I bought a new CX-5 in 2021. Almost immediately, the key started giving me the low battery warning. I switched to the other key, same thing; it worked for a couple of months, then started giving the same message. Switched batteries, exact same scenario. Most recently I replaced the battery less than a week ago and it's already giving the same message.

Since the issue has occurred with both of the dealer-provided keys and by now about 5-6 different batteries, the battery is not likely the issue. Has anyone experienced similar problems, and is there anything I can do about it besides replacing the battery every two days?

 

That sounds very frustrating. I have had no problems with my 2022, but only 600 miles so far.

 

Sounds like a trip to the dealer is in order. This is not typical behavior. My '21 has not had this happen with either fob in the 11 mths I have owned it.

 

That sounds like corrosion in the battery connectors. My batteries recently wore out, after about 5 years, and replacement worked just fine.

 

Well - if you are still within the first 12 month 12k Warranty " adjustment period " - You should be able to get Mazda to replace the Fobs and reprogram under full warranty - IF it has been definitively determined that they are defective for whatever reason ...and have been since you took delivery /. Even the 3/36 you might still have a case /
Do you have dealer visits with attempted trobuleshooting history and service history notes ? Staying with a good service writer that properly indicates the accurate history is imparitive on this request -
I sold Maz for years and have seen every scam in the book to get warranty stuff. ~ 2 Fobs with programming is likeky $750 -+ - Possible the fobs were dropped in the toilet by the salesperson in a hurry / or PDI service techs in a hurry ,,, then dried off and put in the books - seen it happen ( well I heard the story ) - try for warranty relacement

 

My 2019 Mazda3 has the same flat keyfob. I am still on the same batteries with no problem. As others have said, take it back to the dealer. You should not be having these problems.

 

I've had my 2021 Signature for a year and I'm still using the original batteries. Something's up if you are going through them that quickly.

 

you remember to use CR2032 instead of CR2030 battery, -not ;-)

 

I am having a similar issue, I have had my car not quite 2 months and changed the battery once and it came up low battery again. when I changed the battery again I checked the old one and the old battery was fine, Any thoughts about this?

 

My 19 used to do that at times. Low battery would come up and the fib works risk fine afterwards. My 21 has yet to have the issue.