Airbag control unit with part number 8201734039

What does the airbag control unit 8201734039 do?

For Renault, the airbag control unit 8201734039 coordinates the SRS restraint system. It receives the messages from the crash sensors, selects the airbags and seatbelt pretensioners to be triggered in a collision, and monitors all components continuously. Faults appear via the airbag warning light.

The sensor data is evaluated during operation, not only in an emergency. This keeps the unit permanently ready to check the system.

A collision leaves traces in the memory: the unit stores crash data and then locks itself. Only the repair lifts the lock.

Why does the control unit 8201734039 fail?

The most common cause on the 8201734039 is stored crash data after an accident, even if no airbag has triggered. A standard diagnostic tool does not erase it. Further causes include aged components, cold solder joints, moisture and corrosion, and voltage spikes.

In everyday use the other causes act over a long period. Electronic components age, solder joints can give way, and moisture attacks the contacts so that corrosion forms.

Voltage spikes result from a weak battery or from jump-starting. Such loads act directly on the electronics.

How can you tell that the 8201734039 is defective?

A defect on the 8201734039 shows above all in the airbag warning light in the instrument cluster, in an error message and in diagnoses that fail. In an emergency, airbags and seatbelt pretensioners may then possibly fail to deploy.

Watch for the following signs:

• The airbag warning light is on permanently or intermittently.
• An error message appears in the instrument cluster.
• The diagnostic tool does not connect to the control unit.
• The fault memory cannot be cleared.

The system thus detects for itself when something is wrong and shows it. If there is an indication, have the fault memory read out.

Which vehicles is the 8201734039 fitted in?

The part number 8201734039 is decisive for the assignment. The airbag control unit 8201734039 is fitted in these vehicles: Renault Kangoo II (2008-2021).

The following models carry this control unit:

• Renault Kangoo II (2008-2021)

Two steps help before removal. Compare the part number on the label with this page; that confirms the right unit. Also have the fault memory read out. Only the result shows whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 2840211503, 8200 656 329, 8200656331, 8201 229 153 A, 8201 475 929, 8201025624.

How does the repair of the 8201734039 work?

First the fault memory of the 8201734039 is read out, and the log belongs to the unit. Then you disconnect the battery and remove the control unit. For checking, repairing and testing at Airbag24, allow 3–4 working days as a rule.

Online you create the repair order, then you pack the unit well and send it in. At Airbag24 it is checked, components are replaced if necessary, and a function test completes the work. Crash data is erased before your own unit goes 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 8201734039 get to Airbag24?

You choose the route: either you send the control unit 8201734039 as a parcel, or you book a UPS collection for an extra charge. The return after the repair is made via UPS.

The printed repair order goes into the parcel, and the unit is packed shock-proof.