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Where is the 12 volt battery in Lexus is300h?

The 12 volt battery in a Lexus IS300h hybrid vehicle is located in the trunk, behind the rear seats. This battery powers the vehicle's electrical systems and accessories when the main hybrid battery is not providing power.


Detailed Explanation


The Lexus IS300h is a hybrid electric vehicle that combines a gasoline engine with an electric motor and battery pack. While the main hybrid battery, typically a high-voltage lithium-ion battery, powers the vehicle's electric drivetrain, a separate 12 volt battery is used to power the car's electrical systems and accessories, such as the lights, infotainment system, and other electronics.


In the Lexus IS300h, the 12 volt battery is located in the trunk, behind the rear seats. This placement is common in many hybrid and electric vehicles, as it helps to optimize the use of available space and keep the battery easily accessible for maintenance and replacement.


Accessing the 12 Volt Battery


To access the 12 volt battery in a Lexus IS300h, you will need to follow these steps:



  • Open the trunk and locate the access panel or cover that conceals the battery.

  • Remove the access panel or cover, which may be secured with screws or clips.

  • Once the battery is exposed, you can inspect it, clean the terminals, or replace the battery if necessary.


It's important to note that the 12 volt battery in a Lexus IS300h is not the same as the main hybrid battery pack, which is a high-voltage component that should only be serviced by trained technicians. The 12 volt battery is a standard lead-acid battery that can be replaced by the vehicle owner or a qualified mechanic.

Does the Lexus hybrid have a 12V battery?


To recap, Lexus hybrids generally contain two batteries: a 12-volt battery (which powers systems such as the headlamps and audio) and a high-voltage hybrid system battery (which supplies the power to start the combustion engine and drive the electric motors).



Where is the 12V battery on a Lexus 300h?


The Lexus 300h 2025 features a main 12V battery typically located in the engine bay, with an auxiliary battery under the rear seat or trunk.



Where is the 12 volt battery in a hybrid?


This cover again just pops up when it should do. Yeah I normally do. And there we go that is our 12 volt battery. And we are we have the same one 45 amp hour 325 cold cranking amps.



What 12V battery for Lexus IS300H?


Lexus IS300H Battery Genuine 12V 45AH Auxiliary Battery Oem 28800-AZC35 S46B24L.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.