Airbag control unit with part number 9678656380

What is the function of the airbag control unit 9678656380?

The airbag control unit with part number 9678656380 is the central control module for the passive safety system in various Peugeot 508 models. It processes signals from crash sensors and determines whether to deploy airbags and seatbelt pretensioners, thereby protecting occupants in the event of a collision.

As an ECU (Electronic Control Unit) for airbags, this component is responsible for continuously monitoring the entire restraint system. It checks the functionality of all connected components, such as airbag modules, seatbelt pretensioners, and sensors. In the event of a collision, the control unit analyzes incoming data within milliseconds and activates the necessary safety devices.

The part number 9678656380 has been installed across multiple vehicle generations in the Peugeot 508 and its body variants, including the SW (station wagon) and RXH. This underscores its technical relevance from the first generation (from 2010) through to the current second generation (up to 2025).

Why does the control unit 9678656380 fail?

The most common causes of failure for the control unit 9678656380 are electronic faults such as short circuits, undervoltage due to a defective battery or alternator, and cable breaks. Another widespread cause is the storage of crash data after an accident, which locks the unit.

Electrical malfunctions on the circuit board are a primary source of failure. Short circuits or persistent undervoltage conditions can permanently damage internal components, especially memory chips and processors. Such defects often result in complete loss of communication or internal errors that are logged in the fault memory.

After an accident in which the airbags have deployed, so‑called crash data is recorded in the control unit’s memory. This is a safety measure designed to prevent reuse without professional inspection and reset. In this state, the control unit is locked and displays a permanent error, even if the hardware itself remains undamaged.

Diagnostically, these faults typically manifest as specific error codes. For the part number 9678656380, typical codes include B1000, which directly indicates an internal fault in the control unit, and U1F00, signaling a general communication error with the device.

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

A defect in the control unit 9678656380 usually shows up as a constantly illuminated airbag warning light on the dashboard. Accompanying this may be error messages displayed on the vehicle’s screen, and the fault memory cannot be cleared using diagnostic tools.

The clearest symptom is the persistently lit airbag warning light. It does not turn off after starting the engine, indicating a serious, system‑critical fault reported by the control unit itself.

Often, text messages appear on the vehicle’s information display pointing to a fault in the airbag system and prompting the driver to consult the owner’s manual or visit a workshop.

Another clear indication is when a specialized workshop is unable to clear the fault memory. Even after addressing external causes, the error code remains stored in the control unit, suggesting an internal defect or locked crash data.

In some cases, communication with the control unit is completely severed. A diagnostic tool can no longer establish a connection, complicating troubleshooting and often serving as a direct sign of total failure of the control unit.

Important note: Before removal, a qualified workshop should verify whether the fault truly lies within the control unit. External causes, such as faulty sensors or wiring issues, must be ruled out to avoid misdiagnosis.

In which vehicles is part number 9678656380 installed?

The airbag control unit with part number 9678656380 is specifically designed for various models and generations of the Peugeot 508. It is used in both the sedan and station wagon variants (SW and RXH).

At Airbag24, we offer expert repair services for the airbag control unit 9678656380 for the following Peugeot models:

- Peugeot 508 I Sedan and SW Station Wagon (model years 2010–2018, including facelift models from 2014 onward)

- Peugeot 508 II Sedan and SW Station Wagon (model years 2018–2025, including facelift models from 2023 onward)

- Peugeot 508 RXH I (model years 2010–2018, including facelift models from 2014 onward)

Is it worth repairing the control unit 9678656380?

Yes, repairing the control unit 9678656380 is a highly cost‑effective alternative to purchasing a new unit. While a new control unit can cost up to 800 euros, professional refurbishment is significantly more affordable and restores full functionality.

The biggest advantage lies in the significant cost savings. Compared to a new part from the manufacturer, which can range from 750 to 800 euros depending on the model, repair costs are considerably lower. This protects your budget without compromising safety.

A professionally repaired control unit functions just like a new one. Reputable service providers also offer an extended warranty of up to 24 months on their work, providing added confidence and assurance in the quality of the repair.

During the repair process, not only are the immediately defective components restored; often, other wear-prone parts are replaced preventively as well, enhancing the control unit’s longevity and helping to prevent future failures.

How does the repair process at Airbag24 work?

The repair process at Airbag24 is standardized and transparent. Following a professional diagnosis and removal at a workshop, the defective control unit is securely packaged and sent to Airbag24 along with a repair form.

Upon receipt of the package, Airbag24 technicians conduct a detailed analysis to pinpoint the exact cause of the fault. This is followed by professional restoration, where faulty components are replaced or crash data is erased. All repairs are performed according to the highest quality standards.

After successful repair, the control unit undergoes a comprehensive functional test to ensure it operates flawlessly once again. Only after passing this final inspection is the device returned to the customer. A 12-month warranty covers all repairs.

In addition to conventional repair, alternative options are available, including exchange for certified, fully functional used parts or specialized services that focus exclusively on erasing crash data.

What service and shipping options are available?

Flexible service and shipping methods are offered for repairing control unit 9678656380. You can either send the defective part yourself, use a pick-up service, or arrange an on-site repair through our specialized partners.

For shipping to Airbag24, you can drop off the package at the post office yourself or book the convenient UPS pick-up service, which collects the package directly from your preferred location. After repair, returns are equally flexible, tailored to your preferences.

For return shipping, you have the choice between free and paid options: UPS standard shipping (free), UPS express shipping, and both variants with cash-on-delivery. Alternatively, personal collection is also possible.

As an alternative to postal processing, some specialized workshops—such as those in the Düren region (North Rhine-Westphalia)—offer direct on-site repairs. With prior appointment, restoration can often be completed within two to three hours, provided no special replacement parts need to be ordered.