2014-2017 Lexus NX I (AZ10) 300h (197 Hp) Hybrid e-CVT

The Lexus NX 300h, part of the first-generation NX (AZ10) series produced between October 2014 and November 2017, represented Lexus’s entry into the burgeoning compact luxury crossover segment with a strong emphasis on hybrid technology. This variant, powered by a 2.5-liter four-cylinder engine paired with an electric motor and utilizing a continuously variable transmission (e-CVT), aimed to deliver a balance of fuel efficiency, refined driving experience, and Lexus’s signature luxury. The 300h trim sat as the primary hybrid offering within the NX lineup, positioned above the base NX 200 and alongside the performance-oriented NX 200t (later NX 300). It was primarily marketed towards buyers seeking a premium crossover with low running costs and a reduced environmental impact, particularly in markets where fuel prices were high and hybrid technology was well-received.

Technical Specifications

Powertrain & Engine Architecture

The heart of the NX 300h is the 2AR-FXE 2.5-liter inline-four engine. This engine utilizes the Atkinson cycle, known for its increased efficiency at the expense of some peak power. It features multi-port fuel injection and a double overhead camshaft (DOHC) valvetrain. The engine produces 155 horsepower and 154.89 lb-ft of torque. Crucially, this engine doesn’t operate in isolation. It’s integrated with Lexus’s Hybrid Synergy Drive system. This system combines the output of the 2.5L engine with two electric motor/generators (MG1 and MG2). MG1 primarily functions as a generator and starter, while MG2 provides drive power and regenerative braking. The e-CVT, a key component of the system, isn’t a traditional continuously variable transmission with belts and pulleys. Instead, it’s a power-split device that seamlessly blends the power from the engine and electric motors, providing a smooth and stepless acceleration experience. The battery, a 244.8V Nickel-metal hydride (NiMH) pack, is located under the rear seats, minimizing intrusion into passenger or cargo space.

Driving Characteristics

The NX 300h with the e-CVT delivers a distinctly different driving experience compared to the gasoline-only NX 200t. Acceleration is smooth and linear, though not particularly brisk, with a 0-60 mph time of around 8.7 seconds. The e-CVT prioritizes efficiency over outright performance, meaning the engine speed often remains relatively constant during acceleration, creating a somewhat unusual engine note. In typical driving scenarios, the hybrid system seamlessly switches between electric-only, engine-only, and combined operation. The electric motors provide instant torque, which helps with initial acceleration and provides a quiet and refined driving experience at lower speeds. The regenerative braking system effectively captures energy during deceleration, further enhancing fuel economy. Compared to the more powerful NX 200t, the 300h feels less responsive, but its superior fuel economy and quieter operation make it a compelling choice for drivers prioritizing comfort and efficiency.

Equipment & Trim Levels

The NX 300h typically came well-equipped, reflecting Lexus’s luxury positioning. Standard features generally included leather upholstery, power-adjustable front seats, a rearview camera, a 7-inch infotainment display, Bluetooth connectivity, and a suite of safety features like pre-collision system, lane departure alert, and adaptive cruise control. Higher trim levels added features such as a larger 10.3-inch infotainment screen, navigation, premium audio systems (Mark Levinson), blind-spot monitoring, rear cross-traffic alert, and a power rear liftgate. Optional extras included heated and ventilated front seats, a panoramic sunroof, and various cosmetic enhancements.

Chassis & Braking

The NX 300h utilizes a front-wheel-drive layout as standard, with all-wheel drive available as an option. The suspension consists of independent MacPherson struts at the front and a double wishbone setup at the rear, providing a comfortable and controlled ride. The braking system features ventilated discs at the front and solid discs at the rear, coupled with ABS, electronic brake-force distribution, and brake assist. The steering is an electric power-assisted rack-and-pinion system, offering a light and precise feel.

Market Reception & Comparison

The Lexus NX 300h was generally well-received by critics, who praised its fuel efficiency, comfortable ride, and quiet cabin. However, some reviewers noted its relatively modest acceleration and the somewhat unconventional driving experience of the e-CVT. Compared to the NX 200t, the 300h offered significantly better fuel economy (around 46 mpg combined) but less performance. Against competitors like the Acura RDX and BMW X3, the NX 300h stood out for its hybrid powertrain and Lexus’s reputation for reliability. Its fuel economy was a key selling point, particularly in markets with high gasoline prices.

Legacy

The first-generation Lexus NX 300h has proven to be a reliable and durable vehicle. The Hybrid Synergy Drive system is known for its longevity, and many examples have exceeded 150,000 miles with minimal issues. On the used car market, the NX 300h remains a popular choice for buyers seeking a fuel-efficient and well-equipped luxury crossover. While the battery pack may eventually require replacement (typically after 10-15 years), the overall cost of ownership remains competitive due to the vehicle’s excellent fuel economy and Lexus’s strong reputation for build quality.