Airbag control unit with part number 285586256R

What does the airbag control unit 285586256R do?

The airbag control unit 285586256R is the central control of the restraint system (SRS) for Renault. It evaluates the crash sensors, decides in the event of an accident within milliseconds which airbags and seatbelt pretensioners are triggered, and monitors the system continuously.

If it detects a fault, it shows this via the airbag warning light in the instrument cluster.

In the event of an accident, it also reacts by storing crash data and locking itself.

Why does the control unit 285586256R fail?

The most common cause with 285586256R is crash data stored after an accident, even if no airbag has been triggered. In addition come aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

A normal diagnostic tool cannot remove the crash data. Airbag24 takes care of this during the repair.

Voltage spikes, for example from a weak battery or a jump start, can strain the electronics. Moisture in the plugs can also impair the contact.

How can you tell that the 285586256R is defective?

A defect on the 285586256R becomes visible through the airbag warning light in the instrument cluster, which lights up continuously or intermittently. In addition, a fault message appears, there is no connection to the diagnostic tool, and a fault memory cannot be deleted.

The most important signs at a glance:

• airbag warning light lights up continuously or intermittently
• fault message in the instrument cluster
• diagnostic tool cannot reach the control unit
• fault memory cannot be deleted

In an emergency, the airbags and seatbelt pretensioners may not trigger. Prompt checking is therefore advisable.

Which vehicles is the 285586256R fitted in?

The 285586256R is fitted in this vehicle from Renault: Renault Mégane III (2008-2016). The assignment applies only to this part number.

The vehicles assigned are these:

• Renault Mégane III (2008-2016)

A comparison of the part number on the label of the removed unit with this page only confirms that it is the correct unit. This comparison does not establish the cause. Therefore have the fault memory read out beforehand; the result shows whether the control unit is defective or whether a plug or cable is affected.

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

How does the repair of the 285586256R work?

First read out the fault memory of the 285586256R and enclose the log, then disconnect the battery and remove the unit. Next, create a repair order online and send the unit in well packed.

Airbag24 checks the unit on the test bench, replaces defective components, deletes stored crash data and carries out a function test. Processing usually takes 3–4 working days. Your own unit is then returned 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 285586256R get to Airbag24?

You send the 285586256R in as a parcel, or you book a UPS collection for an extra charge. The return after the repair is made by UPS.

Enclose the printed repair order with the parcel. Pack the unit shockproof.