The Good
The 2006 Lexus RX 400h offers smooth, spirited performance with its hybrid powertrain, appealing to those seeking quiet refinement and brisk acceleration. Its legendary Lexus reliability provides practical peace of mind, while the plush, quiet cabin ensures exceptional comfort. The elegant design exudes understated luxury. Excellent fuel efficiency for its class makes it economically appealing, balancing eco-consciousness with daily utility and strong value retention for a luxury SUV.
The Bad
Potential weaknesses for the 2006 Lexus RX 400h include the eventual high-cost replacement of the hybrid battery pack and known failures of the high-voltage inverter. The ABS actuator can also be a source of expensive repairs. While generally reliable, these hybrid-specific components can lead to significant ownership costs, and its infotainment system is quite dated by modern standards.
2006 Lexus RX 400h: Quick Overview
- Engine Options: The 2006 Lexus RX 400h features a sophisticated hybrid powertrain that combines a 3.3-liter Atkinson-cycle V6 gasoline engine with multiple electric motors. Specifically, it utilizes a 3.3-liter V6 engine, a powerful electric motor integrated into the transaxle for the front wheels, and a separate, smaller electric motor to power the rear wheels, effectively creating an on-demand all-wheel-drive (AWD) system. This setup delivers seamless power and impressive efficiency.
- Horsepower: The combined output of the hybrid system is rated at a robust 268 horsepower. This figure represents the maximum net power delivered by the gasoline engine and electric motors working in concert, providing strong acceleration for a mid-size SUV.
- Fuel Economy: EPA estimated fuel economy for the AWD 2006 RX 400h was impressive for its time, achieving approximately 27 miles per gallon in the city, 24 miles per gallon on the highway, and a combined rating of 26 miles per gallon. This efficiency was a major selling point compared to conventional V6 luxury SUVs.
- 0-60 Times: The RX 400h was capable of accelerating from 0 to 60 mph in approximately 7.3 seconds, a respectable time that often surpassed many of its non-hybrid V6 luxury SUV competitors.
- Towing Capacity: When properly equipped with the optional towing package, the 2006 Lexus RX 400h had a towing capacity of up to 3,500 pounds, making it suitable for light-duty towing needs.
- Key Features: The RX 400h was offered with a high level of standard equipment, and additional luxury features were often bundled into packages rather than distinct trims. Standard features typically included dual-zone automatic climate control, power-adjustable leather-trimmed front seats, a premium audio system with a six-disc CD changer, a power tilt/telescoping steering wheel, power liftgate, and 18-inch alloy wheels. Available options and package features included a touchscreen DVD-based navigation system, a Mark Levinson premium sound system, adaptive headlights (AFS), a rear-seat DVD entertainment system, a sunroof, and heated front seats. Safety features like Vehicle Stability Control (VSC), traction control, and a comprehensive airbag system were standard.
2006 Lexus RX 400h Specifications
Vehicle Information
| Year | 2006 |
| Make | Lexus |
| Model | RX 400h |
| Trim | - |
| Style | All-Wheel Drive |
| Type | Sport Utility Vehicle |
| Category | Standard Sport Utility Vehicle |
Manufacturing Details
| Made In | Japan |
| Manufacturing City | MIYAWAKA |
Dimensions
| Doors | 4-Door |
| Curb Weight | 4365 pounds |
| Gross Vehicle Weight Rating | 5520 pounds |
| Overall Height | 68.50 inches |
| Overall Length | 187.20 inches |
| Overall Width | 72.60 inches |
| Wheelbase Length | 106.90 inches |
| Standard Seating | 5 |
Engine & Performance
| Engine | 3.3-L V-6 |
| Engine Size | 3.3L |
| Engine Cylinders | 6 |
| Transmission | Automatic |
| Transmission Type | Automatic |
| Transmission Speeds | Continuously Variable |
| Drivetrain | All-Wheel Drive |
Additional Features
| Anti-Brake System | 4-Wheel ABS |
| Steering Type | Rack & Pinion |
Pricing
| Manufacturer Suggested Retail Price (MSRP) | $46,060 |
| Invoice Price | $40,992 |
| Delivery Charges | $695 |
Vehicle History Report
Specifications
History
Events
History Check
Check
Check
Check
Check
Listings
Recalls
Check
Analysis
What Problems Does the 2006 Lexus RX 400h Have?
Another significant long-term reliability concern is the hybrid battery degradation. Over time and mileage, the nickel-metal hydride (NiMH) battery pack naturally loses capacity, eventually requiring replacement. This can also be a five-figure repair, although reconditioned or aftermarket battery options are available at lower costs. Signs include reduced fuel economy and hybrid system warning lights.
The ABS actuator failure is another notable issue, sometimes affecting the braking system's performance and illuminating dashboard warning lights. This is also an expensive repair due to the complex integration of the braking and regenerative braking systems.
Other less critical but commonly reported problems include issues with the HVAC blower motor, which can become noisy or fail, and various electrical gremlins related to wiring harnesses or sensors, though these are typically minor. Headlight assemblies can also experience fogging or yellowing over time, common for vehicles of this vintage.
Regarding recalls, owners should check the NHTSA database for any specific to the 2006 RX 400h. Historically, second-generation RX models, including the 400h, have had recalls concerning the power window master switch (risk of short circuit and fire), and certain braking system components or fuel pressure sensors. It's crucial to verify if all applicable recalls have been addressed before purchasing a used model. While the conventional gasoline engine and transmission are typically robust, the hybrid-specific systems are the primary points of concern for long-term ownership.
