here is pictures and advice on how to replace it :)
http://www.renaultforums.co.uk/showthread.php?t=10062
How do you change the TDC sensor on the Renault Scenic RX4
The coolant temperature sensor in a Renault Megane Scenic is located on the right hand side of the engine as you are looking at it. It is located just above the TDC sensor.
where is the tdc sensor on a 2003 scenic 1.6
Tdc sensor is located lower front of gearbox on Renault laguna diesel engine 2001 onward.
renault magene coupe..2ltr sensor 8200156362
You have to remove the battery to take it out and see it better, one the battery is out you will see two small bolts that hold the sensor in pace over the crankshaft. Peter
at the back
i have been told my camshaft position sensor needs changing on my Renault scenic 2005 model a have brought one but don't know where it is to change it
yes youcan
To change the TDC (Top Dead Center) sensor on a 2005 Grand Scenic, first, disconnect the battery to ensure safety. Locate the TDC sensor, which is usually found near the crankshaft or flywheel. Remove the electrical connector and unscrew the sensor from its mounting point. Install the new sensor by reversing the process—secure it in place, reconnect the electrical connector, and reconnect the battery.
2000 suzuki vitara 2.0 crankshaft sensor
on my Renault scenic 1998 version it was at the front of the engine bay with a red cap but as for the 2003 version i dont have no idea hope this helps