Yes, you absolutely have to have the BCM dealer programmed. It controls many many aspects of the car, like the keys, tpms, interior lighting, etc. which varies based on options. Also, the BCM and PCM, and possibly the Instrument cluster must all be programmed to work together. if installing a new BCM, it must be programmed with as-built data Ford Mondeo Forum / Ford Fusion Forum. Ford Mondeo Mk4 (2007 - 2013) Security / Safety (Mk4 Mondeo) Firstly enter the car remotely with the working remote key Put the working key in the ignition, turn the key to position 2 and off 4 times quickly (let go on 4th off position) Ford Mondeo Forum / Ford Fusion Forum. Ford Mondeo Mk4 (2007 - 2013) Electrical (Mk4 Mondeo) Remote Control Programming They both work as a normal key, and open and start the car, but the buttons for remote locking and unlocking won't work on one of them. I thought it might be the battery, but when I opened it up, I found the battery was in 17 posts · Joined 2014. #1 · Jun 18, 2014. Hi, I have a mondeo mk4 titanium x with keyless entry and start. I have come to the boot today to open it but it will not open whilst the car is locked. Usually the boot will release leaving the rest of the car still locked. I have thought it may be an issue reading the key from the back but i can My focus keys are very sensitive to the batteries, I got some Maxell batteries and was getting through them at the rate of one per 2 weeks. Key not detected, key not unlocking car sometimes, remote battery low. I put an enegizer in about 2-3 months ago and no issues whatsoever since. Wait one minute before trying the remotes. 1. Close all the doors. 2. Turn Ignition key from position 0 to II eight times within 10 seconds. 3. Make sure the vehicle locks and unlocks the doors. 4. Press the remote transmitter button within 20 seconds., and make sure the vehicle locks and unlocks all the doors. Ford Focus (1998 - 2004) - 1999 1.6 - Remote key problems. I have lost the programming for my remote key when I changed the battery. I have tried the suggested method of reprogramming by turning the ignition from position 0 to II four times and hear the first bong. However when I press the buttons on the key I dont hear the second bong confirming the reprogramming and the fob still does not work. The new key works fine, opens in the lock, activates both the double lock and alarm when used in the lock, and starts the car perfectly but when I got home I found that the remote locking isn't working as expected. Pressing the lock button once locks the car but a second press does nothing. No audible locking sound and the indicators don't Hi Ford Mondeo Mk 4, 57 plate..I had two sets of keys, one of which now will not remote unlock or lock..the key part works fine and the duff fob still allows the car to start (key less start). Th … read more Here's how: Put the key in the ignition and turn it to on. Press the Unlock button three times. Turn the ignition off. Press the Unlock button three more times. Turn the ignition back to on. The horn should beep once. This tells you that you're now in programming mode. Press the Unlock button, then press Lock again. 57cnQSZ.