When l get in my car (Renault clio 1.2 16v 02 reg) l wait for the lights on my dash to go out before l start my car but sometimes it jst does not start, so l take the keys out of the ignition & press the button on the key twice so the car locks then unlocks & then l try to start the car again & it still does not work so l use the spare key & it starts. l have to keep changing keys everytime it doesnt start. Is it something to do with the immobuliser or the batteries in my keys??

l had the 1.4 & the same happened to me. l do not know how mechanically u r but the problem come from the timing unit which r on the bell housing .It bolted down with 2 bolts . This unit picks up a little dust & then u car will do as u described. Just look where the engine & gearbox come together u will see it unscrew the bolts unplug the wire in it wipe it against ur pants put it back & ur problem will be solved.No more then 5 minutes & u will be a happy Renault owner again