Home FAQ

What size engine is in the GX470?

The GX470 uses a 4.7-liter V8 engine (engine code 2UZ-FE), delivering roughly 235 horsepower and about 320 lb-ft of torque.

Produced for the U.S. market from 2003 through 2009, the GX470 pairs Lexus’ mid-size SUV platform with a durable Toyota UZ-series V8. The following overview explains the engine’s size, configuration, and performance context to help readers understand what powers this model.

Engine size and configuration

The GX470’s powerplant is a 4.7-liter V8 (engine code 2UZ-FE), a naturally aspirated, 32-valve DOHC design used in GX470 and LX470 models. It is part of Toyota’s UZ family, known for a balance of smooth power and durability.

Before the specifications, it’s helpful to note that the engine’s displacement and layout directly influence the GX470’s on-road manners and off-road capability. The following figures summarize the core specs.

Displacement: 4.7 L (approximately 4,693 cc)

Configuration: V8, naturally aspirated

Engine code: 2UZ-FE

Valvetrain: DOHC, 32-valve

Power output: around 235 hp

Torque: around 320 lb-ft (approximately 433 Nm)

These figures capture the engine’s essential characteristics as used in the GX470 across its production years. Minor variations could occur by market and emission standards, but the 4.7-liter V8 remained the defining powerplant for this model.

Historical context and market positioning

The GX470 debuted in 2003 as Lexus’ mid-size, family-friendly SUV positioned between compact offerings and larger, more rugged trucks. It shared its drivetrain with the LX470, including the 4.7-liter V8, and emphasized a blend of refined on-road manners with credible off-road capability. Production continued through 2009, after which Lexus transitioned to newer generations with updated powertrains.

Notes on variations

Across markets, emissions equipment and tuning occasionally led to small differences in horsepower figures, but the underlying engine family—the 4.7-liter V8 (2UZ-FE)—remained consistent in GX470 and LX470 models.

Summary

In summary, the GX470 is powered by a 4.7-liter V8 engine (2UZ-FE), delivering about 235 horsepower and 320 lb-ft of torque. This powerplant helped define the vehicle’s reputation for durability, smooth highway performance, and solid off-road capability during its 2003–2009 production run.

What engine does the GX 470 have?

The Lexus GX470 is powered by a 4.7-liter, 32-valve, dual-overhead cam V8 engine, code-named the 2UZ-FE. Early models produced 235 horsepower and 320 lb-ft of torque, while a revised version from 2005 onwards saw the horsepower increase to 270 (later revised to 263) and torque to 330 (later revised to 323) lb-ft. This engine is paired with a 5-speed automatic transmission.

You can watch this video to learn more about the engine and its power figures: 58sHakosanYouTube · Apr 7, 2024

Engine code: 2UZ-FE
Engine type: 4.7L V8 with dual-overhead cams
Horsepower:
- 235 hp for early models (2003-2004)
- 270 hp (revised to 263 hp) for 2005 and later models
Torque:
- 320 lb-ft for early models
- 330 lb-ft (revised to 323 lb-ft) for 2005 and later models
Transmission: 5-speed automatic
Engine note: The 2UZ-FE is considered a robust and reliable engine, and in the GX470 it is an interference engine.

This video provides a comprehensive overview of the engine and its performance: 43sAuto Obscure GarageYouTube · Feb 27, 2024

What is the difference between a GX 460 and a GX 470?

The main differences are that the GX 460 is a newer model with a more powerful engine, better fuel efficiency, and a more modern interior, while the GX 470 is generally cheaper, can be easier to modify (especially the suspension), and is considered by some to have a simpler, more reliable build. The GX 460 has a timing chain and standard KDSS, while the GX 470 has a timing belt and optional KDSS, which is a key factor for off-road builds.
This video compares the two vehicles' off-road performance and discusses their pros and cons: 56sTandem OffroadYouTube · Apr 27, 2025

