The Lexus TX 550h V6 (404 Hp) Plug-in Hybrid DIRECT4 e-CVT, launched in October 2023, represents Lexus’s entry into the three-row luxury SUV segment with a focus on hybrid efficiency and technology. Positioned as a premium offering within the TX lineup, it sits at the top in terms of powertrain complexity and performance. The TX series, built on a stretched version of the Toyota Grand Highlander platform, aims to provide a more spacious and refined alternative to the RX, catering to families and buyers seeking a blend of luxury, practicality, and fuel economy. This particular variant utilizes Lexus’s DIRECT4 all-wheel-drive system and a sophisticated plug-in hybrid powertrain to deliver both strong performance and reduced emissions.
Technical Specifications
| Brand | Lexus |
| Model | TX |
| Generation | TX |
| Type (Engine) | 550h V6 (404 Hp) Plug-in Hybrid DIRECT4 e-CVT |
| Start of production | October, 2023 |
| Powertrain Architecture | PHEV (Plug-in Hybrid Electric Vehicle) |
| Body type | SUV |
| Seats | 6 |
| Doors | 5 |
| Fuel consumption (economy) – urban | 8.1 l/100 km (29 US mpg, 34.9 UK mpg, 12.3 km/l) |
| Fuel consumption (economy) – extra urban | 8.4 l/100 km (28 US mpg, 33.6 UK mpg, 11.9 km/l) |
| Fuel consumption (economy) – combined | 8.1 l/100 km (29 US mpg, 34.9 UK mpg, 12.3 km/l) |
| Fuel Type | Petrol / electricity |
| Acceleration 0 – 60 mph | 5.9 sec |
| Maximum speed | 180 km/h (111.85 mph), Electronically limited |
| Emission standard | SULEV |
| Weight-to-power ratio | 6 kg/Hp, 166.3 Hp/tonne |
| Weight-to-torque ratio | 7.3 kg/Nm, 137.9 Nm/tonne |
| Gross battery capacity | 18.1 kWh |
| Battery voltage | 355.2 V |
| Battery technology | Lithium-ion (Li-Ion) |
| Battery location | Below the floor |
| All-electric range | 53.1 km (32.99 mi) |
| Electric motor power (1) | 179 Hp |
| Electric motor Torque (1) | 270 Nm @ 4600 rpm (199.14 lb.-ft. @ 4600 rpm) |
| Electric motor location (1) | Integrated into the transmission |
| Electric motor type (1) | Synchronous |
| Electric motor power (2) | 101 Hp |
| Electric motor Torque (2) | 168 Nm @ 4600 rpm (123.91 lb.-ft. @ 4600 rpm) |
| Electric motor location (2) | Rear axle, Transverse |
| Electric motor type (2) | Synchronous |
| System power | 404 Hp |
| Power | 259 Hp @ 6000 rpm |
| Power per litre | 74.9 Hp/l |
| Torque | 335 Nm @ 4600 rpm (247.08 lb.-ft. @ 4600 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | 2GR-FXS |
| 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 | 13:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection and Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC |
| Engine oil capacity | 5.5 l (5.81 US qt | 4.84 UK qt) |
| Kerb Weight | 2430-2449 kg (5357.23 – 5399.12 lbs.) |
| Max. weight | 2966 kg (6538.91 lbs.) |
| Max load | 517-536 kg (1139.79 – 1181.68 lbs.) |
| Trunk (boot) space – minimum | 572 l (20.2 cu. ft.) |
| Trunk (boot) space – maximum | 2747 l (97.01 cu. ft.) |
| Fuel tank capacity | 55 l (14.53 US gal | 12.1 UK gal) |
| Permitted trailer load with brakes (12%) | 2268 kg (5000.08 lbs.) |
| Length | 5160 mm (203.15 in.) |
| Width | 1990 mm (78.35 in.) |
| Height | 1780 mm (70.08 in.) |
| Wheelbase | 2950 mm (116.14 in.) |
| Front track | 1713 mm (67.44 in.) |
| Rear (Back) track | 1721 mm (67.76 in.) |
| Front overhang | 1050 mm (41.34 in.) |
| Rear overhang | 1160 mm (45.67 in.) |
| Ride height (ground clearance) | 196 mm (7.72 in.) |
| Drag coefficient (Cd) | 0.35 |
| Minimum turning circle (turning diameter) | 11.6 m (38.06 ft.) |
| Front suspension | Independent, type McPherson with coil spring and anti-roll bar |
| Rear suspension | Independent multi-link spring suspension with stabilizer |
| Front brakes | Ventilated discs, 399 mm |
| Rear brakes | Ventilated discs, 338 mm |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Wheel rims size | 22 |
Powertrain & Engine Architecture
