The 2004 Lexus GX (GX 470) is a midsize luxury SUV built on a rugged, body-on-frame platform shared with the Toyota Land Cruiser Prado, blending premium comfort with real off-road capability. It’s ideal for buyers who want a quiet, upscale daily driver that can also tow, handle poor roads, and rack up high mileage when maintained properly. As part of the first-generation GX (2003–2009), the 2004 model sits early in the run and delivers classic Lexus refinement with proven Toyota truck-based durability. In the market, it competes with SUVs like the Acura MDX, Land Rover Discovery, and Mercedes-Benz M-Class, but stands out for long-term reliability and trail-ready hardware.

1) 4.7L V8 power: The GX 470 uses a 4.7-liter V8 (2UZ-FE) paired with a 5-speed automatic transmission, known for smooth torque delivery and long service life with regular maintenance. 2) Full-time 4WD with low range: Standard full-time four-wheel drive includes a 2-speed transfer case and low-range gearing for snow, steep grades, and off-road use. 3) Strong towing and utility: With its V8 and truck-based chassis, the 2004 GX is a confident tow vehicle for boats and small trailers when equipped properly and maintained (cooling system and brakes matter). 4) Optional rear air suspension: Many 2004 GX models were equipped with rear height-adjustable air suspension for load leveling and ride comfort, a premium feature but one that can require attention as the vehicle ages. 5) Quiet luxury cabin: Lexus-grade sound insulation, comfortable seating, and a refined ride make it a top pick for long highway trips compared with many body-on-frame SUVs.

Shoppers researching 2004 Lexus GX reliability will find the GX 470 is generally durable, but there are a few common problem areas that show up with age and mileage. 1) Exhaust manifold cracks and ticking noise: A common 2004 Lexus GX problem is cracked exhaust manifolds, often noticed as a ticking sound on cold start. This can show up around 100,000–180,000 miles and may trigger exhaust leaks and related sensor issues if ignored. 2) Rear air suspension leaks (if equipped): The rear air bags can leak or the compressor can weaken over time, causing sagging, an uneven stance, or warning lights. Failures are often reported around 120,000–200,000 miles depending on climate and load use. Some owners repair the system; others convert to conventional coils. 3) Brake actuator/booster concerns: Some owners report ABS/VSC lights, a firm pedal, or abnormal brake actuator pump operation. While not every GX is affected, it’s a known complaint area on aging Toyota/Lexus trucks and can be costly if replacement is needed. 4) Driveline vibrations and wear items: U-joints, driveshaft slip yokes, and worn suspension bushings can cause clunks or vibrations, especially in higher-mileage vehicles. These typically show up after 150,000 miles, particularly on SUVs that tow or see off-road use.