How do you open a key fob to change the battery? (video)
https://www.youtube.com/watch?v=1VYVkMuoRv8
Why is my key fob beeping?
The repeating beeps means the car cannot detect the keyfob so the key isn't in the car or in close range. via
How do I program my Acura MDX key?
Turn the key in the ignition to the Off position, then back to the On position within four seconds once you've pressed the keyless remote button. You'll then need to press the Lock or Unlock button on your keyless remote once again, then repeat the process a third and final time to complete the programming. via