Airbag control unit with part number 8200491655

What is the function of the airbag control unit 8200491655?

The airbag control unit with part number 8200491655 is the central control module for the passive safety system in the Renault Twingo II (model years 2007–2014). As a Restraint Control Module (RCM), it processes data from crash sensors and is responsible for precisely deploying airbags and seatbelt pretensioners in the event of an accident.

This specific control unit, manufactured by Temic or Autoliv, coordinates all components of the restraint system. It continuously monitors system readiness and ensures that all sensors, airbags, and seatbelt pretensioners function correctly to guarantee occupant protection at all times.

Proper functionality is critical, as a malfunction can disable the entire safety system. The control unit communicates via the CAN bus with other vehicle systems and reports its status to the instrument cluster.

Why does the airbag control unit 8200491655 fail?

The most common causes of failure for control unit 8200491655 are internally stored crash data after an accident, which prevent further use, as well as electronic defects in internal components. These hardware faults often result in complete communication failure or the permanent activation of the airbag warning light, indicated by error codes such as B1206.

Following a collision, the unit stores accident-related data and locks itself for safety reasons. This lock typically cannot be reset by a workshop through the OBD interface; instead, specialized electronic repair is required.

Another frequent cause is hardware failure itself, including malfunctions of microcontrollers, capacitors, or other board-mounted components—sometimes triggered by moisture ingress. Such damage leads to intermittent or persistent malfunctions.

This control unit is also known under equivalent part numbers 8201236035, 8200896814, 8201030307, 8201129032, 8201217512, 8201217502, and 402787B7. A fault with any of these numbers manifests with identical symptoms.

How do you recognize a defect in control unit 8200491655?

A defect in control unit 8200491655 primarily presents as a permanently illuminated or intermittently flashing airbag warning light on the Renault Twingo II’s instrument cluster. Another clear sign is when the control unit becomes unreachable via diagnostic equipment, making fault diagnosis at a workshop impossible.

The most prominent symptom is the active airbag warning light, signaling a critical fault in the restraint system that fails to extinguish after engine start-up as expected.

Often, no connection can be established with the control unit. Workshops then cannot read out error codes or attempt clearing procedures because the unit no longer responds to diagnostic requests.

In rarer cases, additional electronic issues may arise, such as a non-functioning clock, complete device failure upon heating, or a blinking engine check light attributable to an internal fault within the airbag module.

A specific indication of a severe malfunction is error code B1206 stored in the fault memory, directly pointing to an internal defect requiring specialized repair.

In which vehicles is control unit 8200491655 installed?

The airbag control unit with part number 8200491655, along with its technically identical variants, is specifically designed for the Renault Twingo II of the CN0_ series. At Airbag24, we repair this control unit for all engine types and trim levels of the Twingo II produced between 2007 and 2014.

At Airbag24, we offer professional repair services for the control unit installed in the following model:

Renault: Twingo II (CN0_ series, model years 2007–2014)

Compatibility is also ensured for replacement part numbers 8201236035, 8200896814, 8201030307, and others, as these are technically identical and were used in the same vehicle model.

How is control unit 8200491655 professionally repaired?

At Airbag24, repairing control unit 8200491655 follows a standardized process. Following an initial analysis, stored crash data is erased depending on the nature of the fault, defective electronic components on the circuit board are replaced, and software is reprogrammed if necessary. Final tests ensure full operational capability.

It is recommended to have the control unit inspected at a specialized workshop before removal to rule out external components such as sensors or wiring. Ideally, send the unit together with a diagnostic report.

Upon arrival at Airbag24, the control unit undergoes a thorough analysis. Repairs are performed at the component level: technicians replace defective parts such as microcontrollers or capacitors and address any damage to the circuitry.

A key part of the repair process is resetting the internal memory to completely erase crash data. After restoration, the device is rigorously tested to ensure it communicates and functions flawlessly once again. We provide 2 years' statutory liability for defects on every repair.