Cx7 Car will not open with remote or reg key

Hi,
You have the actual key that inserts into the door lock? Are you certain it's the correct key and not a 'valet' key? Does the car have other key locks that it may work in such as the rear hatch or passenger's door? Attached is the Owner's Manual or call the dealer for more ideas.

GL,
Td https://www.mymazda.com/MusaWeb/pdf/manuals/2008_CX7_OM.pdf

whats this X reg thing please does it mean its a naughty version? just use the key and dont arm the alarm if its a seperate add on alarm then cut it right out as never seen a factory alarm on this car only the immobilisor .

yes it has a battery and if the signal is too weak it will not have enough power to send the signal to the car

unlock the car with the key/hold over for 30 secs.
lock the car with the key/hold over 30 secs.
then press/hold down unlock button on remote.
you have just reset your alarm/central locking system
change remote batteries every 2 years...... both remotes....

This website lists key and remote programming instructions for a range of vehicles and it's free.

www.carkeyhelp.co.uk

programming of remote :- ( you will need all your remotes for this )
insert a programmed key into the ignition.
turn key to position 2 & back four times within 6 second.
when you turn the ignition off after the fourth turn you should hear a beep to tell you your in programming mode for the next 10 seconds.
press any button on your new remote ( a tone will be heard when the car accepts the button press ) now do the same with your old remotes too.
either switch the ignition back on or wait until the timer runs out on the programming mode & your done

the buttons in the key are worn, you need a new key.

I have an A4 and did this to re-program my key:

1. used the key to start the car...then turned it off
2. put the key in the driver door (door closed)
3. pressed the lock button on the key fob once
4. turned the key to lock the door.

This is basically the steps in the owners manual, but the car must be started with the key first, and the key must be in the door lock before pressing the lock button.

Try spraying graphite lock lube into the door lock cylinders, this usally corrects this problem.

i have Nissan Primera s manual,03 reg. Battery went dead two days ago, today i tried to open the car with my remote key, it didn't respond as battery was totally dead. I tried to open the door manually with the key,it wont open. Can any one help me please.....?