Airbag control unit with part number 285552993R

What does the airbag control unit 285552993R do?

The airbag control unit 285552993R acts as the central unit that controls the restraint system (SRS) in Renault. It queries the crash sensors, assesses an impact within milliseconds and decides which airbags and seatbelt pretensioners are triggered. It indicates faults via the airbag warning light.

During operation, the unit checks the system continuously for faults and stores them. After an accident, it creates crash data and then locks itself.

The control unit combines measurement, decision and monitoring in a single unit.

Why does the control unit 285552993R fail?

The most common cause: crash data stored after an accident, even if no airbag has fired. Normal diagnostic tools cannot erase it. Further triggers are aged electronics, cold solder joints, moisture on plug connectors, corrosion and voltage spikes.

Stored crash data does not necessarily point to damage. Airbag24 removes it during the repair.

The other causes act over a longer period. Electronic components age, solder joints can be cold, and moisture attacks the contacts.

Voltage spikes arise, for example, from a weak battery or a jump-start and can stress components.

How can you tell that the 285552993R is defective?

A defect shows itself mainly through the airbag warning light in the instrument cluster, which stays on permanently or intermittently. Further signs are an error message, a lack of connection to the diagnostic tool, and a fault memory that cannot be cleared.

In that case, airbags and seatbelt pretensioners may fail to deploy in an emergency. This is the real danger.

The warning light is not a minor matter. Arrange an inspection promptly, even if the vehicle otherwise seems to run normally.

Which vehicles is the 285552993R fitted in?

The control unit 285552993R is fitted in these vehicles: Renault Arkana I (from 2019).

The list of stored models follows here:

• Renault Arkana I (from 2019)

You should compare the part number on the label of the removed unit with this page. This only establishes that you have the right unit. Whether the unit is defective or a plug or cable is the cause is shown only by the fault memory, so have it read out beforehand.

For the same vehicles, we also repair control units with the part numbers 285015832, 285A40674R, 285A49105R, 5D3EEF4828, 985103085R.

How does the repair of the 285552993R work?

The fault memory is read out first, and the log is attached to the unit. Then you disconnect the battery and only then remove the control unit. Online, you create the repair order, and you send the unit in well packed. At Airbag24, processing usually takes 3–4 working days.

On the test bench, Airbag24 examines the unit, replaces defective components, erases the stored crash data and tests the function. The repaired unit then goes back to you.

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 285552993R get to Airbag24?

You send the unit to Airbag24 as a parcel or, for an extra charge, UPS collects it. After the repair, it is returned to you by UPS.

The printed repair order goes into the parcel, and the packaging must be shockproof.