[Toyota 120 Home] [Forum] [4Runner] [Tacoma] [FJ Cruiser] [Lexus GX470] [LC Prado 120] [Tech Write Ups]

2003 Model GX470

Lexus introduced their first true midsize SUV for 2003. It was based of the same platform as the Toyota 4Runner in the US and Toyota Prado 120 in the overseas market. The body styling of the GX and Prado are very similar in many aspects, with rear barn door and higher roof line. There are a number of differences like the front bumper, headlights, etc.

The Lexus GX470 only came with the 4.7 V8 also found in the Land Cruiser and 4Runner, it also came with the new A750E 5 speed auto transmission. It was also only available with the adjustable rear air suspension and adjustable shocks.

The interior was a significant upgrade from the 4Runner both in terms of materials and size.

Some of the key specifications:

 

2003 Lexus GX 470

GENERAL

Location of final assembly

Tahara, Japan

Body style

4-door SUV

EPA size class

Special purpose

Drivetrain layout

Front engine/4WD

Airbags

Front/side/curtain

POWERTRAIN

Engine type

4.7L V-8 cast-iron block, alum head

Bore x stroke, in

3.70x3.31

Displacement, cu in/L

285/4.7

Compression ratio

9.6:1

Valve gear

DOHC, 4 valves/cyl VVT

Fuel induction

SFI

SAE horsepower, hp @ rpm

235 @ 4800

SAE torque, lb-ft @ rpm

320 @ 3400

Transmission type

A750F 5-speed auto

1st

3.52:1

2nd

2.04:1

3rd

1.40:1

4th

1.00:1

5th

0.72:1

Reverse

3.20:1

Axle ratio

3.73:1

Final-drive ratio

2.69:1

Transfer-case model

VF4BM

Low-range ratio

2.57:1

Crawl ratio

(1st x axle x low range) 33.7:1

Recommended fuel

Unleaded premium

EPA fuel economy (city/hwy)

15/18

DIMENSIONS

Wheelbase, in

109.8

Length, in

188.2

Width, in

74.0

Height, in

73.0

Track, f/r, in

62.2/62.2

Headroom, f/m/r, in

41.0/40.4/36.1

Legroom, f/m/r, in

41.8/36.8/24.9

Shoulder room, f/m/r, in

57.5/57.4/56.8

Cargo-area volume, cu ft

112.3

3rd row, seat up

13.2

3rd row, seat folded/removed

39.8/49.7

Back-row seat down

77.5

Ground clearance, in

8.3

Approach/departure angle (normal/high)

31°/25°

Base curb weight, lb

4675

Weight distribution, %, f/r

53/47

Payload capacity, lb

1425

GVWR, lb

6100

GCWR, lb

11,500

Towing capacity, lb

6500 (est)

Fuel capacity, gal

23.0

CHASSIS

Suspension, f/r

Ind, A-arms, coil springs, anti-roll bar; solid axle, air/link, panhard rod, anti-roll bar

Steering type

Rack and pinion

Ratio

15.7:1

Turns, lock to lock

3.04

Turning circle, ft

37.4

Brakes, f/r

13.3-in vented disc, ABS/12.3-in vented disc, ABS

Wheels

17x7.5 alloy

Tires

265/65HR17

PERFORMANCE

Acceleration (sec)

0-30

2.52

0-40

4.02

0-50

5.76

0-60

7.98

0-70

10.77

0-80

14.25

0-90

19.11

Standing quarter mile (sec @ mph)

16.05 @ 84.80

Braking, 60-0, ft

131

Speed through 600-ft slalom, mph

57.10

As per Truck Trend.

It is a very good performer and has received high praise from a number of top magazines. It has since claimed Fourwheeler magazines Fourwheeler of the Year award twice in a row. This led to project Trailex.

Some of the common issues with the GX are:

  • Driveline thump when stopping
  • Driveline vibration at 65-70 MPH

 

 

2004 Model

For 2004 the GX underwent some minor changes. It received a sealed transmission with WS ATF, which is supposed to last the lifetime of the vehicle. This also means no dipstick for the trasnmission.

It also received KDSS as an option. KDSS is a suspension system that can automatically disconnect the swaybars in cross axle situations. This allows for more suspension flexibility in offroad conditions. As an added benefit it allows for stiffer swaybars, which improves the onroad handling substantially on the GX.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2005 Model

For 2005 the GX got the upgraded VVTi V8 with 270HP and 330 Lb/ft

Also the navigation system was upgraded from previous versions to make it more user friendly. It also included Bluetooth capability for mobile phones.

2005 GX470 Brochure

 

 

 

2006 Model

The 2006 model didn’t change much from the 2005 model.

Due to new SAE specifications power ratings were changed to 263 HP at 5400 RPM and 323 lb-ft at 3400 RPM.

Some the changes were:

  • New Digital Lexus Link
  • More coat hanger
  • Additional color options
  • New Park Brake Grip

2006 GX470 Brochure

2007 Model

The 2007 model has a few interior upgrades, but the exterior and mechanicals are carried over from 2006.

Interior upgrades:

  • 5th Gen Naviation
  • 9“ screen for RSES
  • MP3/iPod plug in for audio system
  • Upgraded Mark Levison audio now plays DVDs as well MP3/MWV CDs, also able to play movies with Nav system while parked

2007 GX470 Brochure

 

2008 Model

The exterior received a number of changes for 2008, including chromed door handles dark grille, clear lens indicators in the back and silver wheels. Also 2 new exterior colors.

The interiors has also received a number of changes, including chrome for the speakers, different leather and wood for seats/doors/dash.

The tire pressure system has also been updated to be faster acting.

2008 GX470 Brochure

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2009 Model

No model changes were published for the 09 model year for the GX. The current generation GX is not expected to continue as a 2010 model year, similar to the 4Runner.