Airbag control unit with part number 8635A186L

What does the airbag control unit 8635A186L do?

The airbag control unit 8635A186L coordinates the airbags and seatbelt pretensioners in the restraint system (SRS) of Mitsubishi. It evaluates the signals from the crash sensors, decides on triggering within milliseconds in an accident, and shows faults via the airbag warning light.

The sensors continuously supply the unit with measured values on acceleration and the position of the vehicle. From these, the control unit determines whether an accident has occurred.

After an accident, the unit stores crash data and locks itself.

Why does the control unit 8635A186L fail?

Stored crash data after an accident is the most common cause, even if no airbag was triggered; a normal diagnostic tool cannot remove it. Other causes are ageing electronics, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes.

The crash data remains stored in the unit. A simple attempt to erase it with the diagnostic tool does not lead to the goal.

The other causes are the ageing of components, cold solder joints and moisture at the plugs.

Voltage spikes, for example with a weak battery or when connected to a jump start, can also cause damage.

How can you tell that the 8635A186L is defective?

Typically, the airbag warning light in the instrument cluster lights up permanently or intermittently. In addition, a fault message appears in the instrument cluster, the diagnostic tool does not find the control unit, and the fault memory remains.

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

In an emergency, airbags and seatbelt pretensioners may then fail to trigger. The warning light reports the defect, so act on it directly.

Which vehicles is the 8635A186L fitted in?

The airbag control unit 8635A186L is fitted in these vehicles: Mitsubishi Pajero V90 (2007-2012) and V90 Facelift (2012-2021). Whether it fits your own vehicle is clarified by comparing it with the assignment.

The full assignment is shown in the overview.

• Mitsubishi Pajero V90 (2007-2012)
• Mitsubishi Pajero V90 Facelift (2012-2021)

Compare the part number on the label of the removed unit with this page; this only clarifies the identity of the unit. Also have the fault memory read out, because the log shows whether the control unit itself is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 153000313, 3SR791, 5757A026, 7407A095, 7420A082, 8635A457.

How does the repair of the 8635A186L work?

First, have the fault memory read out and attach the log. Then disconnect the battery, remove the control unit 8635A186L and create a repair order online. Testing, repairing and the function test at Airbag24 require 3–4 working days as a rule.

This order is fixed for safety reasons: first secure the log, then disconnect the battery, and only then remove the unit.

The packed unit goes to Airbag24. There it is examined on the test bench, defective components are repaired, the stored crash data is deleted and a function test is carried out. 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 8635A186L get to Airbag24?

The unit can be sent as a parcel, or UPS collects it for an extra charge. Airbag24 then sends the repaired unit back to you by UPS.

Please pack the unit shockproof and include the printed repair order.