Airbag control unit with part number 550 54 15 00

What is the function of the airbag control unit 550 54 15 00?

The airbag control unit with part number 550 54 15 00, manufactured by Autoliv for PSA/Peugeot, is the central control unit for the occupant protection system. It processes signals from crash sensors and deploys airbags and seatbelt pretensioners in the event of a collision. Additionally, it stores relevant crash data, which results in the unit being locked out.

As an original part from PSA/Peugeot, this control unit was primarily installed in the Peugeot 206. Its main task is to continuously monitor the functionality of all connected components, such as airbags, seatbelt pretensioners, and sensors. Once the system detects a fault or a crash, the airbag warning light on the instrument cluster illuminates to alert the driver.

After a collision—even if only the seatbelt pretensioners were activated—the control unit records so‑called crash data. This data locks the system and prevents further use until professional repair and data reset have been performed. This safety‑related feature mandates a full system check after any accident.

Why does the airbag control unit 550 54 15 00 fail?

The most common cause of failure for the 550 54 15 00 control unit is the storage of crash data following a collision. Other causes include internal electronic defects that lead to communication issues, persistent error codes such as FC-160, or malfunctions in the driver’s airbag ignition circuit. In many cases, repair is the most cost‑effective solution.

Following an accident where seatbelt pretensioners or airbags were deployed, the control unit becomes internally locked. The fault memory can no longer be cleared, and the airbag warning light remains illuminated. This lockout is not a malfunction but a manufacturer‑specified safety mechanism that can only be解除ed through specialized repair.

In addition to stored crash data, age‑related defects may occur in electronic components such as processors or memory chips. These often manifest as an inability to communicate with diagnostic equipment or as persistent errors—such as those related to the ignition circuit or the driver’s airbag igniter—that cannot be erased.

This control unit is also known under alternative part numbers 96 352 688 80 AK, 96 368 940 80 AR, and 9636894080. The fault patterns are identical across these variants, as they are technically equivalent.

How do you recognize a defect in the 550 54 15 00 control unit?

A defect in the 550 54 15 00 airbag control unit is primarily indicated by the airbag warning light on the dashboard, which remains steadily lit or flashes intermittently. Another clear sign is that workshops cannot establish communication with the control unit using their diagnostic equipment, or that the fault memory cannot be cleared after an accident.

The most obvious symptom is the active airbag warning light, signaling a fault in the restraint system—a safety‑critical issue that will result in a failing inspection during the main vehicle examination.

Often, a qualified workshop is unable to connect to the airbag control unit. The unit fails to respond to diagnostic requests, making precise fault analysis difficult and usually pointing to an internal defect within the control unit itself.

A further typical scenario occurs after a collision: even though visible damage has been repaired, the fault memory in the airbag control unit cannot be cleared. This is due to the stored crash data that locks the device and requires specialized repair.

In which vehicles is the 550 54 15 00 control unit installed?

The 550 54 15 00 airbag control unit was specifically developed for Peugeot models. At Airbag24, we primarily service this control unit for the first‑generation Peugeot 206, covering both pre‑facelift and facelift versions, as it was originally supplied by Autoliv for these vehicles.

At Airbag24, we have successfully diagnosed and repaired this control unit for the following models:

Peugeot: 206 I (model years 1998–2003) and 206 I Facelift (model years 2003–2009)

How does repair work at Airbag24?

The repair process at Airbag24 begins with removing the defective control unit from the vehicle. Upon receipt, a thorough analysis is conducted. The core of the repair involves clearing the crash data, reprogramming the unit, and replacing any faulty components. Final tests confirm full functionality, backed by a 12‑month warranty.

For a successful repair, it is essential that the control unit be sent to us unopened. Attempting repairs yourself may result in irreparable damage. Please include a completed repair form with a detailed description of the fault when sending the unit.

Upon receipt at Airbag24, our technicians perform a professional diagnostic test to identify the exact cause of the fault. Subsequently, the stored crash data is securely erased and the fault memory reset. If necessary, defective electronic components such as sensors or memory chips are replaced with new, high-quality parts.

Following repair, the control unit undergoes a comprehensive functional test to verify correct communication and operation across all system areas. We provide a 12-month warranty on every repair.

What shipping options are available at Airbag24?

To send your control unit to Airbag24, you can either ship it yourself free of charge or arrange a convenient UPS pickup at your preferred location. For return shipping, we offer free standard UPS delivery as well as optional UPS Express service, both with cash-on-delivery options, or you may choose to pick up the unit in person at our facility.

Shipping to Airbag24:

You can carefully package the control unit and send it to us directly. Alternatively, you can use our portal to schedule a UPS pickup, which will collect the package from an address of your choice.

Return shipping from Airbag24:

After successful repair, we return your control unit via free standard UPS delivery (1–3 business days). If you require faster delivery, UPS Express service (1–2 business days) is available. Both options can also be arranged as cash-on-delivery shipments. Alternatively, you may pick up your device in person at our premises.