Mazda CX-3 (2015-2024) Owner's Manual: Interior Lights NOTE Do not leave the lights on for long periods while the engine is turned off. Otherwise, the battery power could be depleted. Overhead Lights Front Rear NOTE The rear overhead light also turn on and off when the front overhead light switch is operated Explore our selection of Mazda key fobs and replacement keys to find the perfect match for your vehicle. We offer a wide range of Mazda car keys, including Mazda transponder keys, blade keys, keyless entry remotes, push start keys, and proximity keys. If you need Mazda key duplication, key cutting, or key copying services, we can guide you A quick video showing how easy it is to change the key battery on a 2015 Mazda 3Battery Type : CR2025Please like this video, and Subscribe to my Channel :)#m Answered by CarsGuide. You can certainly go to a dealer but that's not your only option. Replacing a key fob might cost more than you think.For quick and cheap solutions check out more information on how to replace a key fob here. Disclaimer: You acknowledge and agree that all answers are provided as a general guide only and should not be Step 1: Press the small knob on the key fob to reach the inside auxiliary key that starts your Mazda vehicle. Remove the key and put it aside while doing the battery replacement. Step 2: Twist a flat screwdriver into the outer gap, sliding it gently but firmly along the opening. This allows you to remove the cover of the key fob battery. Step 3 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. I wrote in the Mazda sub but have not received any help there yet, sorry for the cross post! Hello community, I got a new Mazda 3 Hatchback 2020 back in Feb. It has been amazing but today my keyless entry did not work. When trying to turn on the car the dash would say "key not detected - Hold Key fob against button". Then the car will then start. The AT light on a Mazda means there is a problem with the automatic transmission. The transmission fluid may have overheated, or there is an electrical problem. Pull over and let the engine cool down. Check the transmission fluid level. If the level is correct, the valve body or torque converter may be the issue. Here's How To Reprogram Your Key: Place the first working key into the slot. Set the ignition to the ON position. Leave it in for five seconds, and then remove the key. Repeat with the second working key. Place the new or spare key into the slot. Set the ignition to the ON position. Rpkey Leather Keyless Entry Remote Control Key Fob Cover Case protector For Mazda 3 CX-3 CX-5 CX-7 CX-9 WAZSKE13D01 SKE13D-01 662F-SKE13D01 KDY3-67-5DY. 79. $999. FREE delivery Sat, Nov 4 on $35 of items shipped by Amazon. N6xWKA.