Renault Megane key will not open doors

Question edited for typos (magan) (stoped).

The fob needs to be reset. If this doesn't work, drop into a place that fits car alarms, or if you service at a dealership, they ought to do it for free.

Renault Megane Key Remote Control Programming Instructions

https://www.programyourkeys.com > Renault_Megane_...
MEGANE WITH EARLY REMOTE (LED SWITCHES OFF WHEN HOLDING BUTTON DEPRESSED) · 1. Igniton ON · 2. Press and hold the central locking button for 5 seconds · 3.

https://www.google.com/search?q=Renault+megane+reset+fob

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Need to have diagnostic done with Renault clip. To determine if the opening aerials are working

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.

hold the cetral locking lock all button down until the doors lock and unlock. The imobilser light goes solid red. At this point you have 10 to press the botton on your key 2 times . the doors will unlock and lock.

I only saw question now. I've been through the same with my Renault Megane Hatch 2004. 1 card key unlocked but could not start the car; spare key said card not recognised. Renault said I needed new key cards as they don't last forever & they will need to be replaced from time to time. Ordered new key. They said would take 3 weeks to arrive but came in 2. Then needed to be encoded. Was very expensive

sounds like the locking mechanism froze up. you'll need to remove the door panel and lubricate the lock

Sounds like a weak ignition component, change the spark plug wires and cap and rotor if not already done, there is also an outside chance the ignition module located inside the distributor could be failing.

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

I had the same problem with mine

your key fob is now out of sync with the ECU to sync them just follow this link (renault will charge up to £180 for new key and to sync it)

http://renaulthelp.110mb.com/ImmBypass.html

You'll need a new door latch.