Airbag control unit with part number 284A19197R

What is the function of the airbag control unit 284A19197R?

The airbag control unit with part number 284A19197R is the central control module for the passive safety system (SRS) in Dacia vehicles, particularly in the Duster II. It analyzes data from the acceleration sensors and, in the event of a crash, determines which airbags and seatbelt pretensioners need to be deployed to protect the occupants.

As the “brain” of the restraint system, this module continuously communicates with the crash sensors located at the front and sides of the vehicle, as well as with the seat occupancy sensors. Based on the severity and direction of the impact, it activates the appropriate protective mechanisms. This control unit is also known under the alternative part numbers 985100209R and A2C17352803, which are technically compatible.

Why does the control unit 284A19197R fail?

Failure of the control unit 284A19197R is most commonly caused by the storage of crash data after an accident. Other causes include internal electronic faults resulting from overvoltage or component aging, as well as damage due to moisture or water ingress, leading to corrosion on the circuit board and impairing functionality.

The most frequent cause is the unit becoming locked following a crash. The control unit stores crash data and, for safety reasons, locks itself. Reuse without professional reset is then impossible.

Internal hardware failures are also common. These can result from overvoltage in the vehicle’s electrical system, defective memory chips, or faulty processors. Such defects often trigger internal error codes like B1000, U1726, or the generic error 65535, indicating an irreparable issue within the device itself.

Environmental factors such as moisture penetration or water damage can likewise destroy sensitive electronics. Corrosion on the circuit board disrupts conductive traces and causes short circuits, potentially leading to complete failure of the module.

How do you recognize a defect in the 284A19197R?

The clearest symptom of a defect in the control unit 284A19197R is the SRS airbag warning light that remains steadily illuminated or flashes on the instrument cluster. Often, a diagnostic tool can no longer establish communication with the module, or specific error codes such as “Internal Error” (B1000, 65535) are read out.

An active airbag warning light represents a critical safety risk. It indicates that the entire airbag system is disabled and would not deploy in the event of a crash. Immediate inspection at a specialized workshop is therefore essential.

Another clear sign is when the control unit becomes inaccessible to diagnostic tools. The workshop cannot read error codes or establish a connection, pointing to a severe internal fault. The error code U1726 explicitly signals such a loss of communication.

In some cases, unusual accompanying symptoms may also appear, including a malfunctioning clock, faint glow from the speedometer illumination, or complete failure of the control unit when the vehicle interior heats up.

In which vehicles is the control unit 284A19197R installed?

The airbag control unit 284A19197R is primarily installed in various models of the Dacia brand. It is mainly found in the second-generation Dacia Duster, as well as in related models such as the Logan or Lodgy, underscoring its importance within the Renault/Dacia vehicle platform.

At Airbag24, we repair the control unit with part number 284A19197R, along with the compatible numbers 985100209R and A2C17352803, for the following specific models:

Dacia Duster II (2018–2021)

Dacia Duster II Facelift (2021–2024)

Dacia Duster Access II

This control unit, or a compatible variant, may also be installed in other Dacia models such as the Logan or Lodgy. Always verify the part number stamped on the housing of your removed unit.

How is the 284A19197R professionally repaired?

Professional repair of the control unit 284A19197R at Airbag24 involves a detailed analysis, targeted elimination of the root cause of the fault, and a final functional test. Whether crash data is erased or defective electronic components replaced, the goal is to restore full functionality according to the manufacturer’s specifications.

Upon receipt of the control unit at Airbag24, our technicians perform a comprehensive initial inspection. This includes reading the fault memory and examining the circuit board for visible damage such as corrosion or defective solder joints.

The next step is the actual restoration process. Stored crash data is securely erased at the chip level. In cases of hardware defects, faulty components—such as memory modules, processors, or other ICs—are carefully desoldered and replaced with new, high-quality parts.

Subsequently, the repaired control unit is tested on a specialized test bench. Here, real‑world vehicle operation is simulated to ensure that communication with all sensors and the deployment circuits function flawlessly. We provide 2 years' statutory liability for defects on every repair.