What is the difference between a Lexus RX 350h and RX 450h?
The Lexus RX is a popular luxury SUV that comes in two hybrid variants: the RX 350h and the RX 450h. While both models offer a blend of performance, efficiency, and premium features, there are some key differences between the two that buyers should consider.
Powertrain and Fuel Economy
The primary difference between the RX 350h and RX 450h lies in their powertrain configurations. The RX 350h is powered by a 2.5-liter four-cylinder engine combined with an electric motor, delivering a total system output of 308 horsepower. The RX 450h, on the other hand, features a larger 3.5-liter V6 engine paired with two electric motors, producing a combined output of 308 horsepower as well.
In terms of fuel economy, the RX 350h is the more efficient option, with an EPA-estimated 33 mpg in the city and 30 mpg on the highway. The RX 450h, while still highly efficient, achieves slightly lower ratings of 31 mpg in the city and 28 mpg on the highway.
Performance and Driving Dynamics
Despite the difference in engine size, both the RX 350h and RX 450h offer similar performance characteristics. The RX 350h can accelerate from 0 to 60 mph in around 7.7 seconds, while the RX 450h can do the same in approximately 7.9 seconds.
However, the RX 450h's larger V6 engine may provide a slightly more responsive and engaging driving experience, especially at higher speeds. Both models offer a smooth and comfortable ride, with the RX 450h potentially offering a bit more power and refinement.
Pricing and Trim Levels
The Lexus RX 350h and RX 450h are priced similarly, with the RX 350h starting at around $48,000 and the RX 450h starting at around $51,000. Both models offer a range of trim levels and optional packages, allowing buyers to customize their vehicle to their specific needs and preferences.
In summary, the key differences between the Lexus RX 350h and RX 450h lie in their powertrain configurations, fuel economy, and potential performance characteristics. Buyers should consider their driving needs, budget, and personal preferences when deciding between these two hybrid SUV options.
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.
Is there any problem with the Lexus RX 450h?
Common Lexus RX 450h problems include issues with the hybrid system (battery degradation, inverter coolant pump failure), brake system (brake actuator malfunction), and electrical components (12V battery drain, faulty electrics). Other potential issues involve suspension wear, cracked dashboards, and fuel pump failures.
This video discusses some common issues with the Lexus RX 450h: 57sMasterCarsProYouTube · May 13, 2023
Hybrid system issues
- Hybrid battery: Hybrid batteries can degrade over time, leading to reduced fuel economy and performance. Regular maintenance and hybrid health checks can help prolong its life.
- Inverter coolant pump: The inverter cooling pump can fail, which may lead to overheating and warning lights. Sensors are in place to provide a warning before a critical failure, so it's important to heed any messages on the instrument panel and have the coolant level checked.
- Hybrid system warning: A "Check Hybrid System" warning can indicate an issue, which can be confirmed with a diagnostic scan.
Brake and suspension problems
- Brake actuator: The brake actuator is a frequently reported issue, with some owners needing multiple replacements.
- Brake issues: Some owners have reported problems with brake boosters and rust on the brake discs, possibly from energy regeneration.
- Suspension: Due to the vehicle's weight, suspension components like air compressors and shock absorbers can wear out or leak.
This video discusses potential issues with the Lexus RX's brake system: 56sEEPRODUCTIONSKLBYouTube · Apr 14, 2020
Other common problems
- 12V battery: The smaller 12V battery can drain quickly, especially when the car is not used for a few weeks, and can cause a variety of electrical faults. Some owners report having to replace it frequently.
- Cracked dashboards: Dashboards, particularly in cars driven in hot, sunny climates, have been reported to crack over time.
- Fuel pump: Some models have a recall for a faulty low-pressure fuel pump.
- Electric window motors: The electric motors for the power windows can sometimes break.
You can watch this video to learn more about problems with the Lexus RX's electric window motors and other components: 54sThe Miles DrivenYouTube · Dec 18, 2024
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.
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
