What is the mileage on a Lexus RX 400h Hybrid?
The Lexus RX 400h Hybrid typically achieves about 25 miles per gallon (mpg) combined. Official EPA estimates during its production years commonly placed it around 26 mpg in city driving and 24 mpg on the highway for the AWD configuration, with real-world results often in the low to mid-20s depending on conditions.
EPA fuel economy figures
These figures come from the EPA tests used when the model was on sale and reflect hybrid operation and drivetrain efficiency. The RX 400h’s most commonly cited benchmark is roughly 25 mpg combined (about 26 mpg city and 24 mpg highway for typical AWD models).
- 2005–2009 Lexus RX 400h (hybrid AWD): EPA estimates commonly cited as around 26 mpg city / 24 mpg highway / 25 mpg combined.
- Year-to-year variations were relatively small, typically within 1–2 mpg depending on test cycle and specific configuration.
Overall, these figures provided a baseline for planning fuel costs when the model was on sale, though actual results vary with driving style and maintenance.
Model-year and drivetrain notes
In the United States, the RX 400h was primarily offered with all-wheel drive in its hybrid form, and the cited EPA ratings reflect that configuration. Some overseas markets had different specs, but the numbers above represent the standard baseline most owners reference.
Real-world mileage and factors affecting fuel economy
Real-world performance often differs from EPA numbers due to traffic patterns, climate-control use, battery health, and how the hybrid system operates in urban versus highway driving. Typical mixed-driving mileage for the RX 400h generally lands in the low to mid-20s mpg, with higher results on longer highway trips.
- City driving: commonly around 18–26 mpg, depending on congestion and A/C use.
- Highway driving: roughly 24–28 mpg with steady speeds.
- Combined/mixed driving: frequently reported in the 22–26 mpg range by owners.
Battery condition and overall hybrid-system health, along with maintenance like tire pressure, can noticeably influence real-world results.
Tips to maximize mileage
To squeeze more miles out of the RX 400h, consider regular maintenance, proper tire inflation, and mindful driving habits.
- Keep tires inflated to the recommended pressure; underinflated tires increase rolling resistance and reduce efficiency.
- Follow a regular maintenance schedule for the engine, hybrid battery, and filters to keep performance optimal.
- Drive smoothly: gradual acceleration, steady speeds, and gentle braking improve mpg.
- Use climate controls efficiently: preconditioning when plugged in and moderate A/C use helps conserve energy.
- Minimize weight and drag: remove unnecessary cargo and roof racks when not needed.
With proper care and mindful driving, the RX 400h can approach its EPA estimates, though individual results will vary.
Summary
The Lexus RX 400h Hybrid generally delivers about 25 mpg combined, with EPA figures commonly cited as roughly 26 mpg city and 24 mpg highway for AWD versions. Real-world mileage varies, typically in the low-to-mid 20s for mixed driving, and can improve on longer highway trips. Maintenance, battery health, and driving style are key factors in the actual mileage you’ll see.
