2003 LEXUS GS 1G-FE/2JZ-GE (S160)

S160 / Sedan / Global (Japan, USA, Europe, others)

1G-FE2JZ-GE3UZ-FEFiche exacte année/versionSilver

Engine identity

Engine code

1G-FE, 2JZ-GE, 3UZ-FE

Engine summary

The 2003 Lexus GS was offered with multiple inline-6 and V8 engines: 2.5L I6 1G-FE (Japan market GS250), 3.0L I6 2JZ-GE (GS300), and 4.3L V8 3UZ-FE (GS430). Engine availability depends on the market: Japan had GS250 and GS300; US and Europe had GS300 and GS430.

Displacement

2492 cc (1G-FE), 2997 cc (2JZ-GE), 4292 cc (3UZ-FE)

Power

204 hp @ 5600 rpm (1G-FE), 225 hp @ 5600 rpm (2JZ-GE), 300 hp @ 5800 rpm (3UZ-FE)

Torque

22.9 kg·m @ 4400 rpm (1G-FE), 29.5 kg·m @ 4800 rpm (2JZ-GE), 43.9 kg·m @ 3400 rpm (3UZ-FE)

Fuel system

Electronic fuel injection

Timing drive

Chain-driven dual overhead camshafts

Port OBD

Verify by VIN and market

Oils and fluids

Type d’huile

SAE 5W-30 API SJ or equivalent

Capacité d’huile

6.9 liters (with filter), service-fill

Liquide de refroidissement

10.4 liters

Fluide

Toyota ATF Type T-IV or equivalent

Differential fluid

Hypoid gear oil SAE 75W-90

Liquide de frein

DOT 3 or DOT 4

Service and parts data

Manual transmission

Not offered in most markets; some regions had optional 5-speed manual with GS250

Automatic transmission

4-speed automatic (U660E) for GS250/GS300, 5-speed automatic (A650E) for GS430

Spark plugs

Iridium spark plugs recommended, gap 0.044 inches (1.1 mm)

Service interval

Every 8,000 miles (13,000 km) or 6 months (oil change)

Dimensions des pneus

225/50R17 (standard), 235/45R18 (optional)

Couple de roue

Verify by VIN and market

Common and chronic problems

Aging air suspension components (on GS430 with ADS)
Oil leaks around valve covers
Automatic transmission wear in high mileage units

First checks

Inspect timing chain tension
Check condition of ignition coils
Monitor transmission fluid health

Avant de remplacer des pièces

Save fault codes and freeze-frame data before clearing anything.
Check engine oil, coolant and transmission fluid using the correct temperature and service procedure.
Verify power, ground, connectors, hoses, leaks and live data before replacing expensive parts.

Important notes

2003 marks the middle year of generation S160 produced 1997-2005.
Engine and trim availability varies by market; GS430 only offered in US, Europe, and select markets.
Oil capacity includes filter change, recommended oil grade is OEM-approved synthetic.

Codes courants

Source and verification notes

Toyota official service manuals and parts catalogs for S160 Lexus GS (2003).
Automotive technical reviews and owner maintenance guides (2003 Lexus GS).

Outils compatibles

Verify by VIN and market

Questions fréquentes

What engine code does the 2003 LEXUS GS 1G-FE/2JZ-GE (S160) use? 2003 LEXUS GS 1G-FE/2JZ-GE (S160) is listed here with engine code 1G-FE, 2JZ-GE, 3UZ-FE; engine summary: The 2003 Lexus GS was offered with multiple inline-6 and V8 engines: 2.5L I6 1G-FE (Japan market GS250), 3.0L I6 2JZ-GE (GS300), and 4.3L V8 3UZ-FE (GS430). Engine availability depends on the market: Japan had GS250 and GS300; US and Europe had GS300 and GS430..
What oil and capacity does the 2003 LEXUS GS 1G-FE/2JZ-GE (S160) use? 2003 LEXUS GS 1G-FE/2JZ-GE (S160) is listed with SAE 5W-30 API SJ or equivalent and oil capacity 6.9 liters (with filter), service-fill. Confirm market and engine option before service.
What are common 2003 LEXUS GS 1G-FE/2JZ-GE (S160) problems? Highlighted checks for 2003 LEXUS GS 1G-FE/2JZ-GE (S160): Aging air suspension components (on GS430 with ADS), Oil leaks around valve covers, Automatic transmission wear in high mileage units.

Engine identity

Engine code

1G-FE, 2JZ-GE, 3UZ-FE

Engine summary

Displacement

2492 cc (1G-FE), 2997 cc (2JZ-GE), 4292 cc (3UZ-FE)

Power

204 hp @ 5600 rpm (1G-FE), 225 hp @ 5600 rpm (2JZ-GE), 300 hp @ 5800 rpm (3UZ-FE)

Torque

22.9 kg·m @ 4400 rpm (1G-FE), 29.5 kg·m @ 4800 rpm (2JZ-GE), 43.9 kg·m @ 3400 rpm (3UZ-FE)

Fuel system

Electronic fuel injection

Timing drive

Chain-driven dual overhead camshafts

Port OBD

Verify by VIN and market

Service and parts data

Manual transmission

Not offered in most markets; some regions had optional 5-speed manual with GS250

Automatic transmission

4-speed automatic (U660E) for GS250/GS300, 5-speed automatic (A650E) for GS430

Spark plugs

Iridium spark plugs recommended, gap 0.044 inches (1.1 mm)

Service interval

Every 8,000 miles (13,000 km) or 6 months (oil change)

Dimensions des pneus

225/50R17 (standard), 235/45R18 (optional)

Couple de roue

Verify by VIN and market

Questions fréquentes

What engine code does the 2003 LEXUS GS 1G-FE/2JZ-GE (S160) use? 2003 LEXUS GS 1G-FE/2JZ-GE (S160) is listed here with engine code 1G-FE, 2JZ-GE, 3UZ-FE; engine summary: The 2003 Lexus GS was offered with multiple inline-6 and V8 engines: 2.5L I6 1G-FE (Japan market GS250), 3.0L I6 2JZ-GE (GS300), and 4.3L V8 3UZ-FE (GS430). Engine availability depends on the market: Japan had GS250 and GS300; US and Europe had GS300 and GS430..

What oil and capacity does the 2003 LEXUS GS 1G-FE/2JZ-GE (S160) use? 2003 LEXUS GS 1G-FE/2JZ-GE (S160) is listed with SAE 5W-30 API SJ or equivalent and oil capacity 6.9 liters (with filter), service-fill. Confirm market and engine option before service.

What are common 2003 LEXUS GS 1G-FE/2JZ-GE (S160) problems? Highlighted checks for 2003 LEXUS GS 1G-FE/2JZ-GE (S160): Aging air suspension components (on GS430 with ADS), Oil leaks around valve covers, Automatic transmission wear in high mileage units.

2003 LEXUS GS 1G-FE/2JZ-GE (S160)

Engine identity

Oils and fluids

Service and parts data

Common and chronic problems

First checks

Avant de remplacer des pièces

Important notes

Scanning Engine...

2003 LEXUS GS 1G-FE/2JZ-GE (S160)

Engine identity

Oils and fluids

Service and parts data

Common and chronic problems

First checks

Avant de remplacer des pièces

Important notes