My car is also a 2016 and it's on the original Varta battery.
Just replaced battery on my Mazda 3 2018.
Di naman inabot ng hindi na ma-start. The i-stop orange sign started blinking + warning sign = i knew battery voltage was low.
Stated the battery was going bad, my thanks to Autonation for letting me get the inspection done and replacing the battery with a Varta AGM (I believe factory spec). Basically I love this car
I replaced mine with a higher capacity Varta 44ah 420cca battery, never had a flat since
Stock OEM Mazda CX5 battery is weak AF. My 2019 battery died in Jan 2024 after coming back from Disney trip that lasted 7 days. Got one from Costco. Higher CCA for less than OEM from Mazda. Installed myself.
Just last week I had to change the original battery, because I was abroad for almost three months and the car had not been started even a single time. I left it outside and it's been constant -1/-5 Celsius here. So naturally the battery went.
The factory battery is rubbish though. So get a better branded battery - varta or Bosch are good.
Worst part about Mazda cars - battery can silently die on you. Instead once you're ~3 years in you're gambling every time you go for a drive.
OEM batteries are crap, replace it with something better, preferably an EFB one. Also, a healthy battery should withstand that time and even more, so yours was definitely at its end.
My car was sitting in parking lot with engine OFF and ignition ON - Android Auto was working and headlights/interior lights -> after about 15min music stops playing and I thought okay it's energy saver mode let me start engine.
But NOPE, there were some error messages, and engine couldn't start - battery was DEAD, I read battery are shit on new Mazdas and didn't want to deal with it myself and get it towed because of warranty.
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