Airbag control unit with part number X6T42471

What is the function of the airbag control unit X6T42471?

The airbag control unit with part number X6T42471, also known as the SRS module, is the central control unit for the occupant protection system (Supplemental Restraint System) in Mitsubishi Colt models. It processes signals from crash sensors, deploys airbags and seatbelt pretensioners in the event of a collision, and continuously monitors the functionality of all connected components.

As the brain of the safety system, this module analyzes data from the vehicle’s acceleration sensors. If the values exceed a predefined threshold indicating a collision, the control unit sends ignition pulses to the corresponding airbags and seatbelt pretensioners.

In addition, the control unit performs a self-test at every vehicle start-up and manages the airbag warning light on the dashboard. The unit is also known under the alternative OEM numbers MR359828 and DPS and plays a crucial role in passive vehicle safety.

What defects occur in X6T42471?

The most common defect in the X6T42471 control unit is the storage of crash data after an accident, which results in irreversible locking of the module. Other causes include internal hardware failures on the circuit board, faulty wiring, or loose connectors, leading to persistent error codes and communication issues.

After a collision—even minor accidents without airbag deployment—the so‑called crash data is stored in the control unit’s internal memory. This data blocks the module’s functionality and cannot be erased using standard workshop diagnostic tools. The airbag warning light remains illuminated, and the system is disabled.

Besides stored crash data, electronic components on the circuit board may also fail. Defects in the internal power supply, processors, or memory chips can likewise cause total failure. External factors such as damaged wire harnesses or corroded connectors to the SRS components can also impair functionality and must be considered during diagnosis.

How do you recognize a defect in the X6T42471 control unit?

A defective X6T42471 airbag control unit almost always manifests as a permanently illuminated airbag warning light (SRS light) on the dashboard. Additionally, specific error codes are often stored in the fault memory, indicating an internal control unit malfunction or communication problems that cannot be cleared.

The primary and unmistakable symptom is the active SRS warning light. Unlike usual, it does not extinguish after starting the engine but remains lit continuously, signaling a critical fault in the restraint system.

During a workshop diagnosis, the defect appears as error codes directly pointing to an “internal fault” or “crash data stored.” In some cases, the control unit becomes unresponsive, making communication via the OBD interface with a diagnostic tool impossible.

In which vehicles is the X6T42471 control unit installed?

The X6T42471 airbag control unit is specifically installed in various model series of the Mitsubishi Colt. These include the Colt CB and Colt CJ generations from 1996 to 2003, as well as the Colt CZ from 2004 to 2008 and its facelift model produced from 2008 to 2012.

At Airbag24, we offer repairs for the control unit with part number X6T42471 and related numbers MR359828 and DPS, providing targeted options for multiple Mitsubishi models. Compatibility spans several Colt generations, including the Colt CB, Colt CJ (1996–2003), Colt CZ (2004–2008), and the CZ facelift (2008–2012).

How is the X6T42471 control unit repaired?

Professional repair of the X6T42471 at Airbag24 begins with a detailed diagnosis to identify the root cause of the fault—whether it’s stored crash data or hardware defects. Next, the crash data is removed via software, and if necessary, electronic components on the circuit board are refurbished. A final functional test ensures full operability.

Upon submission to Airbag24, each control unit undergoes a standardized process. First, the fault memory is read to pinpoint the exact cause. Often, the initial step involves professionally erasing the stored crash data, thereby reactivating the module.

If analysis reveals additional hardware defects on the circuit board, experienced technicians inspect and replace the affected components appropriately. Following completion of the repair, a comprehensive functional test confirms that the control unit operates flawlessly once again. All repairs come with 2 years' statutory liability for defects.