The Lexus RX 450h, produced between 2009 and 2012, represents the third generation of Lexus’s popular luxury crossover SUV. This variant, equipped with a 3.5-liter V6 hybrid powertrain delivering a combined 299 horsepower and an electronically controlled continuously variable transmission (e-CVT) paired with an E-Four all-wheel-drive system, occupied a premium position within the RX lineup. It was positioned as the flagship model, offering superior fuel efficiency and performance compared to the standard RX 350. The RX III (as it’s often referred to) was built on the Toyota/Lexus XU20 platform, shared with the Toyota Highlander, and aimed to provide a luxurious and technologically advanced driving experience.
Technical Specifications
| Brand | Lexus |
| Model | RX |
| Generation | RX III |
| Type (Engine) | 450h (299 Hp) Hybrid E-Four e-CVT |
| Start of production | 2009 |
| End of production | 2012 |
| Powertrain Architecture | FHEV (Full Hybrid Electric Vehicle) |
| Body type | SUV |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 6.6 l/100 km (35.6 US mpg, 42.8 UK mpg, 15.2 km/l) |
| Fuel consumption (extra urban) | 6 l/100 km (39.2 US mpg, 47.1 UK mpg, 16.7 km/l) |
| Fuel consumption (combined) | 6.3 l/100 km (37.3 US mpg, 44.8 UK mpg, 15.9 km/l) |
| CO2 emissions | 148 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 7.8 sec |
| Acceleration 0 – 62 mph | 7.8 sec |
| Acceleration 0 – 60 mph | 7.4 sec |
| Maximum speed | 200 km/h (124.27 mph) |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 7.1 kg/Hp, 140.4 Hp/tonne |
| Weight-to-torque ratio | 6.7 kg/Nm, 148.8 Nm/tonne |
| Gross battery capacity | 1.9 kWh |
| Battery voltage | 288 V |
| Battery technology | Nickel-metal hydride (NiMH) |
| Battery weight | 69 kg (152.12 lbs) |
| Battery location | Under the rear seats |
| Electric motor power (1) | 167 Hp |
| Electric motor Torque (1) | 335 Nm (247.08 lb.-ft.) |
| Electric motor location (1) | Integrated into the transmission |
| Electric motor type (1) | Synchronous |
| Electric motor power (2) | 68 Hp |
| Electric motor Torque (2) | 139 Nm (102.52 lb.-ft.) |
| Electric motor location (2) | Rear axle, Transverse |
| Electric motor type (2) | Synchronous |
| System power | 299 Hp |
| Power | 249 Hp @ 6000 rpm |
| Torque | 317 Nm @ 4800 rpm (233.81 lb.-ft. @ 4800 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | 2GR-FXE |
| Engine displacement | 3456 cm3 (210.9 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Cylinder Bore | 94 mm (3.7 in.) |
| Piston Stroke | 83 mm (3.27 in.) |
| Compression ratio | 12.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC, VVT-i |
| Engine oil capacity | 6.1 l (6.45 US qt | 5.37 UK qt) |
| Coolant | 11.4 l (12.05 US qt | 10.03 UK qt) |
| Kerb Weight | 2130-2205 kg (4695.85 – 4861.19 lbs) |
| Max. weight | 2700 kg (5952.48 lbs) |
| Max load | 495-570 kg (1091.29 – 1256.63 lbs) |
| Trunk (boot) space – minimum | 446 l (15.75 cu. ft.) |
| Trunk (boot) space – maximum | 1570 l (55.44 cu. ft.) |
| Fuel tank capacity | 65 l (17.17 US gal | 14.3 UK gal) |
| Permitted trailer load with brakes (12%) | 2000 kg (4409.25 lbs) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs) |
| Length | 4770 mm (187.8 in.) |
| Width | 1885 mm (74.21 in.) |
| Height | 1725 mm (67.91 in.) |
| Wheelbase | 2740 mm (107.87 in.) |
| Front track | 1630 mm (64.17 in.) |
| Rear (Back) track | 1620 mm (63.78 in.) |
| Front overhang | 995 mm (39.17 in.) |
| Rear overhang | 1035 mm (40.75 in.) |
| Drag coefficient (Cd) | 0.32 |
| Minimum turning circle | 12.2 m (40.03 ft.) |
| Drivetrain Architecture | ICE drives front wheels, electric motors drive front and rear wheels. Full Hybrid capability. |
| Drive wheel | All wheel drive (4×4) |
| Number of gears | automatic transmission e-CVT |
| Front suspension | Independent, McPherson with coil spring and anti-roll bar |
| Rear suspension | Double wishbone |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Steering type | Steering rack and pinion |
| Power steering | Electric |
| Tires size | 235/60 R18; 235/55 R19 |
| Wheel rims size | 7.5J x 18; 7.5 J x 19 |
INTRODUCTION
The Lexus RX 450h, launched in 2009, was a significant step forward for Lexus in the hybrid SUV segment. Building upon the success of the RX 330 and RX 350, the 450h integrated Lexus’s Hybrid Synergy Drive system, offering a compelling blend of luxury, performance, and fuel efficiency. This generation RX, internally designated as the XU20 series, saw improvements in interior refinement, technology, and overall driving dynamics. The 450h specifically targeted buyers seeking a premium SUV experience with a reduced environmental impact. It was sold primarily in North America, Europe, and parts of Asia.
