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What is the battery capacity of the Lexus RX 450h?

The Lexus RX 450h, a hybrid luxury SUV, has a battery capacity of 1.9 kWh. This battery powers the electric motor and assists the gasoline engine, providing improved fuel efficiency and reduced emissions compared to a traditional internal combustion engine vehicle.


Battery Capacity and Performance


The Lexus RX 450h is equipped with a nickel-metal hydride (NiMH) battery pack that has a capacity of 1.9 kWh. This battery pack is located under the rear seats, helping to maintain the vehicle's cargo space and overall balance. The battery works in conjunction with a 3.5-liter V6 gasoline engine, providing a combined system output of 308 horsepower.


The battery's primary role is to power the electric motor, which can propel the vehicle on its own at low speeds or assist the gasoline engine during acceleration. This hybrid system allows the RX 450h to achieve an EPA-estimated fuel economy of 31 mpg in the city and 28 mpg on the highway, significantly better than the non-hybrid Lexus RX models.


Charging and Regenerative Braking



  • The RX 450h's battery is recharged through the vehicle's regenerative braking system, which captures energy that would otherwise be lost during braking and stores it in the battery.

  • There is no need to plug in the RX 450h to charge the battery, as it is continuously recharged during normal driving and braking.

  • The battery is designed to provide reliable performance for the life of the vehicle, with Lexus offering a standard 8-year/100,000-mile warranty on the hybrid components.


The Lexus RX 450h's 1.9 kWh battery capacity, combined with its efficient hybrid powertrain, allows the vehicle to deliver impressive fuel economy and performance while maintaining the spaciousness and luxury expected from a Lexus SUV.

What is the range of the 2024 RX450h+?


540 miles



How much does it cost to replace a Lexus RX 450h hybrid battery?


The average cost for a Lexus RX450h Hybrid High Voltage Battery Replacement is between $7,814 and $7,911 but can vary from car to car.



Does the 2024 Lexus RX Hybrid require premium gas?


2024 Lexus RX 350h Fuel Type & Tank Size
The plug-in hybrid RX 450h+ Luxury trim offers a 14.5-gallon tank, leaning more into its electric capabilities. Across the lineup, every Lexus RX Hybrid model is engineered for peak performance using premium unleaded gasoline.



How many miles per gallon does the 2024 Lexus RX 450h hybrid get?


2024 Lexus RX Hybrid MPG
Below, you'll find the Lexus RX Hybrid MPG estimates for each of the models: Lexus RX 350h AWD: 37 city / 34 highway / 36 combined* Lexus RX 500h AWD: 27 city / 28 highway / 27 combined* Lexus RX 450h+ AWD: 83 MPGe**



How many kWh battery is in the Lexus RX 450h?


18.1-kWh
The RX450h+ has a naturally aspirated 2.5-liter inline-four plus three electric motors; this is the same all-wheel-drive setup found in the NX450h+ and Toyota RAV4 Prime. It has a 6.6-kilowatt onboard charger that can charge the 18.1-kWh battery pack in two and a half hours using a 240-volt outlet.



How far can the Lexus RX 450h go on electric?


37 miles
An 18.1-kWh battery pack, same as in the NX, feeds those e-motors, and the EPA estimates EV range at 37 miles, same as the NX but less than the RAV4's 42.



How long does a Lexus 450h hybrid battery last?


Under average driving conditions, you'll need a hybrid car battery replacement roughly once every 150,000 miles or 15 years, whichever comes first.


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.