Airbag control unit with part number 285586285R

What does the airbag control unit 285586285R do?

The airbag control unit 285586285R acts as the control centre of the restraint system (SRS) in the vehicle. It analyses the signals from the crash sensors, decides within milliseconds in an accident whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously. After an accident it stores crash data and locks itself.

If it reports a fault, the airbag warning light appears in the instrument cluster.

Why does the control unit 285586285R fail?

On the 285586285R, the most common cause is crash data stored after an accident, even if no airbag has deployed. This data cannot be deleted with a normal diagnostic tool; Airbag24 deletes it during the repair. The other causes are ageing components, cold solder joints, moisture and corrosion on connectors, and voltage spikes.

An entry from an accident remains in the unit until it is cleared during the repair. Ageing components and cold solder joints become apparent over time, whilst moisture and corrosion on the contacts gradually disrupt the connection.

How can you tell that the 285586285R is defective?

A defect in the 285586285R shows up as the airbag warning light, which stays on permanently or intermittently. In addition, messages appear in the instrument cluster, and the diagnostic tool cannot reach the control unit. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

• The warning light in the instrument cluster stays on constantly or intermittently.
• An error message is shown on the instrument cluster display.
• There is no connection between the diagnostic tool and the control unit.
• The fault memory cannot be cleared.

If these signs appear, have the system checked promptly. A single warning is already reason enough for this.

The data from the fault memory helps to interpret the findings later on.

Which vehicles is the 285586285R fitted in?

The 285586285R is fitted in these vehicles: Renault Mégane III (2008-2016).

The list of vehicles follows here:

• Renault Mégane III (2008-2016)

Comparing the number on the label of the removed unit with this page only confirms that it is the correct unit. Whether there is a defect, or whether a connector or cable is causing the fault, can only be established by reading the fault memory. For that reason, have it read out before removal.

For the same vehicles, we also repair control units with the part numbers 285581365R, 8200962388, 985105478R.

How does the repair of the 285586285R work?

First have the fault memory of the 285586285R read out and enclose the log. Only then disconnect the battery and remove the control unit; then create the repair order online. At Airbag24, processing usually takes 3–4 working days.

You send in the well-packed unit. Once it has arrived, Airbag24 examines it on the test bench, repairs defective components, deletes stored crash data and carries out a functional test. Afterwards, your own unit is sent back.

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 285586285R get to Airbag24?

You send the control unit 285586285R as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it by UPS. The printed repair order goes into the parcel, and the unit must be packed so that it is shock-proof.

A sturdy box keeps the unit securely together on the way. The printed repair order in the parcel assigns the shipment unambiguously.