Airbag control unit with part number 8200437477

What does the airbag control unit 8200437477 do?

In the vehicle of Renault, the airbag control unit 8200437477 evaluates the signals from the crash sensors. In an accident it decides within milliseconds which airbags and seatbelt pretensioners trigger, and it monitors the entire restraint system (SRS) continuously.

This monitoring runs uninterrupted in the background.

If the unit detects a fault, the airbag warning light lights up. After a crash, it stores crash data and locks itself.

Why does the control unit 8200437477 fail?

The most common cause is crash data stored after an accident, even without an airbag having triggered. A normal diagnostic tool cannot erase them. Other causes are aged components, solder joints, moisture and voltage spikes.

The further causes in detail are:

• aged electronic components
• cold solder joints
• moisture and corrosion at connectors
• voltage spikes, for example with a weak battery or jump-starting

The crash data are therefore the first point that an inspection clarifies.

How can you tell that the 8200437477 is defective?

A defect shows first on the airbag warning light in the instrument cluster, when it stays on constantly or intermittently. Fault messages and a missing connection to the diagnostic tool are added. In an emergency, airbags and seatbelt pretensioners may then not trigger.

The signs at a glance:

• Airbag warning light stays on constantly
• Airbag warning light lights up intermittently
• Fault messages in the instrument cluster
• Diagnostic tool does not find the control unit
• Fault memory cannot be cleared

If one of these signs occurs, have the fault memory read out promptly.

Which vehicles is the 8200437477 fitted in?

The control unit 8200437477 is fitted in these vehicles: Renault Mégane I (1995-2003). The information is based on our assignment to this part number.

These models are affected according to the assignment:

• Renault Mégane I (1995-2003)

Following the list there are two steps. First, compare the number on the label of the removed unit with this page; this only confirms that you have the right unit. Second, have the fault memory read out beforehand, because only the result shows whether the control unit itself is defective or a connector or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 600639500, 7700430059, 7700437477B, 8200117651, 8200117651A, 8200117652.

How does the repair of the 8200437477 work?

First have the fault memory read out and enclose the log, then disconnect the battery and only then remove the control unit. Then create a repair order online and pack the unit well before sending it. At Airbag24, inspection, repair and functional test usually take 3–4 working days.

On the test bench, Airbag24 checks the unit, replaces damaged components and erases stored crash data. A functional test follows 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 8200437477 get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends the control unit back to you via UPS.

Enclose the printed repair order with the parcel, and pack the unit shock-resistant.