What is the difference between Lexus 450h and 450h+?

The RX 450h is Lexus’s standard self-charging hybrid version of the RX, while the RX 450h+ is the plug-in hybrid variant with a larger battery and external charging capability, allowing a limited electric-only driving range.

Drivetrain and powertrain differences

Understanding how the two systems generate and deliver power helps clarify why they feel different in daily driving.

Before the list, here are the core distinctions in how they power the vehicle.

• RX 450h: A traditional self-charging hybrid that combines a gasoline engine with electric motors. Power is produced by the engine and recovered through braking, with the battery recharged by the hybrid system itself. It does not offer external plug-in charging.


• RX 450h+: A plug-in hybrid that uses a gasoline engine plus electric motors along with a noticeably larger battery. It can be charged from an external power source and can run on electricity alone for a limited range before the gasoline engine engages.


• Engine/motor configuration: The 450h commonly uses a V6-based hybrid layout, whereas the 450h+ employs a plug-in hybrid setup that typically relies on a more compact engine plus dual electric motors to optimize efficiency and electric-drive capability.

In practice, the 450h focuses on seamless hybrid operation and long-range fuel economy without charging stops, while the 450h+ emphasizes electric driving flexibility in addition to hybrid performance.

Battery, charging and electric range

Battery size and the ability to recharge from an external source are the main technical differentiators here, influencing range, charging times, and daily usability.

Before the list, a brief note on what to expect in this area.

• 450h: Uses a smaller battery that supports the hybrid system. There is no external charging capability, so all energy is managed by the hybrid drivetrain and regenerative braking.


• 450h+: Uses a substantially larger battery that can be replenished via standard home or public charging. It offers a configurable electric-only driving mode, enabling short trips without using the gasoline engine.


• Electric range: Depending on market and test cycle, the 450h+ delivers a limited electric-only range (roughly in the 30–40 mile neighborhood on common cycles), after which the vehicle operates as a conventional hybrid.


• Charging times: With a Level 2 (240V) charger, replenishment times are typically a few hours, while Level 1 charging (120V) takes longer. Availability of charging infrastructure and ambient conditions affect real-world results.

Overall, the 450h is powered purely by hybrid energy management, while the 450h+ adds the ability to top up the battery from external sources and drive on electric power for a portion of typical daily use.

Market availability and branding

Where you can buy them and how Lexus badges them varies by region, which can affect how you compare these two models.

Before the list, here is how availability typically breaks down by market.

• RX 450h: Widely offered in many regions as the conventional hybrid version, often paired with all-wheel drive options.


• RX 450h+: Available in markets that offer plug-in hybrids, such as parts of Europe, Asia, and Oceania. In some regions, it carries the RX 450h+ badge to indicate plug-in capability.


• Regional nuance: In certain markets, the plug-in variant may be offered alongside or separate from other RX hybrid trims depending on emissions regulations and demand.

If you’re shopping, check the local Lexus lineup to confirm which RX 450h or RX 450h+ options are currently available and how they’re badged in your country.

Real-world performance, efficiency and ownership considerations

Practical implications for daily driving include how each system behaves in city commuting, highway cruising, and charging routines.

Before the list, these are the real-world implications to weigh when choosing between them.

• City use and EV mode: The 450h+ generally shines in urban driving where short trips can be completed in electric mode, maximizing fuel savings when charging is convenient.


• Longer trips: Both models merge into hybrid operation for efficiency on longer highway runs, but the 450h+ can reduce fuel use more when the battery is regularly charged.


• Ownership costs: The plug-in variant may have higher upfront costs and requires charging infrastructure to maximize benefits, though potential tax incentives or grants in some regions can offset the difference.


• Maintenance and reliability: Both share Lexus’s reputation for reliability, but the plug-in system adds battery and electrical components that may influence service considerations over time.

In short, the 450h delivers familiar hybrid operation with no external charging, while the 450h+ adds EV capability and charging flexibility that can lower running costs when used with charging available.

Bottom line

For buyers prioritizing maximum seamless hybrid efficiency with minimal charging considerations, the RX 450h is the straightforward choice. If you want the option to drive short distances on electricity and reduce gasoline use when you can plug in, the RX 450h+ provides that plug-in flexibility along with the familiar Lexus hybrid refinement.

Summary

The RX 450h and RX 450h+ share the same RX design language, but they diverge in propulsion philosophy: the 450h is a conventional self-charging hybrid with no plug-in capability, while the 450h+ is a plug-in hybrid with a larger battery, external charging, and a limited electric-only driving range. Availability varies by market, and the choice depends on how often you can access charging and how much you value electric-only driving in daily use.

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

The main difference is that the "450h" refers to a standard hybrid model, while the "450h+" specifically denotes a plug-in hybrid (PHEV) model that can be charged externally for a significant electric-only driving range. The "+" model typically has a more powerful plug-in hybrid system and a higher price point, but offers greater efficiency and the ability to run on pure electricity for daily commutes. The regular 450h uses a self-charging hybrid system without external charging capabilities. 
Lexus 450h+ (Plug-in Hybrid) 

• Electric Range: Offers a manufacturer-estimated 37 to 38 miles of all-electric driving range after being charged externally. 
• Performance: Delivers stronger performance and acceleration, with a combined 304 to 308 horsepower. 
• Fuel Efficiency: Generally more efficient due to its ability to use electric power for short trips, but will still use premium unleaded gasoline. 
• Charging: Requires external charging to utilize its full electric range. 
• Price: Typically has a higher starting price than the 450h model. 

Lexus 450h (Standard Hybrid)

• Electric Range: Does not have a dedicated all-electric driving range because it is a self-charging hybrid, not a plug-in hybrid. 
• Performance: Has a lower net horsepower compared to the 450h+ model, with a total of 246 horsepower for the RX 350h model. 
• Fuel Efficiency: Provides excellent fuel efficiency for everyday driving through its self-charging system, with no need for external charging. 
• Charging: Does not need to be plugged in; it charges its battery using the gas engine and regenerative braking. 
• Price: Is more affordable than the 450h+ model. 

How many miles per gallon does a Lexus 450h+ get?

Running on 91 octane, the fuel economy is rated at 35 mpg on gasoline alone in city and highway tests with 37 all-electric miles when fully charged.

What are common RX 450h problems?

RX 450h models are fairly heavy and often develop suspension problems. Some owners report leaks in the system, while others report the compressor wears out quickly and has to be replaced.

How long does a Lexus RX 450h hybrid battery last?

A Lexus RX 450h hybrid battery typically lasts between 150,000 and 200,000 miles, or approximately 15 years, under normal driving conditions. However, this is an average, and factors such as driving habits can cause the battery to last longer or require replacement sooner. 
Factors that influence hybrid battery life

• Driving style: Aggressive driving can put more strain on the battery, while a smooth, consistent driving style can extend its life. 
• Climate: Extreme temperatures can impact battery performance over time. 
• Maintenance: Keeping the area under the rear seats clean can help the battery's cooling system function properly. 
• Usage: A battery in a vehicle that is driven frequently will likely have its components cycled more often than one that is not driven as regularly.

Signs of a failing hybrid battery
A warning light appears on the dashboard, The car has difficulty starting, The headlights appear dim, and The engine cranks slowly when starting the vehicle.