Airbag control unit with part number 285582355R

What does the airbag control unit 285582355R do?

The airbag control unit 285582355R is the central control unit of the SRS restraint system for Renault. It processes the signals from the crash sensors, decides in an accident in fractions of a second which airbags and seatbelt pretensioners are triggered, and monitors the entire system continuously. It reports faults via the airbag warning light; after an accident, it stores crash data and locks itself.

The unit continuously evaluates the sensors and recognises when components no longer work correctly. This recognition is a prerequisite for the system to respond reliably in an emergency.

It therefore counts among the safety-relevant parts of the vehicle, even though it may look inconspicuous from the outside.

Why does the control unit 285582355R fail?

With the 285582355R, the most common cause is that crash data have been stored, even if no airbag has triggered; a normal diagnostic tool cannot delete them. Airbag24 deletes the crash data during repair. Other causes include aged electronic components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes.

On their own, the crash data say nothing about a defect in the unit. The other causes at a glance:

• aged electronic components
• cold solder joints
• moisture and corrosion on plug connections
• voltage spikes, for example from a weak battery or a jump start

How can you tell that the 285582355R is defective?

A defect shows up as an airbag warning light in the instrument cluster that stays on permanently or intermittently, and as a fault message in the instrument cluster. In addition, the diagnostic tool fails to establish a connection with the control unit 285582355R, or the fault memory cannot be cleared. In these cases, airbags and seatbelt pretensioners may possibly not deploy in an emergency.

The warning light indicates a detected malfunction but does not name a specific component. If it lights up, have the vehicle checked promptly.

Only reading out the fault memory with a diagnostic tool shows which entries are stored. Until then, it remains unclear whether the unit itself or the wiring is affected.

Which vehicles is the 285582355R fitted in?

The airbag control unit 285582355R is fitted in these vehicles: Renault Mégane III (2008-2016). If your car is among them, the unit is in principle a possible match.

These vehicles are on record:

• Renault Mégane III (2008-2016)

Compare the part number on the label of the removed unit with this page; this only confirms that you have the correct unit. Also have the fault memory read out before taking any further steps, as 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 285581365R, 8200962388, 985105478R.

How does the repair of the 285582355R work?

First, have the fault memory read out and enclose the log. Then disconnect the battery, and only after that remove the control unit 285582355R. Next, create the repair order online before sending in the well-packed unit. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, replaces defective components, deletes stored crash data and runs a functional test.

Afterwards, your unit is 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 285582355R get to Airbag24?

You send your control unit 285582355R as a parcel; alternatively, you book a UPS collection for an extra charge. The return after the repair is handled by UPS.

You place the printed repair order in the parcel, and you pack the unit shock-resistant.