains in the vehicle, eliminating potential compatibility issues or time‑consuming re‑coding required when replacing the device. The repaired unit can usually be reinstalled directly.

Two years' statutory liability for defects is provided on every repair performed. This gives you the confidence of receiving a reliable and long-lasting solution for your defective airbag control unit.

How is the control unit professionally repaired at Airbag24?

After being sent to Airbag24, the control unit undergoes a thorough professional analysis. The repair focuses on reprogramming the memory to erase crash data and resolve software errors. Finally, full functionality is verified and confirmed with 2 years' statutory liability for defects.

Before removal, ensure in a specialized workshop that the fault is indeed attributable to the control unit. Ideally, include a diagnostic report with your package. Important: Always disconnect the vehicle battery prior to removal to prevent accidental airbag deployment.

Upon receipt, Airbag24 conducts a detailed inspection of the unit. At the heart of the repair is manipulation of the internal memory, where all stored crash data is completely erased and any software issues that block communication or trigger error messages are corrected.

If there is hardware damage to electronic components such as sensors, these can also be replaced upon agreement. Following successful repair, the control unit undergoes a functional test to guarantee flawless operation.