Airbag control unit with part number 7701067420

What does the airbag control unit 7701067420 do?

The airbag control unit 7701067420 controls the restraint system (SRS) of Renault. It reads the signals from the crash sensors, decides in a crash within milliseconds which airbags and seatbelt pretensioners to trigger, and monitors the entire system. If it detects a fault, it indicates this via the airbag warning light.

The crash sensors supply data continuously, and the control unit evaluates it all the time. In an emergency the decision must not be delayed, which is why the electronics work without a break.

After a crash, the unit stores crash data and locks itself.

Why does the control unit 7701067420 fail?

The most common cause is crash data stored after an accident, even if no airbag has been triggered. A normal diagnostic tool cannot erase this data. Other causes include aged components, cold solder joints, moisture and corrosion, and voltage spikes.

Over time components lose reliability, and solder joints can become cold. Moisture and corrosion at the plug connections disturb the contact.

Voltage spikes occur, for example, with a weak battery or a jump start, and can put a strain on the electronics.

How can you tell that the 7701067420 is defective?

A defect shows up as an airbag warning light in the instrument cluster that stays on permanently or intermittently. Fault messages, a missing connection to the diagnostic tool and a fault memory that cannot be cleared may also occur.

You may notice these signs:

• Airbag warning light staying on permanently or flickering
• Fault message in the instrument cluster
• Diagnostic tool receives no connection to the control unit
• Fault memory remains after an attempt to clear it

In this case, airbags and seatbelt pretensioners may not trigger in an emergency. Please have the system checked promptly.

Which vehicles is the 7701067420 fitted in?

The control unit 7701067420 is fitted in these vehicles: Renault Trafic II (2001-2014). This information is based on the part number and not on an inspection of your car.

The overview shows the model with this control unit:

• Renault Trafic II (2001-2014)

Comparing the part number on the label of the removed unit with this page ensures that it is the correct unit. It is also advisable to have the fault memory read out in advance. Only the result shows whether the control unit itself is defective or whether a connector or a cable is the cause.

For the same vehicles, we also repair control units with the part numbers 608361600E, 7701071459, 8200177654, 8200402592, 8200435339, 8200676895E.

How does the repair of the 7701067420 work?

First have the fault memory read out, then disconnect the battery and only then remove the control unit 7701067420. Then create a repair order online and send the unit in packed. Processing at Airbag24 normally takes 3–4 working days.

Airbag24 checks the unit on the test bench and repairs defective components. The team then erases the stored crash data and carries out a function test, after which your own unit is returned 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 7701067420 get to Airbag24?

You can send the control unit 7701067420 in as a parcel or have it collected by UPS for an extra charge. Airbag24 sends the unit back by UPS after the repair.

Enclose the printed repair order and pack the unit so that it is shock-proof.