What is the difference between RX 350h and 500h?

In simple terms, the RX 500h is the performance-oriented hybrid with a turbocharged engine and higher total output, while the RX 350h emphasizes efficiency with a more modest hybrid setup.

The two models sit at opposite ends of Lexus’ hybrid RX lineup. Both are self-charging hybrids (no plug-in option), but they diverge in powertrain design, acceleration, fuel economy, and available features. The RX 350h uses a naturally aspirated hybrid system, while the RX 500h uses a turbocharged hybrid system known as Hybrid Max, delivering markedly different driving experiences and value propositions.

Powertrain and performance

These bullets compare the core propulsion systems and how they translate to everyday driving.

• RX 350h: A 2.5-liter Atkinson-cycle inline-4 combined with electric motors and a CVT. Total system output is about 246 horsepower, with either front-wheel drive or all-wheel drive available depending on trim.


• RX 500h: Lexus’ Hybrid Max setup pairs a turbocharged 2.4-liter inline-4 with electric motors, delivering about 367 horsepower. It features electronic all-wheel drive as standard and is tuned for brisk acceleration and stronger on-road performance.

Conclusion: The 350h prioritizes efficiency and smoothness, while the 500h emphasizes performance gains and quicker response thanks to the turbocharged hybrid powertrain.

Efficiency and driving dynamics

Here’s how the two hybrids differ in real-world driving and efficiency benchmarks.

• Fuel economy: The 350h generally yields higher combined mpg due to its non-turbo, smaller-displacement hybrid setup; the 500h sacrifices some efficiency for its performance gains, resulting in lower combined mpg on average.


• Throttle response and feel: The 500h’s Hybrid Max system delivers stronger initial torque and quicker acceleration, especially in sportier driving modes, while the 350h delivers a smoother, more subdued hybrid experience.


• Drivetrain and handling: The 500h typically comes with standard e-AWD and chassis tuning aimed at livelier handling, whereas the 350h offers AWD as an option and focuses on comfort and refinement.

Conclusion: If your priority is high efficiency and a quiet, comfortable ride, the 350h is usually the better fit. If you want sharper acceleration and more dynamic performance, the 500h stands out.

Pricing, trim levels, and features

The following points highlight how the models differ in cost and equipment.

• Pricing: The RX 350h is typically less expensive than the RX 500h, reflecting the difference in powertrain complexity and performance capability.


• Standard and available features: The 500h often includes more performance-oriented or premium features by default (such as upgraded infotainment or driver-assistance tech), with additional packages available; the 350h may require higher trims to match some of those features.


• Trim spread: Both models offer similar trim names (e.g., Luxury, F Sport), but the 500h’s higher trims emphasize performance hardware and technology packages.

Conclusion: Budget-conscious buyers typically lean toward the 350h, while those who want more power and feature breadth may gravitate toward the 500h.

What to consider when choosing

Use this guidance to determine which RX hybrid aligns with your priorities and daily needs.

• Daily use and performance: If you regularly need quick passing power and stronger highway performance, the 500h is the stronger choice.


• Fuel economy and environmental impact: If maximizing efficiency and lower running costs are paramount, the 350h is typically the smarter pick.


• Ownership costs: Consider purchase price, insurance, maintenance, and resale value; the 500h may command a higher upfront price but could appeal to buyers seeking sportier capabilities.


• Plug-in capability: Neither the RX 350h nor the RX 500h is a plug-in hybrid; both are self-charging hybrids.

Conclusion: The best pick depends on whether you value performance and feature-rich trims (500h) or efficiency and a lower upfront cost (350h).

Summary

The RX 350h and RX 500h share a family look and hybrid DNA, but they diverge in purpose. The RX 350h emphasizes efficiency, smooth operation, and cost-conscious ownership with a non-turbo hybrid setup and optional AWD. The RX 500h uses a turbocharged Hybrid Max system to deliver substantially more horsepower, faster acceleration, and standard all-wheel-drive, at a higher price and typically lower fuel economy. Both are non-plug-in hybrids designed for daily driving, with the choice boiling down to whether you prioritize economy or performance.

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

Is the RX 500h worth the money?

Having tested every Lexus RX version, I can confidently say the RX 500h is the one I'd most want on a road trip. Power is important to me out on the open road, and because the RX 500h has a hybrid powertrain, you won't sacrifice as much fuel economy as you might in other, similarly powered luxury SUVs.

What is the difference between Lexus RX 350h and 450h+ and 500h?

The RX 350h features a 246-horsepower, 2.5-liter hybrid four-cylinder engine. The RX 450h+ boasts a 304-horsepower, dual-motor plug-in hybrid system with a 37-mile all-electric driving range. The RX 500h offers a 366-horsepower, turbocharged 2.4-liter, four-cylinder engine with sport all-wheel drive.

What is the lifespan of a RX 350 hybrid battery?

If you had concerns about hybrid battery replacement costs and maintenance, the estimated 15-year lifespan is certain to offer some peace of mind. You'll most likely move on from your hybrid before ever needing to consider swapping out the original battery.