Feature	Lexus GX 460	Lexus GX 470
Engine	4.6L V8 (301 hp) with a timing chain	4.7L V8 (263 hp) with a timing belt
Fuel Efficiency	Better	Less efficient
Suspension	Standard KDSS (Kinetic Dynamic Suspension System) on all models; can be complex to modify	KDSS optional on some models; generally easier to modify
Off-Road Technology	Includes Crawl Control (on some models) and Multi-Terrain Select	Lacks Crawl Control
Interior	More modern, with better infotainment and features like cooled seats on some models	More dated, but some prefer the build quality
Price (Used)	Higher average price	Lower average price
Modifications	More complex for suspension modifications due to standard KDSS	Simpler for suspension modifications

You want the newer vehicle with modern conveniences and technology.
You prioritize better fuel economy.
You want the simplicity of a timing chain engine.
You're not planning on major suspension modifications, or you're willing to tackle the complexity of KDSS.

Choose the GX 470 if:

You are on a tighter budget.
You plan on a significant suspension build for off-roading, as it is generally simpler to work on without KDSS.
You prefer the simpler, more analog nature of the vehicle.
You value the perceived long-term reliability of its engine, despite the timing belt maintenance.

This video demonstrates the off-road capabilities of both the GX 460 and GX 470: 59sDriving Sports TVYouTube · Nov 19, 2021

Is the GX 470 the same as the 4Runner?

No, the Lexus GX470 is not a Toyota 4Runner, but they are closely related, sharing the same platform and a similar powertrain. The GX470 is the luxury version, based on the Toyota Land Cruiser Prado, and is differentiated by its premium interior, standard V8 engine, and full-time four-wheel-drive system, whereas the 4Runner is a more rugged and utilitarian SUV.

This video compares the Lexus GX470 and Toyota 4Runner: 59sMichael TomkoYouTube · Jun 20, 2025
Key differences and similarities
This video highlights the differences between the GX470 and 4Runner: 55sCrutchfield AutomotiveYouTube · Jan 18, 2021

Feature	Lexus GX470	Toyota 4Runner
Branding	Luxury (Lexus)	Mainstream (Toyota)
Platform	Toyota Land Cruiser Prado	Toyota 4Runner platform
Engine	Standard 4.7L V8	Available 4.0L V6 or 4.7L V8
Drivetrain	Standard full-time four-wheel drive	Part-time four-wheel drive in V6 models; full-time in V8 models
Interior	More luxurious, with features like standard heated seats and a standard third row	More utilitarian, with a sliding rear window in most models
Exterior	More refined styling	More rugged and utilitarian styling

What year to avoid Lexus GX470?

The 2003 Lexus GX470 is often cited as the worst model year due to drivetrain issues like clunking noises, and the 2006 model also received a high number of complaints, particularly for drivetrain problems. Other years to be cautious about include models with the optional KDSS system for off-road enthusiasts due to potential costs, and early models (2004 and 2005) for dashboard cracks, dry-rotted wheels, and less engine power compared to later models.
You can watch this video to learn about common problems to look for when buying a Lexus GX470: 52sRob DrivesYouTube · Feb 11, 2021
Specific model years to be cautious about

2003 Lexus GX470: Considered the worst model year by some sources due to specific drivetrain issues, such as clunking and squealing noises, and higher repair costs.
2006 Lexus GX470: Received a high number of owner complaints, particularly regarding drivetrain problems.
Models with KDSS: If you plan to heavily modify the vehicle for off-roading, models with the Kinetic Dynamic Suspension System (KDSS) may be best to avoid due to potential complexity and cost of repairs or modifications.

Common issues across the GX470 lifespan

Drivetrain issues: Reports of clunking and squealing noises have been associated with certain model years.
Dashboard cracks: A common and potentially expensive issue across many model years, especially in warmer climates.
Timing belt and water pump: A crucial maintenance item. The timing belt should be replaced around every 90,000 miles, or the vehicle should have a documented history of this replacement.
Navigation system: The built-in navigation system is outdated and can be difficult to upgrade or repair. Many owners recommend using a smartphone for navigation instead.
Suspension and transmission: During a test drive, listen for unusual noises from the suspension and check for smooth transmission shifts, as these can indicate wear.

This video discusses the maintenance of a Lexus GX470, including the timing belt replacement: 58sCar WizardYouTube · Feb 22, 2022

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.