Airbag control unit with part number 985109244R

What is the function of the airbag control unit 985109244R?

The original Renault airbag control unit with part number 985109244R is the central control module of the occupant protection system. It processes data from crash sensors in real time and is responsible for precisely and reliably deploying airbags and seatbelt pretensioners in the event of a collision.

As an integral component of vehicle safety, this control unit continuously communicates with various sensors throughout the vehicle. It monitors acceleration and deceleration values to detect a collision and activate the appropriate restraint systems.

The proper functioning of this component is crucial to ensuring occupant protection according to the manufacturer’s specifications.

What defects occur in the 985109244R control unit?

The most common cause of failure for the 985109244R is the storage of crash data after an accident, which locks the unit. Other typical defects include internal errors signaled by fault codes such as B1080 or DTC907F, as well as complete communication failures with the vehicle diagnostic system.

Following a collision—even a minor one—so‑called crash data is stored in the control unit’s internal memory. This data locks the device and prevents further use, even if the vehicle’s mechanical damage has already been repaired. Clearing this data using conventional diagnostic testers is often impossible.

Internal errors, frequently indicated by fault codes B1080 (internal error) or DTC907F (internal error), point to issues within the unit’s electronics or software. These faults can also occur without any prior accident.

In some cases, communication between the airbag control unit and the vehicle’s onboard network completely breaks down. The unit then becomes inaccessible to diagnostic tools, complicating troubleshooting and often mistakenly suggesting a wiring problem.

How do you recognize a defective 985109244R control unit?

A defect in the 985109244R control unit is primarily indicated by the airbag warning light that remains constantly illuminated or flashes intermittently on the instrument cluster. Additionally, diagnostic tools may be unable to establish communication with the control unit, or specific fault codes may be read out.

The most obvious sign is the active airbag warning light. It alerts the driver that the restraint system is either non‑functional or only partially operational, potentially failing to deploy correctly in the event of a crash.

During a workshop diagnosis, the defect often manifests as an inability to access the control unit. The diagnostic tool will report “No Communication.” Alternatively, fault codes such as B1080 or DTC907F may appear in the fault memory, directly indicating an internal malfunction of the unit.

Even after replacing deployed components, such as the passenger airbag, a fault in the control unit may persist. In this case, the warning light does not extinguish because the crash data remains stored within the device.

In which vehicles is the 985109244R installed?

The original Renault airbag control unit with part number 985109244R is primarily used in Renault models. At Airbag24, we professionally repair this control unit for the vehicle series listed below, ensuring full functionality of the safety system.

Specifically, this control unit can be found in the following models:

Renault: Trafic II (model years 2001–2014), Trafic IV

What are the advantages of repairing the 985109244R?

Repairing the 985109244R offers significant cost savings compared to purchasing a new unit, which manufacturers typically price at over €500. Moreover, repair provides a sustainable and rapid solution that preserves the original configuration of the device and is backed by 2 years' statutory liability for defects.

The financial benefit is the key advantage. Professional refurbishment is considerably cheaper than buying a brand‑new control unit directly from the manufacturer, substantially reducing overall vehicle maintenance costs—especially after an accident.

Since the repair maintains or restores vehicle‑specific programming, there is no need for time‑consuming re‑programming or coding at the workshop. The repaired control unit can be reinstalled immediately.

Additionally, repair represents an environmentally friendly alternative, extending the lifespan of existing electronic components and helping to avoid electronic waste. With 2 years' statutory liability for defects on the work performed, repair offers a safe and reliable solution.

How does the repair process work at Airbag24?

The repair process at Airbag24 is designed for efficiency and safety. After you ship us the removed, unopened control unit, our technicians perform a thorough analysis, resolve the fault by clearing crash data or performing targeted reprogramming, and conclude the process with a functional test.

For a smooth procedure, please do not open the control unit before removal. Include the completed repair form and, if available, a printout of the fault memory with your package. This helps our technicians quickly identify and isolate the issue.

At Airbag24, depending on the nature of the fault, we either clear the crash data using specialized software, reprogram and recalibrate the device’s software, or replace defective internal components with genuine OEM parts. Each step is meticulously documented.

Following successful repair and final quality assurance, the control unit is returned to you insured. We provide 2 years' statutory liability for defects on every repaired unit.