Airbag control unit with part number 285551086R

What does the airbag control unit 285551086R do?

The airbag control unit 285551086R forms the control unit of the restraint system (SRS) for Renault. It processes the signals from the impact sensors and triggers the matching airbags and seatbelt pretensioners within milliseconds in a crash. Faults are reported via the airbag warning light.

During operation the unit checks the entire system continuously. After an accident it stores crash data and locks itself.

Sensors and triggering are connected through this unit. Its function is therefore essential for the protection of the occupants.

Why does the control unit 285551086R fail?

The most common cause is crash data from an accident in which no airbag fired; an ordinary diagnostic tool does not erase it. Further causes are ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery or a jump start.

Airbag24 deliberately removes the crash data during the repair, because common means do not reliably eliminate it.

The other causes act on the electronics over a long period and only become noticeable later.

How can you tell that the 285551086R is defective?

A fault is recognised by the airbag warning light, which lights up permanently or intermittently, by a fault message in the instrument cluster, by the diagnostic tool having no connection to the control unit, or by a fault memory that cannot be cleared. In a crash, airbags and seatbelt pretensioners may then possibly not fire.

These signs may occur singly or together:

• airbag warning light, permanent or intermittent
• fault message in the instrument cluster
• no connection between diagnostic tool and control unit
• fault memory that cannot be cleared

The warning light is the vehicle's direct indication. A prompt check clarifies whether the control unit is affected.

Which vehicles is the 285551086R fitted in?

The airbag control unit 285551086R is fitted in these vehicles: Renault Arkana I (from 2019).

The vehicles recorded for this unit follow in the list.

• Renault Arkana I (from 2019)

Compare the part number on the label of the removed unit with this page; that only confirms the correct unit. Read out the fault memory beforehand, since this result shows whether the control unit is defective or a cable or plug is the cause.

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

How does the repair of the 285551086R work?

First have the fault memory read out and enclose the log. Disconnect the battery, and only then remove the control unit. Create a repair order online and send in the well-packed unit. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench and replaces defective components. Then the crash data is erased and a functional test is carried out.

Your own unit goes back to you afterwards. 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 285551086R get to Airbag24?

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

Enclose the printed repair order in the parcel and pack the control unit shockproof.