Question about 2003 Mazda MX-5 Miata

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My miata battery drains all th time

My miata cannot sit for 1 day without losing battery power. I have replaced four batteries and still no end to the problem

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Try this can also use a test light instead of an ammeter to see which circuit is draining the battery:

Posted on Jun 16, 2009

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Recently experiencing battery drain and it appears to be sticking relay with electronic door locks. When the key is used to lock and unlock the car doors, there is not a problem. When the electronic phob is used to lock the doors, the relay sticks and draws about 5 Ma to draw down the battery overnight. Who would have thought.

Posted on Dec 05, 2012

  • Peter Dec 05, 2012

    Recently experiencing battery drain and it appears to be sticking relay with electronic door locks. When the key is used to lock and unlock the car doors, there is not a problem. When the electronic phob is used to lock the doors, the relay sticks and draws about 5 Ma to draw down the battery overnight. Who would have thought.



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Just remember to keep all of the doors closed when you do this and disconnect the hood light if there is one, thanks

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