The TX 550h V6 utilizes a 3.5-liter naturally aspirated V6 engine (2GR-FXS) paired with a plug-in hybrid system. The engine itself features direct and port fuel injection, contributing to both efficiency and performance. The hybrid system incorporates two electric motors – one integrated with the front-mounted e-CVT and another driving the rear axle. This configuration enables Lexus’s DIRECT4 all-wheel-drive system, which intelligently distributes torque between the front and rear axles for optimal traction and handling. The e-CVT (electronic Continuously Variable Transmission) is a key component, providing seamless power delivery and contributing to fuel efficiency. The 18.1 kWh lithium-ion battery pack is located under the floor, minimizing impact on passenger space. The combined system output of 404 horsepower allows for brisk acceleration, while the electric motors provide instant torque.
Driving Characteristics
The TX 550h V6 offers a refined and comfortable driving experience. The electric motors provide near-silent operation in EV mode, making for a serene commute. In hybrid mode, the transition between electric and gasoline power is virtually seamless. The DIRECT4 system provides confident all-wheel-drive grip in various conditions. While not a sports SUV, the 5.9-second 0-60 mph acceleration is respectable for its size and class. The e-CVT, while efficient, lacks the traditional gear changes of a conventional automatic, which some drivers may find less engaging. Compared to non-hybrid TX models, the 550h offers significantly improved fuel economy and a more responsive low-end torque feel due to the electric motor assistance.
Equipment & Trim Levels
The TX 550h V6 comes standard with a high level of equipment, befitting its premium positioning. Standard features typically include leather upholstery, heated and ventilated front seats, a large touchscreen infotainment system with wireless Apple CarPlay and Android Auto compatibility, a premium sound system, and a comprehensive suite of advanced driver-assistance systems (ADAS) such as adaptive cruise control, lane-keeping assist, and automatic emergency braking. Optional extras may include a panoramic sunroof, upgraded interior trim, and a rear-seat entertainment system. Trim levels beyond the base model often add cosmetic enhancements and additional convenience features.
Chassis & Braking
The TX 550h V6 features an independent suspension system – McPherson struts at the front and a multi-link setup at the rear – tuned for a balance of comfort and handling. Stabilizer bars are included at both ends to reduce body roll. Braking duties are handled by ventilated disc brakes on all four wheels, providing ample stopping power. The electronic braking system integrates with the hybrid system for regenerative braking, capturing energy during deceleration and returning it to the battery. The suspension is tuned to accommodate the added weight of the battery pack without compromising ride quality.
Market Reception & Comparison
The Lexus TX 550h V6 has been generally well-received by critics, praised for its spacious interior, comfortable ride, and fuel-efficient powertrain. Compared to other plug-in hybrid SUVs in its class, such as the Volvo XC90 Recharge and the BMW X5 xDrive50e, the TX 550h offers a competitive combination of features, performance, and price. Some reviewers have noted that the infotainment system, while improved, could be more intuitive. The TX’s focus on comfort and refinement sets it apart from more performance-oriented rivals.
Legacy
As a relatively new model, the long-term reliability of the TX 550h V6 remains to be fully established. However, Lexus has a strong reputation for reliability, and the powertrain components are based on proven technology. The hybrid system is expected to provide years of dependable service, and the battery pack is covered by a comprehensive warranty. On the used car market, the TX 550h V6 is likely to hold its value well due to its desirable features, fuel efficiency, and the Lexus brand’s reputation. The combination of a V6 engine, plug-in hybrid technology, and all-wheel drive is expected to appeal to a wide range of buyers seeking a versatile and efficient luxury SUV.
