Airbag control unit with part number 8201043700

What does the airbag control unit 8201043700 do?

8201043700 controls the restraint system (SRS) of Renault. It evaluates the crash sensors and in an accident decides within milliseconds which airbags and seatbelt pretensioners fire; it indicates faults via the airbag warning light.

The unit monitors the entire system in the background. After an accident it stores crash data and locks itself, and only the repair lifts this lock.

Why does the control unit 8201043700 fail?

Crash data from an accident is most often the cause, even if no airbag has fired, and it cannot be removed with an ordinary diagnostic tool. Aged electronics, cold solder joints, moisture or corrosion at plugs and voltage spikes can also trigger the failure.

Voltage spikes arise for instance from a weak battery or from jump-starting. They put a strain on components that are already weakened.

Moisture and corrosion attack mainly the plug connections, while cold solder joints inside can cause contact problems. Airbag24 erases the crash data during the repair; the check clarifies the other causes.

How can you tell that the 8201043700 is defective?

A defective control unit announces itself through the airbag warning light in the instrument cluster, which lights up constantly or only at times. In addition there is a fault message in the instrument cluster, no connection between the diagnostic tool and the control unit, and a fault memory that cannot be cleared.

Then airbags and seatbelt pretensioners may fail to deploy in an emergency. The light is therefore a direct indication of a fault in the system, and a prompt check is advisable.

Which vehicles is the 8201043700 fitted in?

The 8201043700 is fitted in these vehicles: Renault Clio III (2005-2014); Renault Modus I (2004-2012). Anyone wanting to know whether their car is among them compares it with the list on this page.

The data in our stock reads as follows:

• Renault Clio III (2005-2014)
• Renault Modus I (2004-2012)

Comparing the part number with the label of the removed unit only confirms that it is the correct unit. Have the fault memory read out in advance: only this result shows whether the control unit is defective or a plug or cable is to blame.

For the same vehicles, we also repair control units with the part numbers 285001509, 285001510, 285001511, 8200463297, 8200502126, 8200505179.

How does the repair of the 8201043700 work?

The fault memory is read out first, and the log goes into the parcel with the unit. Then you disconnect the battery and only then remove the control unit. You create the repair order online and send the unit in well packed.

On the test bench Airbag24 examines the unit, repairs defective components, erases stored crash data and carries out a function test. Afterwards the unit, which belongs to you, comes back to you.

For these steps Airbag24 usually plans 3–4 working days. 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 8201043700 get to Airbag24?

You send the control unit as a parcel or book a UPS collection for an extra charge. Airbag24 returns it by UPS after the repair.

The printed repair order is enclosed in the parcel, and the control unit is packed shock-proof.