A: Yes, on most Renaults (Clio, Megane, Scenic) the pump is accessible under the rear seat. You’ll need a special locking ring tool (€15 on Amazon). Disconnect the battery first — fuel vapors are flammable.
Turn the ignition to “ON” (do not start). You should hear a 2-second whirr from the rear seat. No sound = dead low-pressure fuel pump. renault pummp
Cold engine: Remove radiator cap. Start engine. If coolant immediately shoots out, combustion gases are leaking past the head gasket — not the pump. If no flow through the radiator neck after 2 minutes, water pump is failed. A: Yes, on most Renaults (Clio, Megane, Scenic)
: Owners have reported needing to manually pump the in-line fuel pump before starting if air enters the system, which can also cause low power below 2000 RPM. Renault 4CV Turn the ignition to “ON” (do not start)