How long will the 2006 Lexus RX 400h last?
However, long-term durability is heavily contingent on the health of the hybrid components. The primary weaknesses over time remain the high-voltage hybrid battery and the inverter. While the rest of the vehicle, including the chassis, interior materials, and electronics (aside from the mentioned ABS actuator), holds up remarkably well, the potential for these expensive hybrid system failures dictates much of the long-term ownership cost and perceived durability. Regular hybrid system checks and preventative maintenance are paramount to maximizing its lifespan.
What Technology & Safety Features are Included?
For entertainment, the RX 400h came standard with a premium Lexus audio system featuring a six-disc in-dash CD changer. An optional and highly regarded Mark Levinson premium sound system was available, delivering exceptional audio quality with more speakers and a higher wattage amplifier. A rear-seat DVD entertainment system was also an option, providing a flip-down screen for passenger enjoyment.
Driver-assistance features were foundational rather than advanced. Standard systems included Anti-lock Braking System (ABS), Electronic Brake-force Distribution (EBD), Brake Assist (BA), Vehicle Stability Control (VSC), and Traction Control (TRAC). An Adaptive Front Lighting System (AFS) was an available option, which swiveled the headlights in the direction of a turn to improve visibility. Modern driver-assist technologies like adaptive cruise control, lane-keeping assist, or blind-spot monitoring were not available on this model.
In terms of safety features, the RX 400h was well-equipped. It included dual-stage front airbags, front seat-mounted side airbags, side curtain airbags for both rows, and a driver's knee airbag. LATCH (Lower Anchors and Tethers for Children) child seat anchors were standard. A Tire Pressure Monitoring System (TPMS) was also included.
Regarding crash-test ratings, the 2006 Lexus RX 400h performed commendably. The National Highway Traffic Safety Administration (NHTSA) awarded it 5 stars for frontal driver and passenger crash protection, 5 stars for front and rear side-impact protection, and 4 stars for rollover resistance. The Insurance Institute for Highway Safety (IIHS) gave it "Good" ratings for moderate overlap front, side impact, and roof strength tests, contributing to its reputation as a safe family vehicle.
What Colors Options are Available?
2006 Lexus RX 400h Prices and Market Value
The vehicle has experienced substantial depreciation from its new price, which is common for luxury vehicles and particularly for older hybrids due to concerns about the lifespan and replacement cost of the hybrid battery and inverter. Factors significantly affecting resale value include the overall mechanical condition, the operational status and health of the hybrid system (often a critical inspection point for buyers), documented service records, and the vehicle's cosmetic appearance. High mileage and neglected maintenance drastically reduce its value.
2006 Lexus RX 400h Cost of Ownership
2006 Lexus RX 400h Fuel Efficiency
2006 Lexus RX 400h Safety Rating
NHTSA
IIHS
2006 Lexus RX 400h Warranty
Basic
Powertrain
Rust
2006 Lexus RX 400h Insurance
reasonable repair costs.
How Does the 2006 Lexus RX 400h Compare to Other Sport Utility Vehicle?
In terms of performance, the RX 400h offered a smooth, refined, and surprisingly brisk acceleration (0-60 mph in about 7.3 seconds) that often outpaced base V6 versions of its rivals. Its hybrid system delivered immediate torque, enhancing urban driving. While the BMW X5 and Mercedes-Benz ML-Class offered more powerful V8 options and sportier handling, the RX 400h prioritized comfort and efficiency.
Features were competitive; the RX 400h provided standard luxury amenities like leather, power seats, and a premium sound system, with options for navigation and Mark Levinson audio comparable to its rivals. However, European competitors sometimes offered more advanced suspension systems or unique luxury touches.
Reliability was a strong suit for the RX 400h, building on Lexus's stellar reputation. It generally surpassed the long-term reliability of European rivals like the BMW X5 and Mercedes-Benz ML-Class from the same era, which were often plagued by more frequent and costly electrical and mechanical issues. The Acura MDX was its closest competitor in terms of overall reliability, though it lacked the hybrid efficiency.
Regarding price, the RX 400h was competitively priced new against its luxury counterparts. On the used market today, its price can be a double-edged sword: a potential bargain due to depreciation, but with the caveat of costly potential hybrid component repairs.
For those considering alternatives, if a hybrid is desired, newer models like the Lexus RX 450h (2010+) offer updated technology, more power, and refined hybrid systems, albeit at a higher used price. For a less luxurious but mechanically similar and reliable hybrid SUV, the Toyota Highlander Hybrid of the same era shares much of the RX 400h's powertrain technology. If hybrid complexity is a concern, a non-hybrid Lexus RX 350 (2007+) provides similar comfort and reliability without the specific hybrid component risks, and is often a safer used buy for long-term ownership. For better handling, a used Acura MDX from the same period is a strong alternative.
Final Verdict: Is the 2006 Lexus RX 400h a Good Sport Utility Vehicle?
Is it worth buying? Yes, but with significant caution. A pre-purchase inspection (PPI) by a specialist familiar with Lexus hybrid systems is absolutely essential to assess the health of the hybrid battery and, crucially, the inverter. Look for examples with comprehensive service records. If these major hybrid components are sound, or have recently been replaced, the RX 400h can be a fantastic value, offering luxury and efficiency at a low used price. Avoid models with no service history or hybrid system warning lights unless you're prepared for potentially massive repair bills.