Airbag control unit with part number A2C17351701

What is the function of the airbag control unit A2C17351701?

The airbag control unit A2C17351701 from Continental is the central control module for the occupant protection system, primarily installed in the Dacia Logan MCV II (2013–2020). It analyzes data from the acceleration sensors and, within milliseconds, determines whether to activate airbags and seatbelt pretensioners, ensuring passenger safety in the event of a crash.

As the “brain” of the passive safety system, part number A2C17351701 continuously monitors all relevant sensors and components. Its role is to reliably detect a collision, assess its severity, and deploy appropriate restraint systems.

This control unit is technically identical or compatible with part numbers 985106332R and 8200769222, which are also used in Dacia models. A properly functioning unit is essential for vehicle safety.

Why does the A2C17351701 control unit fail?

A failure of the A2C17351701 control unit is most commonly caused by stored crash data following an accident, which triggers a safety lock on the device. Other causes include internal electronic faults on the circuit board, damage from overvoltage, or moisture ingress—each potentially leading to hardware malfunctions and complete system failure.

After a collision, the control unit stores non-erasable crash event data as a safety feature, necessitating system inspection and repair. The unit becomes locked, and the airbag warning light illuminates.

Internal defects are another frequent cause. These involve hardware failures in components such as capacitors, processors, or memory chips. Error codes like 65535, 93F9, B1000, or general CAN bus errors directly indicate such internal malfunctions.

External factors, such as moisture damage from leaks in the vehicle or voltage spikes—for example, during improper jump-start procedures—can permanently harm the sensitive electronics on the circuit board.

How do you recognize a fault in the A2C17351701?

The clearest sign of a malfunctioning A2C17351701 control unit is the SRS airbag warning light that remains steadily illuminated or flashes in the instrument cluster. Often, a workshop can no longer communicate with the control unit, and specific internal error codes are stored in the fault memory, pointing to hardware issues.

An activated airbag warning light is a critical indicator. It signals that the entire restraint system is disabled, meaning airbags would not deploy in a crash. Prompt diagnosis is therefore vital for safety.

Another clear symptom is loss of communication: the control unit fails to respond to diagnostic equipment requests, making it impossible to read out error codes. This clearly isolates the fault to the control unit itself.

In addition, unusual electrical side effects may occur. According to technical analyses, these can include a faulty clock display, unexpectedly illuminated speedometer lighting, complete system failure when heated, or messages indicating insufficient supply voltage.

In which vehicles is the A2C17351701 installed?

The Continental airbag control unit A2C17351701 is specifically used in Dacia vehicles. It is predominantly found in the Dacia Logan MCV II model, produced between 2013 and 2020. Related part numbers 985106332R and 8200769222 also belong to this series.

At Airbag24, we repair the control unit with part number A2C17351701, as well as its equivalent variants, for the following specific model:

Dacia: Logan MCV II (model years 2013–2020)

The repair ensures that the vehicle’s original coding is preserved, eliminating the need for replacement and time-consuming reprogramming.

How is the A2C17351701 professionally repaired?

Professional repair of the A2C17351701 is a purely electronic process. Following a thorough initial inspection, stored crash data is erased, and internal hardware faults on the circuit board are identified. Defective components are expertly replaced, after which a comprehensive functional test is conducted to ensure proper communication and deployment capability.

Upon submission to Airbag24, the control unit undergoes a standardized repair procedure. First, a detailed analysis takes place, where the fault memory is read out and the hardware is inspected for visible damage caused by moisture or overvoltage.

In the next step, actual restoration begins. Specialized technicians erase crash data or rectify internal faults by replacing defective electronic components—such as capacitors, memory modules, or other semiconductors—on the circuit board.

Finally, the repaired control unit is tested on a specialized test bench. Here, communication with all sensors and the correct operation of the deployment circuits are simulated. You receive 2 years' statutory liability for defects on the completed repair.