Probably getting near to failure. Southern temps are hard on batteries. Do yourself a favor and go to walmart or auto zone and get a better quality battery for less. There is nothing special about Toyota batteries.

 

I have a 2017 XLE that needed a battery around 3 years and 9 months. I pretty much got the 350 cold cranking amp story from the dealer too. I'm near Chicago, have about 44,000 miles on mine, oh and did my own test with an ODBC reader and confirmed what the dealer said as correct. Got a new AGM battery at Pep Boys on sale for 159 bucks plus 15 bucks for an install. I was prepared get a new battery, never had one in a toyota go past about 3-1/2 years.

 

I was prepared get a new battery, never had one in a toyota go past about 3-1/2 years.

I've NEVER had a battery on ANY VEHICLE last under 6 years. Still on my original battery on my 2014 HL. Still going strong. 7 years old this month and over 150k miles.

 

I would not have replaced the battery and would have let it ride for who knows how long. But when a stealership tells my wife her battery "failed" she gets nervous and doesn't want to take any chances of the car not starting unexpectedly, so we just got the batt replaced at advanced auto parts - paid $233 for an agm 24 installed. The stealership wanted I think $390.

 

My dealer's prices for batteries is competitive with parts stores, $150. I can do the installation myself, batteries are quick and easy.

 

My original battery in my 2015 Highlander just died last month. It's 6 years old and it died on a freezing morning in MA. I got an Interstate battery at Costco for $90 plus tax. I installed it myself since they don't install battery. I returned the old one to them for the core charge. The new one has CCA 700.

I noticed the beeping sound for the remote door lock/unlock was barely noticeable days/weeks before the battery was dead. Maybe it is a hint for checking the voltage or a new battery. Interestingly, all the electronics (no dim lights or starting issue) were working properly but just the weak beeping sound for the remote.

 

I also have a 15 Highlander(77k) with the original battery. Interesting info regarding the weak unlock sound. Ill keep my ears open for it.

 

Well I don't think much of Toyota batteries. The OEM battery gave up the ghost at 35 months. Luckily, it was still under the B2B warranty, so Toyota replaced it for free with a 84 month toyota battery. 37 months later the replacement battery crapped out. Went to Walmart and bought a Everstart Maxx. I've had good luck with them lasting plus 5 years.

 

Our 2015 battery died at about one year the replacement Toyota battery is going strong in its 6th year.

 

Disabling the S/S will help prolong battery life.

 

^ That's NOT a cold winter, that IS a cold week. No BFD, really.

 

Yeah you're right, I'm sure my battery pretended like it was 75F during the cold snap.