Battery OEM Mazda or OEM KIA

I'm at over 90k miles in a 2022 Kia EV6 and haven't had an ICCU issue. All I've done outside normal wear and tear like tires is upgraded to an AGM 12V battery to solve crappy OEM battery problems

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.

When i changed my battery in my Kia eSoul (same car, different brand) the only thing that happened was that the aux bat SOC said 255 for some time. Then car calibrated itself to the new battery and said the right value.

the cars are decent, the customer service at the dealers, hit or miss.

the Vancouver (Coquitlam) dealership i bought my Kia from knew jack squat about my car - I basically just needed them to sell me a car, that I knew more about at the time of sale than they did.

went to a different one, and got a much better experience, they were willing to sit down and talk to you about what the problems were, what options were, etc. So in short, the early EVs (like the one I drive) were kinda iffy depending on your experience, could be great could be terrible, but the classic ioniq is one I would hands down trade in for. The extra cobalt inside the cells means the degradation happens less, it doesn't overheat as quickly, charges reasonably fast, and more efficient than tesla :p

Mazda uses cheap batteries, I have had to swap them on my last two CX5s

My cx30’s 2023 battery died as I was coming to a stop sign. As I was rolling to the stop sign my breaks failed hit the car Infront of me and the could not get my car to start.

Mazda OEM batteries known for underpowered and short shelf life. If you are in any kind of extreme climate for more than one season, there's a likely chance of failure.

162km at 42% battery is still kinda poor for 2025.

My 2025 CX-30 battery is already showing signs of dying but I bought the car in April but then had surgery in June and only went back to work today so it sat for long periods and I do leave my dash cam in parking mode. It might come back some after being driven more or it might not.