My Megane Expression 1.6 2003 (03) does not lock the boot when i click the lock button on the card it locks the doors but not the boot Can someone help.

It is a known issue on that vehicle. Strip out the lock, clean it of moisture, lubricate moving parts and seal it up with silicone.

https://www.google.com/search?q=2012+Renault+Megane+boot+keeps+clicking+open

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Locking/Unlocking the doors from the outside
This is done using the RENAULT Card; see the "RENAULT Card" information in Section 1.
In certain cases, the RENAULT card may not work:
- if the RENAULT card battery is weak, flat, etc.
- if equipment operating on the same frequency as the card (mobile phones, etc.) is used;
- vehicle located in a high electromagnetic radiation zone.
It is then possible:
- to use the key integrated into the card to unlock the front left-hand door;
- to lock each of the doors manually;
- to use the interior door locking/unlocking control (refer to the following pages).
Using the key integrated in the RENAULT card
Insert key 1 into the lock in the driver's door and lock or unlock. Locking the doors manually
Turn screw 2 with the door open (using the end of the key) and close the door.
This means that the doors are then locked from the outside.
The doors may then only be opened from the inside or by using the key in the front left-hand door. Interior locking/unlocking door control
Switch 3 controls the doors, boot and, depending on the vehicle, the fuel filler flap simultaneously.
If a door or the tailgate is open or not closed properly, the doors and tailgate lock/unlock quickly.
If you need to transport objects with the boot open, the other opening elements can still be locked: with the engine stopped, press switch 3 for more than five seconds to lock the other opening elements.
Locking the doors without the RENAULT card
For example, in the event of a discharged battery or the RENAULT card temporarily not working, etc.
With the engine switched off and an opening element (door or boot) open, press and hold switch 3 for more than five seconds.
When the door is closed, all the doors and the tailgate will be locked.
Unlocking the vehicle from the outside is only possible with the RENAULT card in the vehicle's access zone or using the key integrated in the RENAULT card.
Door and tailgate status indicator
With the ignition on, the warning light integrated in switch 3 informs you of the locking status of the opening elements:
- indicator light on, the doors and tailgate are locked,
- indicator light off, the doors and tailgate are unlocked.
When you lock the doors, the indicator light remains lit and then goes out.

Use a screw driver and unlock the latch on the boot. Pull it out as you unlock it.

take off the door card inside for that door check for broken linkages. if ok check for broken wire in your door frame.

If the back seat folds down you can get in and take the cover off the boot lid and pull the levers to the lock and it will open. If the seats do not fold down you have to remove the back seats to get into the boot or just get a locksmith

Inter through the back seat. If the lock is broken you could unlock from the inside of the trunk.

hello, i am new to forum and new owner of a renault megane 2003 ( shake ur ***, they called it...) just in case you now have solution to this problem , it might help me too. What my own problem is: my megane automatic starts and drive fine, but when parked and card removed, dashboard stays on with steering not locked warning, and also my ABS warning is always on too. Are they linked? can someone help me with solutions weither diy or where to seek help wihtout taking a loan. Thank you

is yours the renault keycard to start and open doors?if it is a know these cards can go faulty.they were bad on renault laguna.the switch breaks off the board inside card.can be soldered back on.think you can get replacement switch kit on ebay with instructions how to fix.need someone who can solder with some eletronics knowhow.if not not sure sorry

shut front door then lock from inside via back door the lock back door and shut

the key has lost its code. open the doors manually and use the central locking button inside the car. hold it down and keep pressing your key fob. this should re code the key