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Lexus Gx 470

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Lexus GX 470: A Comprehensive Guide

The Lexus GX 470 is a mid-size luxury SUV that seamlessly blends on-road comfort with off-road capability. Introduced in 2002 as a 2003 model, it filled a niche in the Lexus lineup, offering a more rugged and truck-based alternative to the car-based RX series. The GX 470 quickly gained popularity for its luxurious appointments, smooth ride, and surprising competence on challenging terrain. Its lineage traces back to the Toyota Land Cruiser Prado, ensuring a robust and reliable foundation.

Generations

First Generation (2003-2009)

The GX 470 only saw one generation during its production run. However, there were some notable updates throughout its life cycle.

  • 2003: Initial launch with the 4.7L V8 engine (2UZ-FE), full-time 4WD, and adjustable height suspension (AHC).
  • 2005: Minor cosmetic updates including redesigned taillights, a new grille, and updated wheels. Interior enhancements included improved wood trim and available Bluetooth.
  • 2007: Significant updates including a horsepower increase from 235 to 263 hp due to variable valve timing (VVT-i), revised transmission with more gears and resulting MPG improvement, and a new instrument cluster. Also received side curtain airbags.
  • 2008: Addition of standard safety features like Vehicle Stability Control (VSC) and Traction Control (TRAC).
  • 2009: Last year of production for the GX 470. No significant changes.

Reliability & Common Issues

The Lexus GX 470 enjoys a reputation for above-average reliability, largely inherited from its Toyota Land Cruiser Prado underpinnings. However, like any vehicle, it has its share of potential issues, some more prevalent than others. Addressing these proactively can significantly extend the vehicle's lifespan and maintain its value.

  • Rust: Vehicles in regions with heavy road salt usage are prone to rust, especially on the frame and undercarriage. Thorough inspection, especially of the frame rails and suspension components, is crucial. Applying a rust inhibitor can mitigate this issue.
  • Air Suspension (AHC): The Adjustable Height Control system, while offering a smooth ride and leveling capabilities, can be a source of expense. Airbags can leak over time, and the compressor can fail. Listen for the compressor running frequently or for a noticeable sag in ride height. Aftermarket replacement with coil springs is a common and reliable (though less luxurious) alternative.
  • Timing Belt: The 2UZ-FE engine is an interference engine, meaning that valve damage can occur if the timing belt breaks. The timing belt needs replacement every 90,000 miles, and neglecting this can lead to catastrophic engine damage. Check service records or proactively replace if unsure. Also, it's recommended to replace the water pump at the same time since everything is already disassembled.
  • Cooling System: Radiator leaks can occur, especially in older models. Inspect the radiator for cracks or signs of coolant leakage. Regular coolant flushes are essential to prevent corrosion.
  • Secondary Air Injection System: This system helps reduce emissions during cold starts. The pump and valves can fail, leading to a check engine light. While not affecting driveability, repairs can be costly. Bypassing the system with aftermarket kits is possible, but may not be emissions-compliant in all regions.
  • Dashboard Cracking: A common issue with many Lexus vehicles of this era, the dashboard can develop cracks, especially in sun-exposed areas. This is primarily cosmetic, but detracts from the vehicle's overall appearance. Dashboard covers are a common solution.
  • Valve Cover Gaskets: Oil leaks from the valve cover gaskets are relatively common as the vehicle ages. This is typically a straightforward repair.
  • Front Lower Ball Joints: These ball joints are known to wear out and require replacement. Check for play in the front suspension and any unusual noises.

Driving Experience

The Lexus GX 470 offers a driving experience that prioritizes comfort and capability over outright sportiness. It's a capable off-roader and a comfortable daily driver, though not particularly nimble on the road.

Pros:

  • Smooth Ride: The AHC (if functioning correctly) provides a plush and comfortable ride, absorbing bumps and imperfections in the road.
  • Off-Road Capability: Full-time 4WD, low range, and electronic aids make the GX 470 surprisingly capable off-road.
  • Reliable Engine: The 2UZ-FE V8 is known for its durability and longevity.
  • Luxurious Interior: High-quality materials and comfortable seating provide a premium feel.
  • Quiet Cabin: Excellent sound insulation contributes to a relaxed driving environment.
  • Towing Capacity: Capable of towing up to 6,500 lbs, making it suitable for hauling trailers or boats.

Cons:

  • Fuel Economy: Fuel economy is poor, even by SUV standards, typically averaging around 14-16 mpg.
  • Handling: The body-on-frame construction and high center of gravity result in noticeable body roll in corners. It is not a particularly sporty vehicle.
  • AHC Maintenance: The air suspension system can be costly to maintain or repair.
  • Dated Technology: The technology features, while adequate for their time, are outdated compared to modern vehicles.
  • Turning Radius: The turning radius is not the best, making maneuvering in tight spaces challenging.

Buying Advice

When considering a used Lexus GX 470, here's what to look for and what to avoid:

Years to Look For:

  • 2007-2009: These models offer the updated 4.7L V8 with increased horsepower and variable valve timing (VVT-i), a more modern 5-speed automatic transmission, and improved safety features. The 2007+ models are generally considered the most desirable.
  • 2005-2006: While not as powerful as the later models, these years offer a good balance of price and features. Ensure the timing belt has been replaced.

Years to Potentially Avoid (or Inspect Carefully):

  • 2003-2004: These are the oldest models and may have accumulated significant mileage and wear. Pay close attention to the condition of the AHC system, rust, and timing belt replacement.

Key Inspection Points:

  • Rust: Thoroughly inspect the frame, undercarriage, and body panels for rust, especially in areas prone to road salt exposure.
  • AHC System: Test the air suspension system by raising and lowering the vehicle. Listen for the compressor running excessively or any sagging. Consider the cost of potential repairs.
  • Timing Belt: Verify that the timing belt has been replaced at the recommended interval (every 90,000 miles). If no proof exists, factor in the cost of replacement.
  • Fluid Leaks: Check for oil leaks around the engine, transmission, and differentials.
  • Service Records: Review the vehicle's service history for evidence of regular maintenance and any major repairs.
  • 4WD System: Test the 4WD system to ensure it engages and disengages smoothly.
  • Overall Condition: Assess the overall condition of the interior and exterior. Look for signs of neglect or abuse.

A pre-purchase inspection by a qualified mechanic is highly recommended. A GX 470 in good condition, properly maintained, and with documented service history can provide years of reliable service and enjoyable ownership. Don't be afraid to walk away from a deal if you find evidence of significant rust, neglected maintenance, or a problematic AHC system.

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