Mazda CX3 Battery Drain and Starting Issues: Possible Sensor Malfunction?

Hey there, I can definitely understand the issue you're facing. Got a 2019 Mazda CX5 myself and experienced something similar not too long ago. It was having difficulty starting and would often drain the battery. Turns out it was indeed a defective battery sensor microprocessor, just like what you're suspecting. This issue does nudge into the moderate serious area as it's important to get it fixed promptly to prevent potential damage to the battery unit and to ensure your car continues to function properly. Typically, it involves replacing the battery sensor to make sure it can accurately determine if the battery's charged or should be charged. But remember, don't panic. Since it's a pretty common problem with these models, most garages should be able to handle it with no fuss. Try to find a reputable garage to avoid any unpleasant experiences. I got my situation handled smoothly, and there's no reason you can't too. Good luck!

Hey! Thanks for the reassurance. It seems like we're indeed on the same page, and I'm relieved to hear your case was sorted out smoothly. Pardon my curiosity, but do you recall roughly how much they charged you to replace the battery sensor? And has anything else cropped up related to this issue since they fixed it? Thanks and cheers in advance!

Hey there! Absolutely no worries at all. I'm all for helping a fellow Mazda driver out. So, for me, the cost to sort out that defective battery sensor microprocessor came to 315€. Fair warning, prices could slightly vary based on where you are and the garage you choose. And to answer your second question, since getting it fixed up, I haven't had any more troubles with the battery sensor. It's been smooth sailing ever since - starts like a dream, every time. The way I see it, if you got a solid mechanic on the job, you should be golden too. So, chin up. All the best!

Brilliant! Thanks for that. Honestly, your insight took a weight off my shoulders. 315€ seems a fair price to get this annoyance fixed and, fingers crossed, it'll be the end of this issue for me too. I'm gonna start hunting for a reliable garage this weekend itself. Glad to hear your issue got sorted without a hitch. Happy and safe driving ahead! Cheers!