Hybrid Battery Pack replacement options??

mr_avak · May 5, 2022

Hi. New here but I've owned Toyota's for a long time and have used this site countless times for research.

The original Hybrid Battery Pack on my '09 Highlander Hybrid is starting to fade away towards failure. I'm very mechanically inclined, so I have no issue with replacing it myself. The problem seems to be WHERE to find one as there are very few vendors outside of Toyota itself. The battery that I need is Toyota part G9510-48032. I have been able to find replacements for it ranging in price from approximately $2,100 to $3,800 (Toyota) through the following:

1. Toyota (of course)
2. "besthybridbatteries dot com"
3. "greentecauto dot com"
4. "greenbeanbattery dot com"
5. Dorman thru RockAuto dot com

Other than Toyota, I have no experience with the quality of these vendors and the parts that they sell. I've searched the internet, but like anything else with the internet there are a dozens of different answers leading to nothing conclusive. So ... I thought I would try to find something a little more definitive here ... with the actual people who may have used one of these vendors to replace their own battery in their own car. If you have, I would love to hear from you here. Thanks in advance for your time and contribution.

Cheers!
Tom

Minnkato · May 6, 2022

Since you are gifted mechanically and possibly electrically you could consider testing, and replacing the bad cells, I think you can buy them separately. Seems like a lot of work to me when Green Bean does it with a warranty for about $2300.00 installed at your home. Not sure if those packs have any longevity though. Keep us posted on what you decide. It would also be interesting to know the symptoms of a tired trac, battery if you have some.

mr_avak · May 6, 2022

Sure. Here is what happened to my Highlander ...

I could not manually select EV mode anymore. Whenever I tried, I would get a "EV mode not available" or a "EV mode not available - low battery" message.

So I googled it. What I found is that the "EV mode not available - low battery" message is usually preceded by:

1. a gradual decrease in average MPG - yep, that was happening ...
2. the gas engine starting immediately after starting the car - yep, that was happening ...
3. the gas engine starting more frequently when stopped at a traffic light - yep, that was happening too ...
4. the battery state of charge indicator no longer indicating a full charge - yep, it was always something less than a full charge.

As I said, I didn't pick up on what was actually happening until I started getting the "EV mode not available - low battery" message. When I started getting that, I googled it and all the rest was right there in front of me. I just wasn't hybrid smart enough to correlate all of the symptoms to a failing battery before I got the message.

I don't like the idea of forking out big bucks for a new hybrid battery. However, I really can't complain too much ... the original OEM battery lasted 13 years and 167,000 miles.

Cheers!
Tom

Minnkato · May 6, 2022

Thanks for the information Tom, I’m sure you are weighing all the factors of investing in your 09’, as stated, hard to pencil in over 2k but in the grand scheme transmissions cost more and seem to be a much more common failure in many cars these days. Wonder how long you can go before you get a no start? I used to push for high MPG then learned that using Econo mode and EV mode just taxes the battery and could shorten its life. Keep us posted. Thxs

Hybrid Battery Pack replacement options??

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