6th Gen 4Runner Hybrid Start Up Battery Location

[TRD JON]

The battery on the hybrid 6th Gen 4Runners is located all the way in the rear of the vehicle in the cargo area. I’m not sure yet if there are some standoffs in the engine bay in the event you needed to jump start the vehicle, I’ll try to find that out soon.

However, if you are looking to add any sort of wiring for lights or other accessories, this may pose itself as a problem for some. Likely though, Toyota gave us 4 aux locations in the engine bay tied to switches, but I am curious if this will affect the aftermarket world in anyway.

 

[sscarter]

I may be mistaken, but I suspect this is an auxiliary battery, not used for starting the vehicle. I think the High Voltage battery is used for engine starts, as explained here: https://knowhow.napaonline.com/what...brid-electric-vehicles-and-electric-vehicles/. This battery is very small, and looks like it's only used to power 12V accessories. Of course, this tiny battery for accessories would be useless for powering something like a refrigerator, which begs the question of how that might be accomplished...

 

[Trail4R]

For more information on the power and ground locations in the engine bay, check out this thread:

Thread 'Power & Ground Locations Hybrid 4Runner 2025+ (6th Gen)'

Apr 20, 2025

In the 2025+ Toyota 4Runner Hybrid (6th Gen), the 12V auxiliary battery is located in the rear cargo area, specifically on the driver side behind the driver-side rear tire. This placement is different from the gas-only models, where the 12V battery is located on the passenger side in the engine bay.

You have a couple of options for alligator clip placement and grounding purposes in the hybrid engine bay. These power and ground locations are suitable for jumping, compressors, and other 12V accessories.

Power (Positive Terminal) In Fuse Box: ​

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• Trail4R
• Replies: 1
• Forum: Maintenance