Airbag control unit with part number 8200402396

What does the airbag control unit 8200402396 do?

The airbag control unit 8200402396 controls the restraint system (SRS) in Renault. It detects accidents by means of the crash sensors, selects the appropriate airbags and seatbelt pretensioners, and monitors the system continuously for as long as the ignition is switched on.

The unit writes detected faults to the fault memory and reports them via the airbag warning light. That way you learn early when something is wrong.

After an accident the unit stores crash data and locks itself. Diagnosis therefore starts with the fault memory.

Why does the control unit 8200402396 fail?

Crash data stored after an accident is the most common cause of failure, even if no airbag has deployed. A normal diagnostic tool does not make it disappear. Other likely causes include aged electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes.

Aged components and cold solder joints disrupt the electrical connection inside the unit. The connection also suffers when moisture or corrosion reaches the plug connectors.

Voltage spikes, for example from a weak battery or a jump start, place stress on the electronics from outside.

How can you tell that the 8200402396 is defective?

The airbag warning light in the instrument cluster indicates a defect when it stays on permanently or intermittently. In addition there are fault messages in the instrument cluster, a missing connection between the diagnostic tool and the control unit, and a fault memory that cannot be cleared.

Airbags and seatbelt pretensioners may then fail to deploy in a crash. Follow up on these signs promptly.

Which vehicles is the 8200402396 fitted in?

The 8200402396 is fitted in these vehicles: Renault Scénic I (1996-2003); Renault Mégane I (1995-2003).

The vehicles for which this part number is recorded are listed here:

• Renault Scénic I (1996-2003)
• Renault Mégane I (1995-2003)

Comparing the part number on the label of the removed unit with this page tells you that you have the right unit. Whether the control unit is defective or a plug or cable is the cause is shown only by the fault memory. Have it read out beforehand.

For the same vehicles, we also repair control units with the part numbers 600639500, 7700415232, 7700430059, 7700437477B, 8200117651, 8200117651A.

How does the repair of the 8200402396 work?

Have the fault memory read out first and attach the log to the unit. Then disconnect the battery and remove the control unit.

Next, create a repair order online and send in the well-packed unit. At Airbag24 it is examined on the test bench, defective components are replaced, stored crash data is removed and a function test is carried out.

Processing at Airbag24 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 8200402396 get to Airbag24?

Your control unit 8200402396 travels to Airbag24 as a parcel, either as your own shipment or with a UPS collection that you book for an extra charge. After repair Airbag24 sends the unit back to you by UPS.

Put the printed repair order into the parcel and pad the control unit so that it is packed shock-proof.