Airbag control unit with part number 7700423313

What does the airbag control unit 7700423313 do?

The airbag control unit 7700423313 controls the restraint system (SRS) of Renault in the vehicle. It evaluates the signals from the crash sensors, decides in a collision within milliseconds on triggering, and monitors the system continuously. After an accident it stores crash data and locks itself.

Seatbelt pretensioners and airbags are activated via the control unit. If it detects a fault, it reports it via the airbag warning light in the instrument cluster.

Why does the control unit 7700423313 fail?

Stored crash data is the most common cause for 7700423313 after an accident, and this is so even when no airbag has triggered. A normal diagnostic tool cannot erase it. Other causes are aged electronic components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes.

The crash data remains in the unit after the accident, regardless of whether airbags have triggered. The other causes arise from ageing, moisture and electrical loads; they can only be narrowed down by measurement.

How can you tell that the 7700423313 is defective?

A defect in the control unit 7700423313 shows up as the airbag warning light lighting up permanently or intermittently. In addition, an error message in the instrument cluster or a disturbed diagnosis may be noticed. Airbags and seatbelt pretensioners may then possibly not trigger in an emergency.

These signs are especially revealing:

• Airbag warning light on, permanently or intermittently
• Error message in the instrument cluster
• Diagnostic tool without connection to the control unit
• Fault memory cannot be cleared

Which vehicles is the 7700423313 fitted in?

Which vehicles belong to this part number follows from the number itself and not from the brand Renault alone. The control unit 7700423313 is fitted in these vehicles: Renault Twingo I (1993-2007).

You can find the list of models here.

• Renault Twingo I (1993-2007)

Comparing the part number on the label with this page ensures that you have removed the right unit. Additionally have the fault memory read out, because only this shows whether the control unit is defective or whether a connector or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 550273300, 7700423313A, 7700839010C, 8200018833, 8200018835A, 8200018835B.

How does the repair of the 7700423313 work?

Start by having the fault memory of the control unit 7700423313 read out and attach the log. Then disconnect the battery, remove the unit and create a repair order online. Processing at Airbag24 usually takes 3–4 working days.

On the test bench at Airbag24 the unit is examined. Then defective components are repaired, the crash data is erased and a function test is run. Your own, repaired unit comes 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 7700423313 get to Airbag24?

You send a parcel with the control unit 7700423313 yourself, or you book a UPS collection for an extra charge. Airbag24 sends it back by UPS after the repair.

Enclose the printed repair order in the parcel. Pack the unit shockproof.