My mazda key fob just stopped working so i changed my batt and now does not work at all what should i do

if you disconect positive on batt termanel for five ten min it should reset itself

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No key fob no start,flash signal on then security system on .... no starting...get a key fob for this bike or change the batt fob.

take fuse out & replace batt in key fob

Loss of programming maybe or a faulty keyless entry module.

I have taken a GM key FOB apart before and found a bad soldered connection. If that doesn't work, people sell them on Ebay all the time, look up how to program on the web and reprogram it to match your vehicle.

all you have to do to reset the coding is hold the lock button down for a minute or two till the locks click locked. then test it again by unlocking them. if the button light flashes rapidly then the batt is low, which will affect the distance for use. (do the re-code right next to the vehicle for best results.)

The battery in your remote key fob can be changed.But the spare key has to be programed to work.Take your main key to the dealers And have them do it for you.

get in your car close door hit the unlock button then put key in the ignition cycle the key from off to on (STOP BEFORE START POSITION) cycle key off to on 7 times after the 7th trime the doors should lock the unlock automatically that means u are in trainning mode hit the unlock button on key fob. the key fob should now work if it doesn't then try changing batt

2000 Mazda 626
Note: Make SURE the battery is new.
Instructions for programming ONE keyless remote fob.
1. Open the driver’s door & leave open.
2. Insert the key in the ignition.
3. Turn the key to the on and off position 3 times.
4. Remove the key from the ignition.
5. After door open chime stops, press the door open button 3 times.
6. After chime, press any fob key twice.
7. After second chime, press any fob key twice again.
8. After third chime, press any fob key twice again.
9. Press the door open button once.
10. The car should give another acknowledgement chime.
11. Test key fob.
This DOES work. I just programmed mine successfully today, three hours ago.