Airbag control unit with part number 632199700C

What is the function of the airbag control unit 632199700C?

The airbag control unit 632199700C, manufactured by Autoliv and often associated with part number 985108564R, serves as the central control module for the entire occupant protection system in the Renault Kadjar I (2015–2022). It analyzes data from crash sensors, deploys airbags and seatbelt pretensioners during a collision, and stores relevant crash data.

As an SRS module (Supplemental Restraint System), it maintains continuous communication with all safety‑related components of the vehicle, including various airbags, seatbelt pretensioners, seat occupancy sensors, and acceleration sensors distributed throughout the car.

In the event of a collision, the control unit determines within milliseconds which restraint systems must be activated to provide optimal protection for occupants. Following such an event, crash data is permanently stored in the unit’s internal memory, which is a major cause of subsequent malfunctions.

Why does the control unit 632199700C fail?

The most common reason for failure of the control unit 632199700C is the retention of crash data after an accident, which intentionally locks the system. Other causes include electronic faults due to moisture, unsuccessful prior repair attempts, or wiring issues.

Once the airbags have deployed, the control unit self‑locks to prevent unintended re‑deployment. The stored crash data cannot be erased using standard diagnostic tools, necessitating professional repair or replacement.

Electronic components on the circuit board can also fail without any visible impact. Moisture ingress may lead to corrosion and short circuits, while defects in individual parts such as processors or memory chips can result in complete system failure.

It’s important to note that a lit airbag warning light can also stem from external issues like faulty wiring, connectors, seat occupancy mats, or sensors. Therefore, a thorough professional diagnosis before removing the control unit is essential.

How do you recognize a fault in the 632199700C?

A defective airbag control unit 632199700C primarily manifests as a continuously illuminated airbag warning light on the instrument cluster. Often, the unit cannot be read by a diagnostic tool (no communication) or error codes appear that cannot be cleared.

The clearest indication is the airbag warning light that fails to extinguish after the engine starts. This signals a critical fault in the safety system, preventing reliable airbag deployment in the event of a crash.

Another clear symptom is the lack of communication. When a workshop attempts to read the fault memory, no response is received from the control unit, indicating a severe internal malfunction.

In some cases, messages such as “Refer to the manual” appear on the display, or persistent error codes remain even after addressing the actual crash damage—typical signs of a device with stored crash data.

In which vehicles is the control unit 632199700C installed?

The airbag control unit with part number 632199700C was specifically developed by Autoliv for a particular vehicle series. At Airbag24, we professionally repair this module for the Renault Kadjar I, produced between model years 2015 and 2022.

This control unit is exclusively found in the following model:

Renault: Kadjar I (model years 2015–2022)

To ensure full compatibility, the part number on the defective unit must always match the one listed here—632199700C. The related part number 632199700E can also be repaired.

How is the 632199700C professionally repaired?

Professional repair of the 632199700C at Airbag24 includes precise electronic diagnostics, resetting the stored crash data, and replacing defective components. All repairs come with 2 years’ statutory liability for defects and a final test report.

Upon submission to Airbag24, the control unit undergoes a comprehensive initial inspection using state‑of‑the‑art diagnostic equipment. This identifies exact sources of failure on the circuit board, whether damaged circuits or faulty memory modules.

The core of the repair involves completely erasing the internal crash data and restoring the unit to factory settings. Defective electronic components are replaced with high‑quality original parts to ensure long‑term functionality.

Subsequently, a comprehensive functional test is performed to ensure that the control unit communicates flawlessly once again. The repaired control unit comes back with all vehicle data and is ready for use immediately after reinstallation — coding or programming is not necessary.