Powertrain & Engine Architecture
At the heart of the RX 450h lies the 2GR-FXE 3.5-liter V6 gasoline engine. This engine utilizes Toyota’s D-4S direct-injection system, combined with port fuel injection, to optimize combustion efficiency and power delivery. The engine produces 249 horsepower at 6000 rpm and 233.81 lb-ft of torque at 4800 rpm. However, the total system output, when combined with the electric motors, reaches 299 horsepower. The hybrid system employs two electric motor-generators: MG1, which functions as a generator and starter, and MG2, which provides drive power and regenerative braking. The e-CVT (electronically controlled continuously variable transmission) seamlessly integrates the power from both the engine and electric motors, providing smooth and efficient acceleration. The nickel-metal hydride (NiMH) battery pack, located under the rear seats, has a gross capacity of 1.9 kWh and provides a substantial electric-only driving range at lower speeds.
Driving Characteristics
The RX 450h delivers a refined and comfortable driving experience. The e-CVT, while lacking the traditional gear changes of a conventional automatic, provides a linear and responsive power delivery. Acceleration from 0-60 mph takes approximately 7.4 seconds, which is competitive for its class. The hybrid system allows for quiet and efficient operation in electric-only mode at lower speeds, enhancing fuel economy in urban environments. The E-Four all-wheel-drive system provides enhanced traction and stability in various weather conditions. Compared to the RX 350 with a conventional automatic transmission, the 450h offers quicker acceleration and significantly better fuel economy. However, some drivers may find the e-CVT’s lack of distinct gear changes less engaging than a traditional automatic.
Equipment & Trim Levels
The RX 450h was typically well-equipped, even in its base trim. Standard features included leather upholstery, power-adjustable front seats, a premium audio system, navigation system, Bluetooth connectivity, and a rearview camera. Available options included Mark Levinson premium sound, adaptive cruise control, heated and ventilated front seats, and a power rear door. Interior trim levels varied, with options for wood or metallic accents. The dashboard layout was driver-focused, with intuitive controls and a high-quality fit and finish.
Chassis & Braking
The RX 450h features a robust chassis with an independent McPherson strut front suspension and a double-wishbone rear suspension. This setup provides a comfortable ride and predictable handling. Ventilated disc brakes are used on all four wheels, providing ample stopping power. The regenerative braking system captures energy during deceleration, recharging the hybrid battery and further enhancing fuel efficiency. Anti-lock brakes (ABS) and electronic stability control (ESC) are standard safety features.
Market Reception & Comparison
The Lexus RX 450h was generally well-received by automotive critics. It was praised for its fuel efficiency, quiet operation, and luxurious interior. However, some reviewers noted that the e-CVT could feel somewhat disconnected and that the hybrid system added to the vehicle’s weight. Compared to other hybrid SUVs of the time, such as the Toyota Highlander Hybrid, the RX 450h offered a more upscale and refined experience. Its fuel economy, averaging around 37 mpg combined, was a significant advantage over the non-hybrid RX 350.
Legacy
The Lexus RX 450h established Lexus as a leader in the luxury hybrid SUV market. The powertrain proved to be remarkably reliable, with many examples exceeding 200,000 miles with minimal issues. The hybrid battery, while a potential maintenance concern, typically lasts for 10-15 years or more. On the used car market, the RX 450h remains a popular choice for buyers seeking a fuel-efficient and reliable luxury SUV. Its reputation for longevity and low running costs continues to make it a desirable option, even as newer hybrid and electric SUVs enter the market.
