Airbag control unit with part number 8635A499

What does the airbag control unit 8635A499 do?

The airbag control unit 8635A499 coordinates the restraint system (SRS) of Mitsubishi. In a crash, it evaluates the sensor data and decides within milliseconds whether airbags and seatbelt pretensioners are triggered.

At the same time, it monitors the entire system. If it detects a fault, it shows this via the airbag warning light in the instrument cluster.

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

Why does the control unit 8635A499 fail?

The most common cause of a 8635A499 failure is crash data stored after an accident, even if no airbag was deployed. A usual diagnostic tool cannot remove it. Aged electronics, cold solder joints, moisture, corrosion at plug connections and voltage spikes are also possible.

Electronics age, and over the years components lose reliability. Moisture and corrosion mainly attack plug connections, and a cold solder joint interrupts signal paths.

Voltage spikes belong to the causes as well; a weak battery or a jump start can produce such spikes.

How can you tell that the 8635A499 is defective?

On the 8635A499, you can recognise a defect by the airbag warning light in the instrument cluster staying on permanently or intermittently. In addition, fault messages appear in the instrument cluster, there is no connection to the diagnostic tool, and the fault memory cannot be cleared.

These signs mean that airbags and seatbelt pretensioners may fail to deploy in an emergency. Anyone who notices them should have the system checked promptly.

Which vehicles is the 8635A499 fitted in?

The vehicle list shows whether your car is affected. The control unit 8635A499 is fitted in these vehicles: Mitsubishi Space Star A00 1st Facelift (2016-2019), A00 (2012-2016) and A00 2nd Facelift (from 2019).

In detail, the following vehicles are included:

• Mitsubishi Space Star A00 1st Facelift (2016-2019)
• Mitsubishi Space Star A00 (2012-2016)
• Mitsubishi Space Star A00 2nd Facelift (from 2019)

Compare the part number on the removed unit with this page to make sure you have the right unit. Have the fault memory read out beforehand, because only this finding 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 8635A234, 8635A374, 8635A377, 8635A393, 8635A396, 8635A409.

How does the repair of the 8635A499 work?

Before removal, have the fault memory of the 8635A499 read out and enclose the log, then disconnect the battery. Only then remove the control unit and create a repair order online. Next, send the unit in, well packed.

Airbag24 checks the unit on the test bench, repairs defective components and erases stored crash data. A function test follows before your own unit is returned to you.

At Airbag24, processing usually takes 3–4 working days. 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 8635A499 get to Airbag24?

You send the control unit 8635A499 as a parcel or book a UPS collection for an extra charge. The return after the repair is made by UPS.

Put the printed repair order in the parcel and make sure the packaging is shockproof.