Airbag control unit with part number 285582305R

What does the airbag control unit 285582305R do?

The airbag control unit 285582305R is the central control unit of the restraint system (SRS) for Renault. It evaluates the signals from the crash sensors, decides in an accident in a flash on the triggering of airbags and seatbelt pretensioners, and monitors the system continuously. It shows faults via the airbag warning light.

Monitoring runs in the background, and faults are recorded in the fault memory. The monitoring covers the entire restraint system, not just individual parts of it.

After an accident, the unit stores crash data and locks itself. The lock is only lifted by the repair.

Why does the control unit 285582305R fail?

Stored crash data is the most common cause on the 285582305R, even if no airbag has deployed. A normal diagnostic tool cannot erase it, but Airbag24 deletes it during the repair. Other causes are aged components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes.

Besides the crash data, the following other causes are possible:

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

Only the examination shows which of these causes is actually present.

How can you tell that the 285582305R is defective?

The airbag warning light in the instrument cluster lights up on the 285582305R, either permanently or intermittently. A fault message also appears in the instrument cluster, and the diagnostic tool gets no connection to the control unit; the fault memory cannot be cleared.

In an emergency, the airbags and seatbelt pretensioners may then fail to deploy.

A lit warning light is therefore a reason to have the system checked. The warning light is one of the indicators you should keep an eye on in the instrument cluster.

Which vehicles is the 285582305R fitted in?

The control unit 285582305R is fitted in these vehicles: Renault Mégane III (2008-2016). The list gives the models in detail.

These vehicles are listed below:

• Renault Mégane III (2008-2016)

Compare the part number on the label of the removed unit with this page. This only makes sure that you have the right unit in front of you. Also have the fault memory read out before removal, because only this result shows whether the control unit is defective or whether a connector 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 285582305R work?

First have the fault memory read out and enclose the log, then disconnect the battery and remove the control unit. Then create a repair order online and send the unit in, well packed. Airbag24 checks the 285582305R on the test bench, replaces defective components, deletes the stored crash data and carries out a function test; processing at Airbag24 usually takes 3–4 working days.

The order of these steps serves safety on the vehicle, so please follow it exactly. It applies to every removal.

Airbag24 deletes the crash data during the repair; no separate step is needed for this.

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 285582305R get to Airbag24?

You send the control unit 285582305R in as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it by UPS.

Put the printed repair order into the parcel and pack the unit shockproof.