[Cristin Chobanian]

I have had my 2006 Toyota Tundra for around 5 years now, and within these 5 years I have had 4 or 5 new batteries. Each battery lasts between 6 months to a year. I have a sub and amp hooked up, but I did some testing and took them out for around a year and the battery still died. After about 6 months to a year, if I let the truck sit for 2 or more days it won't start. No clicking, no nothing. I have my suspensions about my alternator, but I wanted to see if this was a common problem in the 2006 Toyota Tundra series. I have gotten my batteries from at least 2 different places; Autozone and a battery shop that also sells golf carts in town. (Also, im new here so hello!)

 

[Jonesy]

You might consider taking your vehicle to an auto electric shop where they can test and diagnose your issue.
I had a friend trade in a Sequoia for this very reason ~ nobody could correctly diagnose and fix his problem.
A vehicle in constant use should have no issues with a dead battery provided everything else in the system is functioning properly.
Please keep us posted with your results. We can all learn something here.

 

[rydllan]

Maybe there's a slow parasitic drain somewhere.

 

[Joan818]

I have had my 2006 Toyota Tundra for around 5 years now, and within these 5 years I have had 4 or 5 new batteries. Each battery lasts between 6 months to a year. I have a sub and amp hooked up, but I did some testing and took them out for around a year and the battery still died. After about 6 months to a year, if I let the truck sit for 2 or more days it won't start. No clicking, no nothing. I have my suspensions about my alternator, but I wanted to see if this was a common problem in the 2006 Toyota Tundra series. I have gotten my batteries from at least 2 different places; Autozone and a battery shop that also sells golf carts in town. (Also, im new here so hello!)

We had the same problem with our 2007 Sequoia. Losing batteries every 4 - 6 months. After having two electrical checkups that did not solve the problem, we found a mechanic that was able to help. He said that we should always lock our doors using our key when it is not in in use for any extended time. This has solved the problem for us. We have not had to replace our battery in the past 4 years.

 

[Remmy700P]

You have a parasitic drain somewhere in your electrical system. The aftermarket stereo system is a clear suspect. Also look closely at all trailer harness wiring in the back.

 

[mmatundralover28]

I have had my 2006 Toyota Tundra for around 5 years now, and within these 5 years I have had 4 or 5 new batteries. Each battery lasts between 6 months to a year. I have a sub and amp hooked up, but I did some testing and took them out for around a year and the battery still died. After about 6 months to a year, if I let the truck sit for 2 or more days it won't start. No clicking, no nothing. I have my suspensions about my alternator, but I wanted to see if this was a common problem in the 2006 Toyota Tundra series. I have gotten my batteries from at least 2 different places; Autozone and a battery shop that also sells golf carts in town. (Also, im new here so hello!)

Hey goodmorning. I have a simple solution for you to try that I have been hearing from other tundra owners with similar circumstances. So disconnect the battery terminals. Get yourself some electrical contact cleaner from lowes. Also get some emery cloth sandpaper I use 240grit. Spray both leads even the terminal powering your amp. Sand any corrosion off. Do the same to the bolts holding your o-ring terminals to the battery. Sprey em, sand em, spray em again and wipe clean with a towel. Put them back on, and start her up. Let me know if that helps you. Thanks