In the vast majority of cases, the smell of fuel in the C3 does not come from the engine, but from a fault in the… Flange (cover) from the fuel pump, which is located directly under the rear seat.
- Focused Model: Citroën C3 (Generation 1 and 2).
- The Chronic Cause: The plastic fuel pump cover (flange) is subject to pressure and temperature variations, as well as the natural drying out of the plastic. Over time, defects appear. microcracks either in the outlet connectors or in the cap structure itself. When you fill the tank or the fuel shakes, the liquid or vapor escapes there and goes directly into the cabin.
- The Electrical Hazard: Just above this cover are the pump’s electrical connectors. A fuel leak coming into contact with connectors that could generate sparks is extremely dangerous.
Location of Protection (Fuses): If you detect a serious leak and need to shut down the system to tow the car, the fuel pump fuse is located in… BSM (under the hood):
- Correct Fuse: It’s usually the fuse. F10 or F15, with amperage of 15A. Removing it will cause the pump to stop sending pressure to the system.
Maintenance Tip: When taking it to the mechanic, ask them to lift the back seat and open the black inspection cover. If there are yellowish marks or puddles of fuel on the pump, the flange should be replaced immediately. It is also recommended to replace the… gasket (sealing ring) Made of rubber to ensure a watertight seal.
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