Mazda CX3 "Key" Replacement.

[Neeranam]

My car has a keyless start system, and for door opening.

For a few days the door hasn't been opening, and I've had to press the open on the key. Usually just press a button on the door.

 

Tonight the engine wouldn't start when pressing the start button. It started eventually when I held down the button on the key and pressed the button for a long time.

 

Could it be the key battery needs changing?

I'm not even sure if these keys have batteries,  I can't see it and nothing on the manual. Just found out that the key has a recall key in it, which is useful for opening the door but I don't think there's a manual ignition.

 

Do these keys have batteries that need changed? If so, does it have to be the mazda centre?

 

 

[Psimbo]

What does your user handbook say?

[mogandave]

Could be the battery, but how old is it? I've never had any issue with batteries 4-5 years old.

 

Were it me I would google the model and year and key issue...

 

 

[Neeranam]

Nothing in the handbook.

 

It's only  18 months old.

 

Got a new main battery 3 months ago.

[Neeranam]

I should have checked YouTube first, seems they do have a battery.

 

 

[mogandave]

Should be under warrenty, they may need to "re-program" it.

[Neeranam]

3 hours ago, mogandave said:

Should be under warrenty, they may need to "re-program" it.

I doubt it, the main battery wasn't.

[mogandave]

I doubt it, the main battery wasn't.

The main battery is considered a consumable, I doubt the remote is. I’ve never had to replace a battery in one.

I think it’s worth a try...

[transam]

Though it sounds like the key battery they usually last for many years. But I would change it to see if it solves the prob, if it doesn't I would go back to the dealer to let them sort it in case there is a bigger issue involved.

[mogandave]

Once you crack it open, the dealer will likely have nothing to do with it.

[Sam Lin]

Change the key battery yourself, follow the Youtube directions. Mine didn't last 2 years.

 

Also, Mazda has an inductive coil around the Engine Start button just for this dead battery situation - push the button using the key fob, it'll get enough power to signal and start.

Edited December 20, 2018 by Sam Lin