Renault Df104 [patched] -

Disconnect the battery (wait 15 minutes for the system to discharge) and use an electrical contact cleaner on the plugs under the seat. This removes oxidation that causes high resistance.

The most common "fix" for Renault airbag codes involves the wiring under the front seats. Constant seat adjustments can pull or loosen the yellow connectors. Ensure these are seated firmly.

: Many technicians choose to cut out the plastic plugs under the seat and solder the wires directly. This creates a permanent connection that won't loosen during seat movement.

A damaged "clock spring" or rotary switch in the steering column. Blown fuses related to the safety restraint system (SRS). Moisture ingress affecting the airbag control module. Step-by-Step Diagnostic Process

Once the physical repair is complete, the DF104 code may not disappear automatically. You will likely need a diagnostic tool to clear the stored fault from the ECU memory. If the repair was successful, the dashboard warning lights should stay off upon the next ignition cycle.

Using a diagnostic tool like CAN Clip or an OBDII scanner, check the live data for "Passenger Airbag Circuit 1." Resistance should typically stay between 1.8 and 4.0 ohms. Potential Repair Solutions

If the code persists, the fault may lie in the rotary connector behind the steering wheel. Listen for clicking sounds when turning the wheel, as this indicates a snapped ribbon cable.