Airbag control unit with part number 285559924R

What does the airbag control unit 285559924R do?

The 285559924R takes over the evaluation of the restraint system (SRS) in the vehicle from Renault. It receives information from the crash sensors, and in an accident it decides within milliseconds whether the airbags and seatbelt pretensioners are triggered.

The control unit also monitors the system when no accident has occurred. It shows faults via the airbag warning light.

The housing also carries the manufacturer's number Bosch 0285020592. After an accident the unit stores crash data and locks itself.

Why does the control unit 285559924R fail?

The most common causes are crash data from an accident, which stays in memory even when no airbag has deployed and which an ordinary diagnostic tool cannot erase. Other causes are ageing electronic components, cold solder joints, moisture and corrosion at plugs, and voltage spikes, for example from a weak battery or a jump-start.

The crash data therefore remains in the unit, even if nothing can be seen at the airbags. Airbag24 erases it as part of the repair.

The other causes affect the electronics and the plug connections. A cold solder joint or a damp connection can cause a fault that is initially difficult to pin down.

How can you tell that the 285559924R is defective?

The airbag warning light lights up permanently or intermittently, a fault message appears in the instrument cluster, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared. In such a case, airbags and seatbelt pretensioners may not deploy in an emergency.

Typical signs are:

• The warning light in the instrument cluster stays on or keeps coming on
• Fault message in the instrument cluster
• The diagnostic tool cannot establish a connection
• The fault memory cannot be cleared

The light is a notice that the vehicle gives itself, and you should not ignore it.

In which vehicles is the 285559924R fitted?

The 285559924R is fitted in these vehicles: Renault Arkana I (from 2019).

The list shows the vehicles that are on file for this part number.

• Renault Arkana I (from 2019)

Compare the part number on the label of the removed unit with this page. This only ensures that you have the correct unit. Also have the fault memory read out beforehand, because only this result shows whether the control unit is defective or a plug or cable 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 285559924R work?

First have the fault memory read out and attach the log, then disconnect the battery and only afterwards remove the 285559924R. Create a repair order online and send in the well-packed unit. Airbag24 needs 3–4 working days for testing, repairing and checking.

The order of the steps serves safety and must be observed. Airbag24 checks the unit on the test bench, replaces defective components, erases crash data and carries out a function test. Afterwards your own, repaired unit 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 285559924R get to Airbag24?

For the 285559924R there is a choice: you send it in as a parcel, or you book a UPS collection for an extra charge. The return after the repair is made by UPS.

Pack the unit shockproof and include the printed repair order.