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2006 Lexus GX470

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By Research the Car 3 min read

2006 Lexus GX470

Overview

The 2006 Lexus GX470 is a luxury mid-size SUV known for its robust build quality and off-road capability, largely due to its body-on-frame construction and sophisticated Kinetic Dynamic Suspension System (KDSS). It shares its platform with the Toyota Land Cruiser Prado, inheriting much of its legendary reliability. Powered by a potent V8 engine, it offers strong performance for both on-road cruising and towing. While generally a very dependable vehicle, like any complex machine, it can experience specific issues as it ages, particularly related to its advanced systems and components. This analysis focuses on documented common problems beyond routine maintenance.

Engine

4.7L V8 (2UZ-FE)

Timing Belt Replacement

  • Symptoms: While not a failure, this is a critical maintenance item. Neglecting it can lead to catastrophic engine damage.
  • Solution: Scheduled replacement at recommended intervals (typically 90,000 miles).
  • Cost: $600 - $1000

Oil Leaks (Valve Covers, Oil Cooler Lines)

  • Symptoms: Visible oil drips under the vehicle, burning oil smell, low oil level.
  • Solution: Replacement of leaking gaskets or hoses.
  • Cost: $200 - $600

Exhaust Manifold Cracks

  • Symptoms: Ticking noise on startup, especially when cold; exhaust smell in the cabin.
  • Solution: Replacement of cracked exhaust manifold(s).
  • Cost: $400 - $800 per manifold

Transmission

5-Speed Automatic (A750F)

No widespread issues reported.

  • Symptoms: No widespread issues reported.
  • Solution: No widespread issues reported.
  • Cost: No widespread issues reported.

Suspension

Kinetic Dynamic Suspension System (KDSS)

Leaking KDSS Lines/Actuators

  • Symptoms: Stiff ride, clunking noises over bumps, warning lights on the dashboard related to suspension.
  • Solution: Replacement of leaking hydraulic lines or actuators.
  • Cost: $500 - $1500

Adjustable Height Control (AHC) System

Pump Failure / Leaks

  • Symptoms: Vehicle not maintaining ride height, suspension warning lights, audible pump noise.
  • Solution: Repair or replacement of the AHC pump or associated lines.
  • Cost: $800 - $2000

Electrical

Body Control Module (BCM)

Intermittent Electrical Gremlins

  • Symptoms: Various electrical components malfunctioning intermittently (e.g., power windows, locks, interior lights, dashboard lights).
  • Solution: Diagnosis and potential reprogramming or replacement of the BCM.
  • Cost: $500 - $1200

Screen Issues / Freezing

  • Symptoms: Touchscreen unresponsive, display freezing, unit not powering on.
  • Solution: Software update or replacement of the navigation unit.
  • Cost: $400 - $1000

Exterior

Tailgate Actuator

Failure to Open/Close

  • Symptoms: Power tailgate mechanism fails to operate, manual release may be required.
  • Solution: Replacement of the tailgate actuator motor.
  • Cost: $300 - $600

Headlight Condensation

Moisture Inside Headlights

  • Symptoms: Visible condensation or fogging inside the headlight assemblies.
  • Solution: Sealing the headlight assembly or replacement.
  • Cost: $100 - $500 per headlight

Interior

Heated Seat Elements

Failure of Heating Elements

  • Symptoms: One or both heated seats no longer produce heat.
  • Solution: Replacement of the seat heating element.
  • Cost: $200 - $500 per seat

Sunroof Motor

Sunroof Not Operating

  • Symptoms: Sunroof fails to open, close, or tilt.
  • Solution: Replacement of the sunroof motor.
  • Cost: $300 - $700

Summary Verdict

The 2006 Lexus GX470 is a highly reliable SUV, benefiting from Toyota’s robust engineering and the proven 4.7L V8 engine. Most reported issues are related to age and mileage, particularly concerning the advanced suspension systems (KDSS and AHC) and some electrical components. Routine maintenance, especially the timing belt replacement, is crucial for long-term durability. While repairs can sometimes be costly due to specialized systems, the overall dependability and longevity of the GX470 make it a strong contender in the used luxury SUV market. Addressing potential issues proactively can ensure many more years of service.

Lexus, GX470
Lexus GX470 2006
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