Airbag control unit with part number 8635A090L

What does the airbag control unit 8635A090L do?

The airbag control unit 8635A090L controls the restraint system (SRS) at Mitsubishi. It evaluates the crash sensors and decides within milliseconds in an accident which airbags and seatbelt pretensioners are triggered.

In addition, it monitors the system continuously and reports faults via the airbag warning light in the instrument cluster.

After an accident it writes crash data to memory and locks itself; the lock is lifted only by a repair.

Why does the control unit 8635A090L fail?

The main cause of the control unit 8635A090L is crash data stored after an accident, even if no airbag has deployed; a normal diagnostic tool cannot remove this data. Further causes are ageing electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes.

The crash data remains stored until Airbag24 erases it during the repair.

Voltage spikes occur, for example, with a weak battery or when jump-starting; this puts a strain on the electronics.

How can you tell that the 8635A090L is defective?

A defect on the 8635A090L shows itself in several signs that you can notice directly.

These signs are:

• The airbag warning light in the instrument cluster is lit permanently or intermittently.
• An error message appears in the instrument cluster.
• The diagnostic tool has no connection to the control unit.
• The fault memory cannot be cleared.

If you notice any such sign, the airbags and seatbelt pretensioners may not be able to trigger in an emergency.

Which vehicles is the 8635A090L fitted in?

The 8635A090L is fitted in these vehicles: Mitsubishi Pajero V90 (2007-2012) and V90 Facelift (2012-2021).

The list of vehicles on record follows:

• 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 to confirm the correct unit. Whether the control unit itself is defective or a plug or cable is at fault is shown only by a fault memory read out beforehand.

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 8635A090L work?

You have the fault memory read out and attach the log. Then you disconnect the battery, remove the control unit 8635A090L and create a repair order online. Then you pack the unit well and send it in. Airbag24 checks it, repairs defective components, erases the crash data and carries out a function test; the processing usually takes 3–4 working days.

Processing at Airbag24 usually takes 3–4 working days.

Make sure the fault memory has been read before the removal; this is the sequence for safety reasons.

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 8635A090L get to Airbag24?

You send the control unit 8635A090L as a parcel or book UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

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