What is the difference between Lexus RX450h and 350h?
The RX450h is the higher-performance hybrid with a larger engine-based hybrid system, while the RX350h focuses on efficiency with a smaller hybrid setup. In practice, the 450h offers stronger acceleration, more drivetrain options in some generations, and often higher pricing, whereas the 350h emphasizes fuel economy and a lower sticker price. This article breaks down the key distinctions and what they mean for everyday use, ownership costs, and practicality.
Powertrain and performance
Overview of what powers each model
Before diving into the specifics, here is a side-by-side look at the core differences in the powertrains and how they translate to on-road performance.
- Engine configuration: RX450h typically pairs a larger internal-combustion engine with electric motors to deliver higher total output; RX350h uses a smaller four-cylinder hybrid system for efficiency.
- Drivetrain availability: The RX450h variant has historically offered all-wheel drive more commonly as standard or widely available, while the RX350h can be found with either front- or all-wheel drive depending on the market and model year.
- Performance emphasis: RX450h is geared toward stronger acceleration and higher power reserves, suitable for highway merging and towing in some configurations; RX350h prioritizes smooth, efficient daily driving.
- Special variants: In earlier generations, extended-wheelbase versions of the RX450h (often called RX450hL) added extra passenger space and, in some setups, a third-row option. The RX350h did not typically offer that extended layout.
- Real-world efficiency: Both are hybrids, but the four-cylinder RX350h tends to eek out better city mpg in certain years, while the V6-based RX450h aims for a balance of power and efficiency. Actual figures vary by year, market, and drivetrain configuration.
In short, the RX450h is the more powerful, performance-oriented hybrid, while the RX350h targets efficiency with a smaller hybrid setup.
Practical considerations: space, price, and features
What you get inside and how it affects ownership
Next, consider how differences in seating, cargo space, and equipment impact daily use and total ownership cost.
- Seating and cargo: The RX450hL (the extended-wheelbase variant linked with the RX450h family in some generations) offered additional rear-seat and cargo capacity, while base RX450h and RX350h configurations typically provide two rows of seating. Availability of three-row seating varies by year and market.
- Pricing: The RX450h generally carries a higher starting price than the RX350h due to its larger powertrain and premium features in many trims.
- Interior features and trims: Higher trims for the RX450h often include more luxury appointments and technology options, whereas the RX350h presents a more budget-friendly entry point with fewer standard features on base models. Equipment can vary by market and year.
- Fuel economy and running costs: Both models offer Lexus hybrid reliability, but the RX350h can edge out better city mpg in some configurations due to the smaller engine, while the RX450h balances power with efficiency depending on the year and drivetrain.
- Market and year variations: Naming, availability, and specifications differ by region and model year. Always verify the exact specs for the year and country you’re considering.
Overall, the RX450h tends to be the choice for buyers who want more power and optional higher-end features, while the RX350h appeals to those prioritizing efficiency and lower upfront costs.
Which should you choose?
Choosing between them depends on your priorities. If you value stronger acceleration, potential all-wheel-drive capability, and potentially more seating or cargo options in certain forms, the RX450h is the better fit. If you prioritize lower purchase price, higher efficiency, and straightforward ownership costs for daily driving, the RX350h is the sensible pick. Always compare the exact year, market, and trim to ensure you’re evaluating equivalent configurations.
Summary
The Lexus RX450h and RX350h are two hybrid variants aimed at different buyers. The RX450h offers more power, often broader drivetrain options, and higher-end features in many trims, while the RX350h emphasizes efficiency and affordability with a smaller hybrid system. Market and year differences can alter specifics, so check the exact specs for the model year you’re considering. Both share Lexus reliability and hybrid technology, making either a strong choice depending on your priorities.
What year to stay away from Lexus RX 350?
Years to avoid for the Lexus RX 350 include 2007, 2008, 2010, 2016, and 2017 due to common problems like oil leaks, engine issues, brake failures, and faulty sensors. The 2010-2012 models are particularly prone to a ruptured oil cooler line that can cause engine failure, while the 2007-2009 models had issues with cracking dashboards and a faulty brake master cylinder. The 2016 and 2017 models saw recalls related to airbags and issues with rain sensors, notes CoPilot.
You can watch this video to learn about the history of the Lexus RX 350 and common problems in different generations: 1mThe Miles DrivenYouTube · Dec 22, 2024
Years to avoid and why
- 2007–2009: These models are known for cracking dashboards and a faulty brake master cylinder that can lead to brake failure.
- 2010–2012: A common and severe problem with these years is the oil cooler line, which can rupture and lead to engine failure.
- 2016–2017: The 2016 model year had airbag recalls and was the first year of a new generation, which can lead to early bugs. The 2017 model had issues with the rain sensor and wipers, in addition to having its own airbag recalls.
What to look for instead
- 2011–2015: These models generally have fewer issues, with the 2013–2015 models in particular being noted as more reliable.
- 2018–2022: Models from these years are considered more reliable, especially those with the redesigned exterior.
- 2020–2022: These are considered among the most reliable years, with the 2020 model year being a good choice.
This video discusses the best Lexus RX 350 years to buy: 59sThe Miles DrivenYouTube · Dec 18, 2024
What are the common problems with the RX 450h?
Worn CV joints. Damaged motor or transmission mounts. Wheel alignment issues.
What is the difference between Lexus RX 350h and 450h?
The main difference is that the RX 350h uses a 2.5L 4-cylinder hybrid engine, while the RX 450h uses a 3.5L V6 hybrid powertrain. This results in the RX 450h having more power, better acceleration, and higher fuel efficiency, whereas the RX 350h has a lower starting cost and the same powertrain as the non-hybrid RX 350.
| Feature | RX 350h | RX 450h |
|---|---|---|
| Engine | 2.5L 4-cylinder hybrid | 3.5L V6 hybrid |
| Combined Horsepower | Approximately 246 hp | Approximately 308 hp |
| Fuel Efficiency | Generally lower | Generally higher |
| Acceleration | Slower than the 450h | Quicker and smoother |
| Cost | Lower starting price | Higher starting price |
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You can watch this video to learn about the differences in performance and features: 58sMarek Drives in EnglishYouTube · Jul 7, 2023
Key takeaways
- Performance: The RX 450h offers superior performance with its V6 hybrid setup, providing quicker acceleration and a more powerful feel. The RX 350h's acceleration is good for a hybrid, but not as quick as the 450h.
- Fuel Economy: The RX 450h is typically more fuel-efficient than the non-hybrid RX 350 due to its larger hybrid battery, and both have better fuel economy than the standard RX 350, which is also available in front-wheel-drive or all-wheel-drive configurations.
- Cost: The RX 350h has a lower initial cost, making it a more budget-friendly option for buyers who prioritize value.
- Drivetrain: Both models are available with all-wheel-drive, and both use a hybrid system that provides a smooth and quiet ride.
How many miles per gallon does a Lexus RX 350 get compared to a 450h?
The RX 350h is rated to deliver an average of 36 miles per gallon, with a highway range of 585 miles. The RX 450h is rated to deliver an average of 30 miles per gallon, with a highway range of 482 miles. This gives the Lexus RX 350h the fuel efficiency and maximum range advantage over the Lexus RX 450h.
