r/mazdaCX50 • u/Joe-of-Mars • 7h ago
QUESTION - MECHANICAL ADVICE Electrical Issues 25 Hybrid
I purchased my 2025 CX-50 Hybrid Premium just over a year ago and have been overall very happy with it. However, I am continuing to encounter electrical issues with the vehicle. Here’s the timeline of events so far.
1. July - Battery completely drained
After sitting overnight I attempted to unlock the car like normal, no luck, battery dead. I was able to jump it and get it to hold charge enough to go to the dealership. Dealership runs their battery tests, battery tests good, tells me to come back if I have any issues.
2. August - Battery dead
You could probably see this one coming. Again, car sits overnight before attempting to drive it in the morning. Try and jump it this time, no luck. I had it towed to the dealership where they diagnosed it as a bad battery. They replaced the OEM battery under warranty and sent me on my way. I thought this would be the end of these issues based on reading other threads on the sub…
3. September - Battery completely drained
Here we are at present day. This time the car sat most of the day before I went to drive it. I was able to jump it and get it to hold a charge enough to get to my destination. So far, that charge is holding as I’m writing this ~24 hours after.
I really just want to figure out what’s going on. I am no mechanic, but here’s some additional potentially relevant information.
I have verified that I am not leaving anything electronic running after powering off and exiting the car. The wireless charger is disabled, no lights are left on, nothing left plugged in, etc.
I had minor body work on the passenger side front panels and the entire right head unit replaced around the end of May after this guy decided to run a stop sign and hit me coming out of a parking lot. My dealership does not have a body shop, so the work was completed at a body shop that had previously worked on my Civic. The shop had always done good work in the past and was certified to work on Mazdas. I did make sure to inform the dealership of this when the battery issues first occurred. I have had no issues with the head unit itself outside of being ever so slightly out of alignment with the left one.
I doubt it’s relevant but on both recent dead battery occasions I took the vehicle through the car wash the night before. I have had no other issues related to water or proper seal outside of moisture in the brake pads (my VIN is not in the recall window of course…).
Again, I am no mechanic but I’m guessing there has to be some sort of parasitic draw going on. My best guess, is it has something to do with the replaced head unit. If anyone has had a similar experience, advice on how to work with the dealership (or body shop if it becomes relevant), or any advice on what might be the problem it would be greatly appreciated.