Airbag control unit with part number 86250-21021

What does the airbag control unit 86250-21021 do?

The airbag control unit 86250-21021 controls the restraint system (SRS) of SsangYong. It evaluates the signals from the crash sensors, decides within milliseconds in an accident whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously. It shows faults via the airbag warning light and, after an accident, stores crash data and locks itself.

Monitoring takes place continuously and not only in the event of an accident. This way the condition of the system is known at all times.

Because the restraint function depends on this unit, every indication of a fault matters.

Why does the control unit 86250-21021 fail?

The most common cause with the 86250-21021 is crash data stored after an accident, even if no airbag was triggered; a normal diagnostic tool cannot delete this data. Other causes include aged electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes.

Besides the crash data, these triggers are among the causes:

• aged electronic components
• cold solder joints
• moisture and corrosion at plug connectors
• voltage spikes, for example from a weak battery or jump-starting

Aged components gradually lose reliability, while moisture and corrosion disrupt contacts.

Crash data, on the other hand, is a trace of the accident stored in the unit, regardless of its condition.

How can you tell that the 86250-21021 is defective?

A defect in the 86250-21021 shows when the airbag warning light in the instrument cluster stays on permanently or intermittently, when a fault message appears in the instrument cluster, when the diagnostic tool cannot connect to the control unit, or when the fault memory cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to trigger.

The warning light in the instrument cluster is the signal that is noticed most quickly. If it does not go out after starting the vehicle, an inspection is advisable.

A missing connection to the diagnostic tool points to the wiring to the control unit or to the unit itself. Which of these is affected only becomes clear from the readout.

Which vehicles is the 86250-21021 fitted in?

The control unit 86250-21021 is fitted in these vehicles: SsangYong Stavic A100 (2004-2013); SsangYong Rodius A100 (2004-2013).

The overview lists these vehicles:

• SsangYong Stavic A100 (2004-2013)
• SsangYong Rodius A100 (2004-2013)

Have the fault memory read out beforehand, because only the result shows whether the control unit is defective or whether a connector or cable is the cause. Also check the part number on the label of the removed unit against this page; this confirms that it is the correct unit, nothing more.

For the same vehicles, we also repair control units with the part numbers 0 285 010 181, 5WK44281, 5WY64004, 8625021030, 8625021031.

How does the repair of the 86250-21021 work?

For the 86250-21021, first have the fault memory read out and attach the log, disconnect the battery and only then remove the control unit. After that, create a repair order online and send the unit in well packed. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, repairs defective components and carries out a function test; Airbag24 also deletes the stored crash data.

Afterwards your own unit is returned 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 86250-21021 get to Airbag24?

You send the control unit 86250-21021 as a parcel or, for an extra charge, book a UPS collection. After the repair, Airbag24 returns it to you by UPS.

The printed repair order goes into the parcel, and the unit is packed shock-proof.