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2009 Lexus GX470

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By Research the Car 2 min read

2009 Lexus GX470

Overview

The 2009 Lexus GX470 is a luxury SUV known for its robust build quality and off-road capability, largely inherited from its Toyota Land Cruiser Prado underpinnings. It typically features a powerful V8 engine, a sophisticated four-wheel-drive system, and a comfortable, well-appointed interior. Reliability is generally a strong suit for this model, with many owners reporting few significant mechanical problems outside of routine maintenance. However, like any vehicle of its age, certain components may show wear or develop specific issues over time. This analysis focuses on documented, non-wear-and-tear related problems.

Engine

4.7L V8 (2UZ-FE)

Timing Belt Replacement

  • Symptoms: While a scheduled maintenance item, failure to replace the timing belt at recommended intervals (typically 90,000 miles) can lead to catastrophic engine damage.
  • Solution: Replace timing belt, water pump, tensioners, and idler pulleys as a kit.
  • Cost: $800 - $1500

Oil Leaks (Valve Covers/Rear Main Seal)

  • Symptoms: Visible oil drips under the vehicle, oil smell, low oil level.
  • Solution: Replace leaking gaskets (valve cover gaskets, rear main seal).
  • Cost: $300 - $700 (Valve Covers), $700 - $1200 (Rear Main Seal)

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)

Hydraulic Leaks/Pump Failure

  • Symptoms: Stiff steering, uneven ride height, clunking noises, warning lights.
  • Solution: Repair or replace leaking hydraulic lines, seals, or the KDSS pump.
  • Cost: $500 - $1500

Adjustable Height Rear Air Suspension

Air Spring Leaks/Compressor Failure

  • Symptoms: Vehicle sagging in the rear, loss of adjustable ride height, compressor running excessively.
  • Solution: Replace leaking air springs or the air compressor unit.
  • Cost: $400 - $800 (per spring), $500 - $1000 (compressor)

Electrical

Body Control Module (BCM)

Intermittent Electrical Gremlins

  • Symptoms: Various non-critical electrical systems malfunctioning (e.g., power windows, interior lights, dashboard warnings).
  • Solution: Diagnosis and potential reprogramming or replacement of the BCM.
  • Cost: $500 - $1000

Screen/Unit Malfunction

  • Symptoms: Screen freezing, not powering on, or display issues.
  • Solution: Repair or replacement of the navigation unit.
  • Cost: $400 - $1000

Exterior

Body Panels & Trim

No widespread issues reported.

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

Interior

Leather Upholstery

No widespread issues reported.

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

Heated Seats

Heating Element Failure

  • Symptoms: One or both heated seats not warming.
  • Solution: Replacement of the heating element or seat module.
  • Cost: $300 - $600

Summary Verdict

The 2009 Lexus GX470 is a highly reliable vehicle, particularly concerning its core powertrain. The 4.7L V8 engine and 5-speed automatic transmission are known for their durability. Potential issues tend to be concentrated in the more complex suspension systems (KDSS and air suspension), which, while generally robust, can develop leaks or component failures over time due to age and mileage. Electrical quirks, especially with the navigation system or BCM, are also noted but not universally reported. Overall, the GX470 offers excellent long-term reliability, with most repairs stemming from age-related wear on specialized systems rather than inherent design flaws.

Lexus, GX470
Lexus GX470 2009
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