Airbag control unit with part number 8635A091

What does the airbag control unit 8635A091 do?

The airbag control unit 8635A091 is the central control unit of the restraint system (SRS) in Mitsubishi. It reads the crash sensors, decides in a crash within milliseconds whether airbags and seatbelt pretensioners are triggered, and monitors the system permanently.

The unit shows faults via the airbag warning light in the instrument cluster. This keeps a malfunction in the restraint system visible to the driver.

After an accident, it stores crash data and then locks itself.

Why does the control unit 8635A091 fail?

The most common cause is crash data from an earlier accident that remains in the unit even if no airbag has deployed. A normal diagnostic tool does not erase it. Other causes include aged electronic components, cold solder joints, moisture, corrosion at plug connections, and voltage spikes.

Erasing the crash data is part of the repair at Airbag24.

Aged components and cold solder joints can cause faults that only appear after weeks. Moisture and corrosion disturb the connection at the plugs. Voltage spikes arise, for example, from a weak battery or a jump start.

How can you tell that the 8635A091 is defective?

The airbag warning light stays on permanently or intermittently, and an error message appears in the instrument cluster. The diagnostic tool gets no connection to the control unit, and the fault memory cannot be cleared.

Anyone who sees these signs has a defect that the system itself displays. Airbags and seatbelt pretensioners may then not deploy in an emergency. The signs should therefore be checked promptly.

Which vehicles is the 8635A091 fitted in?

The control unit 8635A091 is fitted in these Mitsubishi vehicles: Mitsubishi Pajero V90 (2007-2012) and V90 Facelift (2012-2021). The match with your own car is made via the part number on the unit.

The list shows vehicles in which this control unit occurs.

• 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. That confirms the correct unit. Have the fault memory read out before removal. Only the result shows whether the control unit is defective or whether a connector or a 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 8635A091 work?

The fault memory is read out first, and you attach the log. Then you disconnect the battery and only afterwards remove the control unit. Online you create the repair order, and you send in the well-packed unit. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench and repairs defective components. Airbag24 then erases the stored crash data and carries out a function test. Your own unit is then returned.

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 8635A091 get to Airbag24?

You send the unit as a parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 sends the unit back to you by UPS.

Put the printed repair order into the parcel and pack the control unit shock-resistant.