Airbag control unit with part number 985108680R

What is the function of the airbag control unit 985108680R?

The airbag control unit with part number 985108680R is the central control unit for the entire occupant safety system (SRS) in the Renault Talisman I. It processes data from impact sensors to precisely deploy airbags and seatbelt pretensioners in the event of a crash, thereby preventing serious injuries to occupants. It is typically located in the center tunnel near the gearshift lever.

As the brain of the passive safety system, this control unit’s primary task is to protect occupants from colliding with hard parts of the vehicle body during a collision. It continuously monitors vehicle dynamics and connected sensors to remain ready at all times.

Its placement inside the vehicle, in the tunnel next to the gearshift lever, protects the unit from direct damage in an accident while also ensuring it can receive and process critical signals. Due to its crucial role, a thorough inspection after every crash is mandatory—even if the airbag warning light is not illuminated.

Why does the control unit 985108680R fail?

The most common cause of failure or malfunction of the control unit 985108680R is the storage of crash data following an accident. This data permanently locks the unit, preventing further use. In addition, internal electronic faults can also lead to permanent malfunctions requiring repair.

After a collision—even if no airbags deployed—the unit stores what is known as a “crash event.” For safety reasons, this information remains stored indefinitely and can only be cleared using specialized tools. Simply erasing the fault memory via the OBD interface is not sufficient here.

Another defect manifests as the fault code “Airbag internal error,” indicating a malfunction of the internal electronics that requires professional diagnosis and component-level repair. Without proper restoration, the entire airbag system remains disabled.

How do you recognize a defect in the control unit 985108680R?

A defect in the control unit 985108680R is primarily indicated by the airbag warning light on the instrument cluster. This light either stays on continuously when the engine is running or illuminates for about 30 seconds after starting the engine before remaining lit. Diagnostic tools often display an internal error or stored crash data.

The clearest symptom is the persistently illuminated airbag warning light, signaling to the driver that the occupant protection system is either non-functional or only partially operational and may fail to deploy in the event of a crash.

Another specific sign is when the airbag light glows for approximately 30 seconds after starting the engine before switching to a steady-on state. This behavior often points to a particular self-test error within the control unit.

During workshop diagnostics, the error code “Airbag internal error” is frequently read. In other cases—especially after an accident—the display indicates stored crash data even though no airbags were deployed externally.

In which vehicles is the control unit 985108680R installed?

The airbag control unit with part number 985108680R is specifically designed for the first-generation Renault Talisman (I). At Airbag24, we professionally repair this module for all variants of this model series produced between 2015 and 2022.

At Airbag24, we service part number 985108680R for the following model:

Renault Talisman I (model years 2015–2022)

How is the control unit 985108680R professionally repaired?

Upon submission to Airbag24, the control unit 985108680R undergoes a meticulous incoming inspection. The repair focuses on safely resetting the stored crash data using specialized tools. Following repair, coding for the receiving vehicle is essential. All repairs come with 2 years' statutory liability for defects.

The repair process at Airbag24 begins with analyzing the submitted control unit. First, the fault memory is read to verify the exact cause of the malfunction—whether it’s an internal error or stored crash data.

The key step is the so‑called crash reset, where the crash data stored in the device’s memory chip is completely and securely erased using specialized programming equipment. This procedure restores the unit to its original functionality.

Only original parts, identical to those installed at the factory, are used for repair, ensuring full functionality and long-lasting performance of the control unit. A comprehensive functional test is performed before the unit is returned to the customer. Airbag24 provides 2 years' statutory liability for defects on the entire repair service.