Airbag control unit with part number 86250-38540

What does the airbag control unit 86250-38540 do?

At SsangYong the airbag control unit 86250-38540 coordinates the restraint system (SRS). It measures the signals from the crash sensors, determines in an emergency which airbags and seatbelt pretensioners are triggered, and checks the system continuously. After an accident it stores crash data and locks itself.

This check happens out of sight. If the unit detects a fault, it lights the airbag warning light in the instrument cluster.

Anyone who reads the part number 86250-38540 on the unit is holding the central unit of the system, on which warning and triggering depend.

Why does the control unit 86250-38540 fail?

The most frequent cause is crash data that remains stored after an accident, even without a triggered airbag; a normal diagnostic tool cannot remove it. Also to be considered are aged components, cold solder joints, moisture and corrosion on plug connectors, and voltage spikes. Airbag24 erases the crash data during the repair.

Crash data is retained because the unit documents the process as an accident. Whether an airbag fired has no influence on this.

A second part of the causes lies in the components. Aged electronics and cold solder joints on the circuit board lead to faults over time.

Finally, moisture and corrosion on plug connectors, as well as voltage spikes from the vehicle electrical system, for example after a jump start, can affect the unit.

How can you tell that the 86250-38540 is defective?

A defect shows itself through the warning light in the instrument cluster, which stays on permanently or intermittently, through error messages, or through a diagnostic tool that cannot establish a connection. The fault memory remains as it is. In an emergency there is a risk that airbags and seatbelt pretensioners do not trigger.

The signs in detail:

• Airbag warning light in the instrument cluster, permanently or intermittently
• Error message in the instrument cluster
• Diagnostic tool cannot reach the control unit
• Fault memory cannot be cleared

Each of these displays is a reason to have the vehicle checked promptly.

Which vehicles is the 86250-38540 fitted in?

The part number 86250-38540 is found in these vehicles: SsangYong Musso Q200 (2018-2022) and Q200 Facelift (from 2022). Reliable confirmation comes from comparing the label on the unit.

Below we list the vehicles known to us for this part number.

• SsangYong Musso Q200 (2018-2022)
• SsangYong Musso Q200 Facelift (from 2022)

Two preliminary steps are worthwhile before removal. Comparing the label number with this page only gives certainty about the unit. Reading the fault memory, by contrast, tells you whether the control unit is defective or whether a plug or cable is the cause.

How does the repair of the 86250-38540 work?

It begins with reading the fault memory, whose readout is attached to the log. Then the battery is disconnected and the unit removed. You create the repair order online, and the well-packed unit is sent in. At Airbag24, checking, repair, erasing the crash data and function testing follow.

The order on the vehicle is fixed so that the work runs safely.

Airbag24 checks the unit on the test bench, repairs defective components, erases stored crash data and carries out a function test. Then your own unit goes back to you.

For the work at Airbag24 you should expect 3–4 working days as a rule. This covers only checking, repairing and testing.

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 86250-38540 get to Airbag24?

Shipment takes place either by a parcel that you hand in yourself or by a UPS collection booked for an extra charge. After the repair UPS brings the unit back to you.

The printed repair order goes into the parcel, and the unit is packed shockproof.