See how to replace the battery in your 2004 - 2006 #Mazda #3 #key #fob keyless entry remote.FCCID: KPU41846 - Order Here: First the key fob didn't work so put a new battery in. Still didn't work - but the car would start when I put the fob up to the start/stop button. The very ver … All cars, including your 2017 Mazda 3, need a working car battery to function properly. The car battery stores and funnels electricity to vital electrical components, including the ignition system that starts the internal combustion sequence. If it's time for a new battery for your 2017 Mazda 3, you can rely on AutoZone to have the right A thought for some of us: consider buying a battery load tester. They are not expensive and show you the true health of your battery. For example this week I managed to catch the battery in the wife's car before she got stranded. 0C weather and a 550A battery is putting out less than 200A. Step One: Remove the back cover of the dead key fob by carefully prying between the black back and chrome side piece. A plastic pry tool is recommended to help prevent marring the plastic. Step Two: Remove the battery cover but remember the orientation. Step Three: Remove and properly discard the bad battery. Step Four: Put the new CR2025 cell OEM 4-Button Smart Key Fob Remote Compatible with 2014-2018 Mazda 3 & 6 (FCC ID: WAZSKE13D01, P/N: GJY9-67-5DY) 135. 50+ bought in past month. $9999. FREE delivery Thu, Dec 21. Or fastest delivery Mon, Dec 18. Arrives before Christmas. 1. Isolate the two wires attached to the connector harness plugs, detent the claws and cover the pins in heatshrink (i used Butyl tape). 2. Strip column down to point where the switch is accessible (I didnt do this so i wont be explaining this method at all). Replace the defective switch. 1. Remove the battery cover using the following procedure. a. Pull the clip (LH) in the outward direction approx.4 mm {0.2 in} and disengage the battery cover tabs. b. Pull the clip (RH) in the outward direction approx.4 mm {0.2 in} and disengage the battery cover tabs. c. Remove the battery cover. ks1z7.