Airbag control unit with part number 7700437471

What does the airbag control unit 7700437471 do?

The airbag control unit 7700437471 is the central control unit of the restraint system (SRS) for Renault. It evaluates the signals from the crash sensors, decides in an accident within milliseconds which airbags and seatbelt pretensioners are to fire, and monitors the system continuously.

The unit reports faults via the airbag warning light. After an accident it stores crash data and locks itself.

The monitoring runs in the background, without you having to trigger anything. That is exactly why many drivers only notice the function when the light shows something.

Why does the control unit 7700437471 fail?

The most common cause is crash data stored in the unit after an accident, even if no airbag has deployed; a normal diagnostic tool cannot erase it. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

The crash data is therefore the first point a workshop checks. Airbag24 erases it during the repair, so the unit works without this entry afterwards.

Aged components and cold solder joints change over time and are not tied to a single incident. Moisture and corrosion attack the plugs, and voltage spikes, for example from a weak battery or a jump-start, stress the electronics.

How can you tell that the 7700437471 is defective?

The airbag warning light in the instrument cluster lights up permanently or at times, an error message appears in the instrument cluster, the diagnostic tool gets no connection to the control unit, and the fault memory cannot be cleared.

Do not explain these signs away yourself: while the fault persists, airbags and seatbelt pretensioners may not fire in an emergency.

Have the light checked promptly, even if it only lights up at times.

Which vehicles is the 7700437471 fitted in?

The airbag control unit 7700437471 is fitted in these vehicles: Renault Scénic I (1996-2003).

Below you will see the vehicles assigned to this part number.

• Renault Scénic I (1996-2003)

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

For the same vehicles, we also repair control units with the part numbers 600639500, 7700415232, 7700418434, 7700430060, 7700569000, 8200117651.

How does the repair of the 7700437471 work?

First read out the fault memory and enclose the log, then disconnect the battery and only then remove the control unit. Next, create a repair order online and send the unit in well packed. Airbag24 needs usually 3–4 working days for checking, repair and function test.

Airbag24 checks the unit on the test bench, repairs defective components, deletes stored crash data and carries out a function test. The unit then 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 7700437471 get to Airbag24?

You send the unit in as a parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 sends it back by UPS.

Put the printed repair order into the parcel and pack the unit shock-proof.