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Toyota Camry Hybrid: The HV Battery Destroyer

If you have a first-generation Toyota Camry Hybrid, you will want to know what I have learned about the batteries.


Toyota Camry is one of the best-selling mid-size sedans. The hybrid version made it even more popular when fuel prices shot through the roof over a decade ago.

These cars have been out a few years now; we see where the weak points are and why. I recently bought a 2007 Camry and found out the hard way about the way these cars are eating through the traction battery. Here is what I know so far.

Toyota Camry Hybrid: Like A Prius, But Bigger
Toyota Camry is built on reliable hybrid technology. It functions similarly to Prius, seamlessly transitioning back and forth between gas and EV.

Camry Hybrid filled a niche in the hybrid market for people who wanted something larger but needed that additional fuel economy. It filled the gaps that Prius could not and become a staple part of the Toyota hybrid lineup.

What Went Wrong With The Batteries?
Toyota Camry Hybrid has a much larger engine and battery. The 34 module pack has 245V (nominal) and a 2.4L gasoline engine.

The combination is a win until Camry owners started seeing early failure in the hybrid battery pack. One hundred thousand miles or less started to become commonplace.

After buying my 2007 Camry hybrid, I called a friend who sells certified used battery modules. I told him what I needed but asked him why it seems Camry modules are required more often than Prius.

He told me that when he gets battery packs in, the ones that come from Camry are usually more deteriorated than those of a Prius. I thought this was rather interesting and asked if his results were consistent. He assured me they were after doing this for nearly a decade.

My theory is with the combination of more modules and only a fan to cool them down, the heat saturates the modules and wipes them out faster. Whatever you want to tell yourself, just know that it consistent and happens.

If you are in the market for a used Toyota Camry Hybrid, I would take a serious look at the hybrid battery beforehand. If the car has around 100k on it, check the condition with Dr. Prius first. You may be able to negotiate a better deal.

Overall these cars are pretty stable and reliable. I think once the new lithium battery conversions come out for them, we will have a real winner on our hands.

That is all for today. If you would like to discuss this topic further, find me on Facebook or Twitter. Happy to help, and remember Today's Adventure is Tomorrow's Story.

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Peter Neilson is an automotive consultant specializing in electric cars and hybrid battery technologies. He holds a Bachelor of Science in Automotive Service Technology from Weber State University. Peter can be reached on Linkedin and you can tweet him at The_hybrid_guy on Twitter. Find his page on Facebook at Certified Auto Consulting. Read more of Peter's stories at Toyota news coverage on Torque News. Search Toyota Prius Torque News for more in depth Prius coverage from our reporters.


Nestor Castro (not verified)    October 18, 2022 - 11:58PM

It is excellent to have had access to this site. I am about to buy a 2007 Toyota Camry Hybrid. There is a couple of concerns I would like to share and know if there is some answer to them. How can I determine the remaining life of the battery? Is it reflected in the dashboard somewhere? Will there be an alarm in the car indicating the coming limit of the battery life?

G Groenewold (not verified)    October 29, 2022 - 6:55AM

Thanks for sharing your views on the HV battery. When I bought my camry hybrid 2009 about 4 years ago, I was not aware of the Dr. Prius app back then, so it was a gamble. However, the car had only 86K miles on the odo and looked new to me, including the engine-department I was not aware of the HV battery issues at that time, but I just recently bought the Dr. Prius app (about 12$, you have buy the paid version to test the SOC and Life-time battery condition estimate) and a diagnostic dongle the way the car drives I bought the paid version (about 12 US$, i think) and a good bluetooth diagnostic OBD2 dongle to plug into the socket (below the plastic steering-wheel cover, above the gas-pedal). Follow the instructions for testing as presented on two youtube videos. In my case Dr. Prius app report the battery was at 69% level (bordeline cae, fair (50-70%) to good (70%-)). Of course, bad things may happen tomorrow, but I think I am pretty confident that the HV battery will survive the next few years too. This is not bad for a 14 years old car (105k miles) which does not seem to consume oil between annual (5k) oil change intervals (Valvoline 5W30). The car has been a very reliable partner, so far.