Airbag control unit with part number MR587757

What does the airbag control unit MR587757 do?

The airbag control unit MR587757 is the central control unit of the restraint system (SRS) for Mitsubishi. It evaluates the signals from the crash sensors, decides within milliseconds in an accident which airbags and seatbelt pretensioners are triggered, and monitors the system continuously. It reports faults via the airbag warning light.

The supplier number Bosch 0285001686 is also printed on the housing.

After an accident, the unit stores crash data and locks itself. Only the repair lifts this lock.

Why does the control unit MR587757 fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed. Crash data cannot be erased with standard diagnostic tools; Airbag24 erases it during the repair.

Other causes include ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery or a jump start.

Which of these causes applies to a particular unit only becomes clear from the test on the test bench. A guess alone is not enough for that.

How can you tell that the MR587757 is defective?

A defect shows up in the airbag warning light in the instrument cluster when it stays on permanently or lights up intermittently. An error message in the instrument cluster, a missing connection to the diagnostic tool or a fault memory that cannot be cleared also belong here. Then airbags and seatbelt pretensioners may fail to deploy in an emergency.

• Airbag warning light on permanently or intermittently
• Error message in the instrument cluster
• Diagnostic tool receives no connection to the control unit
• Fault memory cannot be cleared

The warning light is the first thing you notice, and it calls for a check in good time.

Which vehicles is the MR587757 fitted in?

The airbag control unit MR587757 is fitted in these vehicles: Mitsubishi Colt CZ (2004-2008) and CZ Facelift (2008-2012).

The stored vehicles for this part number at a glance:

• Mitsubishi Colt CZ (2004-2008)
• Mitsubishi Colt CZ Facelift (2008-2012)

Matching the part number on the label of the removed unit with this page only confirms its identity. Having the fault memory read out beforehand is what shows whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 285001684, 8201A143, 8635A223, 97RA-0104822, MR587416, MR587417.

How does the repair of the MR587757 work?

Processing at Airbag24 usually takes 3–4 working days. During this time the unit is tested, defective components are repaired, the crash data is erased and a function test is carried out.

Before that, have the fault memory read out and enclose the log. Then disconnect the battery and only afterwards remove the control unit. Create the repair order online and send the unit in well packed.

After the function test, the unit goes back to you. Our repairs come with 2 years' statutory liability for defects. The repaired control unit comes back with all vehicle data and is ready for use as soon as it is refitted — no coding or programming is required.

How does the control unit MR587757 get to Airbag24?

Either you send the unit as a parcel, or you book a UPS collection for an extra charge. After the repair, UPS brings it back to you.

Print the repair order and put it in the parcel; pack the unit shockproof.