Airbag control unit with part number MR587417

What is the function of the airbag control unit MR587417?

The airbag control unit MR587417, often manufactured by Bosch under part number 0285001685, serves as the central control module for the passive safety system in various Mitsubishi Colt models. It processes signals from acceleration sensors to detect a collision and activates the corresponding restraint systems, such as airbags and seatbelt pretensioners.

As the brain of the Supplemental Restraint System (SRS), the module continuously monitors all connected components, from crash sensors to the airbag igniters. It ensures that, in the event of an accident, a response occurs within milliseconds to provide optimal protection for occupants.

This part number is also known by the designations MR587417DPSB or MR587759DPSCB. The Bosch part number 0285001685 is an important cross-reference that confirms compatibility, identifies the manufacturer of the electronic system, and facilitates diagnosis and repair.

Why does the MR587417 control unit fail?

The most common cause of failure for the MR587417 is the storage of crash data after an accident, which locks the control unit. In addition, internal electronic faults can lead to malfunctions, indicated by persistent error codes such as 65535 (control unit defective) or 93F9 (internal error), often resulting from aging or electrical damage.

Following a crash, so‑called crash data is permanently stored in the control unit’s memory. This is a manufacturer‑imposed safety measure designed to prevent reuse without professional inspection and repair. Simply clearing the error codes using a diagnostic tool is not sufficient in this case.

Further defects may occur directly on the circuit board, including issues with the power supply, malfunctions in the CAN‑bus controller leading to communication problems, or faulty memory chips. Such hardware failures can manifest as error codes like B1000 (no communication) or the generic code 65535.

How do you recognize a defective MR587417?

A defect in the MR587417 airbag control unit primarily shows up as the airbag warning light remaining constantly illuminated or flashing intermittently on the instrument panel. Another clear indication is the lack of communication with a diagnostic tool, preventing workshops from reading or clearing error codes—signaling a serious internal fault.

The most obvious symptom is the active airbag warning light, alerting the driver that the restraint system is not functioning properly and may fail to deploy in the event of an accident.

If the control unit no longer responds to diagnostic requests, this strongly suggests a complete breakdown of its communication electronics. The error code B1000 stored in the fault memory confirms this condition.

Specific, non‑erasable error codes such as 65535 (control unit defective) or 93F9 (internal error) are also direct indicators of hardware failure inside the module. In rare cases, unusual electrical phenomena may appear, such as the speedometer illumination when locking the vehicle.

In which Mitsubishi models is the MR587417 installed?

The airbag control unit with part number MR587417 is mainly used across various generations of the Mitsubishi Colt. This includes older series like the Colt CA as well as newer models from the CB, CC, and CZ lines, including facelifted versions. At Airbag24, we repair this control unit for the entire model range.

At Airbag24, we have experience repairing the MR587417 control unit for the following specific Mitsubishi models and series:

Mitsubishi Colt CA (model years 1992–1996) Mitsubishi Colt CB Mitsubishi Colt CC Mitsubishi Colt VI (Z30) Mitsubishi Colt CZ (model years 2004–2008) Mitsubishi Colt CZ Facelift (model years 2008–2012), including the CZ3 variant

Due to the use of equivalent part numbers such as 0285001685 and MR587417DPSB, it is essential to verify the part number directly on the device before removal to ensure proper identification.

How does the repair of the MR587417 proceed at Airbag24?

After sending the removed control unit to Airbag24, our technicians perform a comprehensive diagnosis to pinpoint the exact cause of the fault. The repair process includes professional reprogramming to clear error codes and crash data, and, if necessary, replacement of defective electronic components on the circuit board to restore full functionality.

The process begins with the careful removal of the control unit from the vehicle. You then ship it securely packaged to our workshop.

Upon receipt, a detailed analysis is performed. We read the internal memory and inspect the hardware components. This ensures that not only symptoms (such as error codes) are cleared, but the actual root causes (e.g., a defective processor or voltage regulator) are resolved.

The repair combines software and hardware interventions. Stored crash data is erased, and the software is restored to its factory settings. Defective parts are replaced with high-quality aftermarket components. Final tests confirm flawless functionality before the unit is returned to you. We provide 2 years' statutory liability for defects on every repair.