2003 LEXUS LS 1UZ-FE/3UZ-FE (XF30)

XF30 / Sedan / Global (primarily Japan, North America, Europe, Australia)

1UZ-FE3UZ-FEFiche exacte année/versionGold

Engine identity

Engine code

1UZ-FE, 3UZ-FE

Engine summary

2003 Lexus LS was offered with V8 engines: the 4.0L 1UZ-FE (in Japan and some markets) and the 4.3L 3UZ-FE (in the U.S., Europe, Australia).

Displacement

3969 cc (1UZ-FE), 4292 cc (3UZ-FE)

Power

Approximately 250–300 hp depending on engine and market

Torque

Approximately 300–320 Nm

Fuel system

Electronic fuel injection

Timing drive

Timing belt (1UZ-FE and 3UZ-FE)

Port OBD

Verify by VIN and market

Oils and fluids

Type d’huile

SAE 5W-30 or manufacturer's specification synthetic oil

Capacité d’huile

Approximately 6.5 liters service fill including filter on 3UZ-FE (varies by engine, consult manual)

Liquide de refroidissement

Approx. 11.5 liters

Fluide

Dexron III or equivalent ATF

Differential fluid

GL-5 75W-90 gear oil

Liquide de frein

DOT 3 or DOT 4

Service and parts data

Manual transmission

Not available; all models had automatic transmission

Automatic transmission

5-speed automatic (Aisin-Warner A650E or equivalent)

Spark plugs

Iridium-tipped, gap ~0.044 inches (1.1 mm)

Service interval

10,000 miles / 16,000 km or 12 months

Dimensions des pneus

225/55R16, 225/50R17

Couple de roue

Verify by VIN and market

Common and chronic problems

Timing belt wear and recommended replacement interval
Suspension air compressor failure (some markets with air suspension)

First checks

Timing belt condition and replacement history
Cooling system leaks and condition
Transmission fluid level and condition

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

Market variations exist; 3UZ-FE primarily for North America and some export markets, 1UZ-FE primarily Japan.
No manual transmission available; all vehicles used automatic.

Codes courants

Source and verification notes

Official Lexus 2003 service manuals and technical bulletins.
Verified enthusiast and automotive repair databases covering global Lexus LS XF30 models in 2003.

Outils compatibles

Verify by VIN and market

Questions fréquentes

What engine code does the 2003 LEXUS LS 1UZ-FE/3UZ-FE (XF30) use? 2003 LEXUS LS 1UZ-FE/3UZ-FE (XF30) is listed here with engine code 1UZ-FE, 3UZ-FE; engine summary: 2003 Lexus LS was offered with V8 engines: the 4.0L 1UZ-FE (in Japan and some markets) and the 4.3L 3UZ-FE (in the U.S., Europe, Australia)..
What oil and capacity does the 2003 LEXUS LS 1UZ-FE/3UZ-FE (XF30) use? 2003 LEXUS LS 1UZ-FE/3UZ-FE (XF30) is listed with SAE 5W-30 or manufacturer's specification synthetic oil and oil capacity Approximately 6.5 liters service fill including filter on 3UZ-FE (varies by engine, consult manual). Confirm market and engine option before service.
What are common 2003 LEXUS LS 1UZ-FE/3UZ-FE (XF30) problems? Highlighted checks for 2003 LEXUS LS 1UZ-FE/3UZ-FE (XF30): Timing belt wear and recommended replacement interval, Suspension air compressor failure (some markets with air suspension).

Engine identity

Engine code

1UZ-FE, 3UZ-FE

Engine summary

2003 Lexus LS was offered with V8 engines: the 4.0L 1UZ-FE (in Japan and some markets) and the 4.3L 3UZ-FE (in the U.S., Europe, Australia).

Displacement

3969 cc (1UZ-FE), 4292 cc (3UZ-FE)

Power

Approximately 250–300 hp depending on engine and market

Torque

Approximately 300–320 Nm

Fuel system

Electronic fuel injection

Timing drive

Timing belt (1UZ-FE and 3UZ-FE)

Port OBD

Verify by VIN and market

Oils and fluids

Type d’huile

SAE 5W-30 or manufacturer's specification synthetic oil

Capacité d’huile

Approximately 6.5 liters service fill including filter on 3UZ-FE (varies by engine, consult manual)

Liquide de refroidissement

Approx. 11.5 liters

Fluide

Dexron III or equivalent ATF

Differential fluid

GL-5 75W-90 gear oil

Liquide de frein

DOT 3 or DOT 4

Service and parts data

Manual transmission

Not available; all models had automatic transmission

Automatic transmission

5-speed automatic (Aisin-Warner A650E or equivalent)

Spark plugs

Iridium-tipped, gap ~0.044 inches (1.1 mm)

Service interval

10,000 miles / 16,000 km or 12 months

Dimensions des pneus

225/55R16, 225/50R17

Couple de roue

Verify by VIN and market

Questions fréquentes

What engine code does the 2003 LEXUS LS 1UZ-FE/3UZ-FE (XF30) use? 2003 LEXUS LS 1UZ-FE/3UZ-FE (XF30) is listed here with engine code 1UZ-FE, 3UZ-FE; engine summary: 2003 Lexus LS was offered with V8 engines: the 4.0L 1UZ-FE (in Japan and some markets) and the 4.3L 3UZ-FE (in the U.S., Europe, Australia)..

What oil and capacity does the 2003 LEXUS LS 1UZ-FE/3UZ-FE (XF30) use? 2003 LEXUS LS 1UZ-FE/3UZ-FE (XF30) is listed with SAE 5W-30 or manufacturer's specification synthetic oil and oil capacity Approximately 6.5 liters service fill including filter on 3UZ-FE (varies by engine, consult manual). Confirm market and engine option before service.

What are common 2003 LEXUS LS 1UZ-FE/3UZ-FE (XF30) problems? Highlighted checks for 2003 LEXUS LS 1UZ-FE/3UZ-FE (XF30): Timing belt wear and recommended replacement interval, Suspension air compressor failure (some markets with air suspension).

2003 LEXUS LS 1UZ-FE/3UZ-FE (XF30)

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 LS 1UZ-FE/3UZ-FE (XF30)

Engine identity

Oils and fluids

Service and parts data

Common and chronic problems

First checks

Avant de remplacer des pièces

Important notes