Airbag control unit with part number 285589428R

What does the airbag control unit 285589428R do?

The airbag control unit 285589428R is the central control unit of the restraint system (SRS) for Renault. It evaluates the signals from the crash sensors and decides within milliseconds in the event of an accident which airbags and seatbelt pretensioners are triggered. It reports faults in the system via the airbag warning light.

The unit monitors the restraint system continuously. After an accident, it stores crash data and locks itself.

The airbag warning light in the instrument cluster informs you as soon as the system has detected a fault.

Why does the control unit 285589428R fail?

Stored crash data is the most common cause, even if no airbag has deployed; a standard diagnostic tool cannot delete it. Other causes include aged electronic components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes, for example from a weak battery or a jump start.

Airbag24 deletes the crash data during the repair of the control unit 285589428R.

Electronic components age over time, and cold solder joints can interrupt the contact. Moisture and corrosion attack plug connections. Voltage spikes occur, for example, when starting with an external power source or with a weak battery.

How can you tell that the 285589428R is defective?

A fault on the control unit 285589428R shows up in the airbag warning light in the instrument cluster, which stays on constantly or only intermittently. In addition, a fault message in the instrument cluster and a fault memory that cannot be cleared may occur.

These signs at a glance:

• Airbag warning light in the instrument cluster stays on constantly or only intermittently
• Fault message in the instrument cluster
• Diagnostic tool gets no connection to the control unit
• Fault memory cannot be cleared

If these signs appear, the airbags and seatbelt pretensioners may not deploy in an emergency. In this case, have the system checked promptly.

Which vehicles is the 285589428R fitted in?

The control unit 285589428R is fitted in these vehicles: Renault Mégane III (2008-2016). To see whether your car is included, compare it with the vehicles listed.

The vehicles in detail:

• Renault Mégane III (2008-2016)

These steps will help you. Compare the part number on the label of the removed unit with this page; this only confirms that it is the right unit. Have the fault memory read out beforehand, because only that shows whether the control unit is faulty or 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 285589428R work?

For the control unit 285589428R, first read out the fault memory and enclose the log. Then disconnect the battery, and only then remove the control unit and create a repair order online. Airbag24 checks the unit on the test bench, replaces defective components, deletes stored crash data and carries out a function test.

The sequence is mandatory for safety reasons. Pack the unit well before sending it in.

Processing at Airbag24 usually takes 3–4 working days and includes checking, repairing and testing. Your own unit is then sent 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 285589428R get to Airbag24?

You send the control unit 285589428R 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.