Airbag control unit with part number 285589985R

What does the airbag control unit 285589985R do?

In the vehicle, the airbag control unit 285589985R forms the central control unit of the SRS restraint system of Renault. It processes the signals from the crash sensors and decides within milliseconds in a collision which airbags and seatbelt pretensioners are triggered. After an accident it stores crash data and locks itself.

During operation the unit monitors all connected components. If it detects a fault, it switches on the airbag warning light and stores the error in the memory so that a workshop can read it out.

Why does the control unit 285589985R fail?

For the control unit 285589985R, the most common cause after an accident is stored crash data, even if no airbag has triggered. An ordinary diagnostic tool cannot erase it. In addition, aged components, cold solder joints, corrosion on plug connections and voltage spikes are among the causes.

Besides the crash data, these causes come into consideration:

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

Crash data arises regardless of whether an airbag has triggered. A unit from an accident vehicle is therefore checked for it first.

How can you tell that the 285589985R is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently on the control unit 285589985R, and an error message appears in the instrument cluster. The diagnostic tool finds no connection to the control unit 285589985R, or the fault memory cannot be cleared. In this case, airbags and seatbelt pretensioners may possibly not trigger in an emergency.

In everyday use, the warning light shows that something is wrong in the system. Anyone who overlooks it misses the notice of a fault that affects the entire restraint system.

Which vehicles is the 285589985R fitted in?

The part number is decisive, not the brand Renault alone. The control unit 285589985R is fitted in these vehicles: Renault Fluence I (2009-2018).

You can see the vehicles in detail in this overview.

• Renault Fluence I (2009-2018)

Compare the part number on the label of the removed unit with this page; this only shows that it is the right unit. Also have the fault memory read out beforehand, because only the 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 285581628R, 5WK44315.

How does the repair of the 285589985R work?

First have the fault memory of the control unit 285589985R read out and attach the log, then disconnect the battery and remove the unit. Then create a repair order online and send in the well-packed control unit. Processing at Airbag24 usually takes 3–4 working days.

At Airbag24 the unit is checked, defective components are repaired, crash data is erased and a function test is carried out. Afterwards you receive your own unit 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 285589985R get to Airbag24?

You send the control unit 285589985R as a parcel or book a UPS collection for an extra charge. The return after the repair is also made by UPS.

The printed repair order belongs in the parcel, and the unit needs shockproof packaging.