The key fob wont open/lock the car, tried a new key but still no luck, must be a problem with the car rather than the fob.

Try the auto manufacturers 30 minute security reset.

Search "chrysler security reset" for instructions.

you didnt specify vehicle --you can try reprogramming key fob this only locks and unlocks doors if fob has auto start need to have dealer do programming
Free Keyless Remote Fob Entry programming instructions procedures for all...

what door.? (all )
its l then locked, so does it unlock form the inside and open
or only fails from out side with key or fob.
the key fails ,say with what,?
or with fob.
only that door fails both ways? key/fob.
what?
if only a fob fails?, use the spare one that came with car new.
does it fail?
do both FOBs fail?

To fix the tumblers, find a trusted locksmith. That's the way I'd go. Honda does have a kit, but, it's not a consumer one. You'd spend a decent amount of money on a kit that would fix hundreds of cars, so, that's why they won't sell it to you.

As for the key fob, have you tried putting a new battery in it? Your description is not very clear. The LX should have come from the factory with a key fob. So, if you got one, make sure it's the correct one with a good battery. To program it, put your key in the igntion, turn the key to position 2 (the position right before you start the car), press a button on the key fob, turn the key back to position 0, Repeat these steps over and over (about 4 to 5 times) until the doors lock/unlock. If that doesn't work, you could have a bum transmitter.

If some doors are not lock/unlocking, chances are bad doorlock acuators.

The RCDLR (remote control door lock receiver) could have failed, or the battery in your key fob is dead. The only way to get the immobilizer off is to use the key fob.

i would say the theft module saw the door trying to be open without the door lock or fob first, once the door lock button was pushed it shut down, it new doors were trying to be unlocked in a theft manner, once shut down it needs time to reset or needs to see ignition cycle with key and read chip in key, smart system isnt it, good luck.

I'm more familiar with Range Rovers and Saab's when it comes to key fobs but if you changed the battery you have to re-program the key fob. If you do not have an owner's manual that can take you through the steps you might want to try: push and hold the lock button on the key fob, put it in the driver's side door and turn to lock. With the button still depressed turn back to open, remove the key and release the button. If this doesn't work check any and all fuses associated with your system and last but not least you could take it to a dealer. Good luck!

you need to reprogram keys with the module. there could be a problem with the module though , you need to check it out

Why not take mit back to the place that repaired it and ask them to fix it properly?
Ken S.

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