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Originally Posted by dave_mezza2006
You could have an air lock which would explain the gauge fluctuating. Or it could be a sticky thermostat that will need changing. Either way will mean a coolant change, so its probably best to change the thermostat while your at it !
As for the card not being recognised, have you got another card to try in the reader, as this will help to rule out the card reader.
If it does turn out to be the reader thats at fault, the good news is that they dont need programming to the car, so you can get one from a scrap yard / breakers etc and fit yourself in minutes.
Let hope its the reader as new keycards are loads of money new from Renault !
Thank you for the advice I'll try the other key.
I'll look into getting the thermostat changed to and may check the wiring going to the sensor.
Currently in lunalaguna's garage:
2001 renault laguna II 1.9dci estate