Car remotes can stop working for several reasons. First thing to check is the battery. These can almost always be easily DIY replaced by popping the back off and swapping the battery out. If that doesn’t work then car key repair may be an option.
Some vehicles (particularly BMW/Land Rover and the blue Transit remotes) can have a rechargeable battery soldered to the circuit board. These are not quickly replaced. Like all re-chargeable batteries they have a limited lifespan and will eventually stop charging. We can replace these batteries when the time comes. For the blue Transit remotes it may be better to replace the remote for a newer type where the battery can be swapped out in seconds.
If the remote won’t work on all the buttons it’s probable that one of them is damaged or the solder joint has cracked. The flat Renault key cards are particularly prone to damage because the fit nicely in the back pocket and they get sat on. Replacing faulty or missing buttons can normally be achieved by anybody who can use a soldering iron. Old perished rubber centre buttons can be upgraded with ceramic buttons.
Even if your remote is working – check that your key actually works in the door locks. Sometimes remotes go flat but customers still can’t open the car because the locks have been changed or are faulty. If you don’t have the correct key for the lock you could be locked out if the remote or vehicle battery go flat.
