Airbag control unit with part number 985106142R

What is the function of the airbag control unit 985106142R?

The airbag control unit 985106142R is an original SRS (Supplemental Restraint System) control module from Renault. It continuously monitors all components of the occupant protection system—such as crash sensors, airbags, and seatbelt pretensioners—and, in the event of a collision, determines within milliseconds whether to deploy them, ensuring the safety of vehicle occupants.

As the central control unit, this device serves as the brain of the passive safety system. It constantly receives and processes data from various acceleration sensors distributed throughout the vehicle to detect an impending collision and assess its severity.

Based on this analysis, the control unit precisely activates the necessary restraint systems. This ensures that, in a real‑world accident, the appropriate airbags and seatbelt pretensioners are deployed at the optimal moment to minimize injuries.

Why does the control unit 985106142R fail?

The most common cause of failure for the 985106142R control unit is stored crash data following an accident, which the system locks out for safety reasons. Other potential defects include electronic failures due to aging, leading to internal malfunctions or complete loss of communication with diagnostic tools.

After an airbag deployment, a permanent entry is recorded in the control unit’s internal memory, known as “crash data.” This lockout is a manufacturer‑imposed safety feature designed to prevent re‑use of a potentially damaged component. A professional repair can selectively reset this memory.

Electronic faults represent another frequent source of issues. Over time, components on the circuit board—such as sensors or memory chips—can fail due to thermal stress and aging, resulting in internal errors that compromise the proper functioning of the entire airbag system.

Similar fault patterns also appear in related part numbers, such as 985100394R (Renault/Continental), A3C02510503, 985104418R, 985101902R, and 985107930R, since these parts are often used across vehicles built on similar platforms.

How do you recognize a defect in the 985106142R?

A defective 985106142R control unit primarily manifests as a permanently illuminated airbag warning light (SRS indicator) on the instrument cluster. Another clear sign is when the control unit becomes unresponsive via the OBD interface, preventing the workshop from performing diagnostics.

The most noticeable symptom is the persistently lit SRS warning light. It fails to extinguish after starting the vehicle, indicating a serious, safety‑critical system error that requires immediate inspection.

An additional critical issue is the lack of communication: if a diagnostic tool cannot establish a connection with the airbag control unit, this strongly suggests an internal hardware failure within the device itself. The root cause remains undetectable, complicating diagnosis.

In which vehicles is the 985106142R installed?

The airbag control unit 985106142R is mainly fitted in commercial vehicles and vans from Renault, Opel, and Fiat. These include various generations of the Renault Trafic, the Opel Vivaro B, and the Fiat Talento, where this control unit manages the restraint system.

At Airbag24, we repair part number 985106142R and compatible variants for the following models:

Renault: Trafic I (1980–2001), Trafic II (2001–2014), Trafic III (2014–present), and Trafic IV

Opel: Vivaro B (2014–2019)

Fiat: Talento 296 (2016–2021)

How does Airbag24 repair the 985106142R?

At Airbag24, repairing the 985106142R follows a professional process. Upon submission, the unit undergoes electronic analysis to pinpoint the exact cause of the fault. Next, crash data is erased, defective components replaced, and the unit reset before a final functional test confirms full operational readiness.

After removal at a specialized workshop, the control unit is sent to Airbag24. Here, a thorough incoming inspection identifies the precise defect—whether it’s a stored crash record or a hardware issue on the circuit board.

The actual repair involves professionally erasing crash data or replacing faulty electronic components. Finally, each control unit is tested on a dedicated test bench to verify the correct operation of all systems. This process eliminates the need for costly new purchases and complex programming in the vehicle.

We provide 2 years' statutory liability for defects on all repairs performed.