Airbag control unit with part number 86250-08121

What does the airbag control unit 86250-08121 do?

The airbag control unit 86250-08121 is part of the restraint system (SRS) in SsangYong. It processes the measurements from the crash sensors, decides on firing the airbags and seatbelt pretensioners, and checks the system continuously. If an accident has happened, it stores crash data and locks itself.

The unit reports irregularities to the airbag warning light in the instrument cluster.

Why does the control unit 86250-08121 fail?

With the 86250-08121, stored crash data after an accident is the most frequent cause of failure, even if no airbag has deployed. A standard diagnostic tool cannot erase it; during the repair, Airbag24 erases it.

Further causes lie in aged electronic components, cold solder joints, or moisture and corrosion at the plug connections.

Voltage spikes, for example from a weak battery or a jump start, can also become a problem.

How can you tell that the 86250-08121 is defective?

The airbag warning light signals a defect in the 86250-08121 when it stays on continuously or intermittently. Then there is a possibility that the airbags and seatbelt pretensioners will not deploy in an emergency.

Further signs are:

• a message in the instrument cluster
• no connection to the diagnostic tool
• a fault memory that cannot be erased

Which vehicles is the 86250-08121 fitted in?

The control unit 86250-08121 is fitted in these vehicles: SsangYong Rexton Y250 (2006-2012), Y200 (2001-2006) and Y290 W (2012-2017).

The following list shows the vehicles assigned to this part number.

• SsangYong Rexton Y250 (2006-2012)
• SsangYong Rexton Y200 (2001-2006)
• SsangYong Rexton Y290 W (2012-2017)

Comparing the part number on the label with this page only clarifies whether it is the right unit. Have the fault memory read out beforehand, because only this log shows whether the control unit is defective or a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 86250-08120, 86250-08140.

How does the repair of the 86250-08121 work?

At Airbag24, processing of the 86250-08121 usually takes 3–4 working days. This time covers only checking, repairing and testing.

Your steps begin with the fault memory, whose log you attach. Then disconnect the battery and remove the control unit. Only then create the repair order online and send the unit in.

Airbag24 checks the unit on the test bench, repairs defective components, erases stored crash data and carries out a function test. 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 86250-08121 get to Airbag24?

The 86250-08121 reaches Airbag24 as a parcel, or you book a UPS collection for an extra charge. The unit is sent back by UPS after the repair.

Enclose the printed repair order and make sure the packaging is shock-proof.