Lexus GX 2003-2009 Fuel System Specifications
Explore detailed fuel specifications for the 2003-2009 Lexus GX, including fuel type, tank capacity, economy, and emission standards. Essential for maintenance, performance, and compliance.
Overview Specifications
This document provides detailed fuel specifications and related information for the 2003-2009 Lexus GX. It includes sections on fuel types, consumption, capacity, and efficiency, along with tips for optimizing fuel usage. Use this guide to understand the technical aspects of the vehicle's fuel system and to make informed decisions about maintenance and driving habits.
How to Use
Use the search functionality to quickly locate specific fuel-related terms or specifications. Enter keywords like 'fuel capacity' or 'mileage' to find relevant sections.
Navigate through the sections using the table of contents. Each section is labeled clearly, and subsections provide detailed information on specific topics.
Key Specifications
Fuel Type
Premium Unleaded
Fuel Capacity
23 gallons
City Mileage
15 MPG
Highway Mileage
19 MPG
Combined Mileage
17 MPG
Available Specifications
Fuel Types and Requirements
This section covers the types of fuel recommended for the 2003-2009 Lexus GX, including octane ratings and any specific requirements. It also explains the impact of using different fuel types on performance and engine health.
Fuel Types and Requirements
This section covers the types of fuel recommended for the 2003-2009 Lexus GX, including octane ratings and any specific requirements. It also explains the impact of using different fuel types on performance and engine health.
Recommended Fuel Types
- Premium unleaded gasoline with an octane rating of 91 or higher
- Regular unleaded gasoline (87 octane) can be used but may reduce performance
- Ethanol blends up to E10 are acceptable
- Do not use diesel or other non-gasoline fuels
Fuel Additives
- Use Lexus-approved fuel additives for optimal performance
- Avoid additives with high levels of alcohol or silicone
- Regular use of fuel system cleaners is recommended
- Check the owner's manual for specific additive recommendations
Fuel Efficiency and Consumption
This section provides details on the fuel efficiency of the 2003-2009 Lexus GX, including city, highway, and combined mileage. It also discusses factors that can affect fuel consumption and tips for improving efficiency.
Fuel Efficiency and Consumption
This section provides details on the fuel efficiency of the 2003-2009 Lexus GX, including city, highway, and combined mileage. It also discusses factors that can affect fuel consumption and tips for improving efficiency.
Mileage Ratings
- City mileage: 15 MPG
- Highway mileage: 19 MPG
- Combined mileage: 17 MPG
- Actual mileage may vary based on driving conditions
Factors Affecting Fuel Consumption
- Driving habits such as rapid acceleration and braking
- Vehicle load and towing
- Tire pressure and alignment
- Environmental conditions like temperature and altitude
Fuel System and Capacity
This section explains the fuel system components and the fuel capacity of the 2003-2009 Lexus GX. It includes information on the fuel tank, fuel pump, and related systems.
Fuel System and Capacity
This section explains the fuel system components and the fuel capacity of the 2003-2009 Lexus GX. It includes information on the fuel tank, fuel pump, and related systems.
Fuel Tank Capacity
- Total fuel tank capacity: 23 gallons
- Reserve fuel capacity: approximately 3 gallons
- Fuel tank material: high-density polyethylene
- Fuel tank location: rear of the vehicle
Fuel System Components
- Electric fuel pump with integrated fuel gauge
- Fuel filter with replaceable cartridge
- Fuel injectors designed for precise fuel delivery
- Evaporative emission control system to reduce emissions
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Component Specifications
Overview
- Type
- Gasoline
- Octane Rating
- 91 (recommended), 87 (minimum)
- Fuel System
- Sequential Multi-Port Fuel Injection
- Tank Capacity
- 23.8 gallons (90 liters)
- Fuel Economy
- 15 mpg city / 20 mpg highway (estimated)
- Emission Standard
- LEV (Low Emission Vehicle)
Dimensions
- Tank Length
- 42.5 inches (108 cm)
- Tank Width
- 28.3 inches (72 cm)
- Tank Height
- 12.6 inches (32 cm)
- Filler Neck Diameter
- 1.5 inches (3.8 cm)
- Fuel Line Diameter
- 0.5 inches (1.27 cm)
- Fuel Pump Output
- 45 psi (310 kPa)
- Fuel Filter Size
- 2.5 inches x 1.5 inches (6.35 cm x 3.81 cm)
Materials
- Tank Material
- High-density polyethylene (HDPE)
- Fuel Lines
- Reinforced rubber with nylon coating
- Filler Neck
- Stainless steel
- Fuel Pump
- Thermoplastic housing with stainless steel internals
- Fuel Filter
- Cellulose and resin composite
Features
- Fuel Delivery
-
- Sequential fuel injection
- Variable fuel pressure regulation
- Returnless fuel system
- Tank Features
-
- Impact-resistant design
- Internal baffles for fuel stability
- Integrated fuel pump module
- Vapor recovery system
- Emission Control
-
- Evaporative emissions system
- Charcoal canister
- Onboard diagnostics (OBD-II)
- Catalytic converter compatibility
- Safety
-
- Rollover valve
- Fuel cut-off switch
- Leak detection system
- Maintenance
-
- Replaceable fuel filter
- Serviceable fuel pump
- Accessible fuel lines
Safety Features
- Tank Safety
-
- Impact-resistant construction
- Rollover protection valve
- Flame arrestor in filler neck
- Leak Prevention
-
- Sealed fuel system
- Pressure monitoring
- Vapor recovery system
- Emergency Features
-
- Fuel cut-off switch
- Impact sensor
- Overflow prevention
Comfort Features
- Refueling
-
- Easy-access filler neck
- Automatic shut-off nozzle compatibility
- Fuel cap tether
- Driving
-
- Smooth fuel delivery
- Quiet operation
- Stable fuel pressure
- Maintenance
-
- Easy fuel filter replacement
- Accessible fuel pump
- Clear fuel lines
Accessories
- Fuel Additives
-
- Fuel system cleaner
- Octane booster
- Fuel stabilizer
- Replacement Parts
-
- Fuel filter
- Fuel pump assembly
- Fuel cap
- Diagnostic Tools
-
- Fuel pressure gauge
- OBD-II scanner
- Fuel system tester
Maintenance
- Service interval
- Every 30,000 miles or 24 months
- Service Items
-
- Inspect fuel lines for leaks
- Replace fuel filter
- Check fuel pump operation
- Inspect fuel tank for damage
- Test fuel pressure
- Maintenance Notes
- Use only recommended fuel types and additives. Avoid running the tank below 1/4 capacity to prevent fuel pump overheating.
Warranty
- Basic Warranty
- Miles: 50,000Years: 4Coverage: Fuel system components excluding wear items
- Emissions Warranty
- Miles: 80,000Years: 8Coverage: Fuel system components affecting emissions
- Corrosion Warranty
- Miles: UnlimitedYears: 5Coverage: Fuel tank corrosion
- Extended Warranty
- Miles: 100,000Years: 7Coverage: Fuel pump and injectors
Production Details
- Manufacturer
- Denso Corporation
- Manufacturing Process
-
- Injection molding for fuel tank
- Precision machining for fuel pump
- Automated assembly for fuel system
- Quality Control
- Pressure Testing: 100% testedLeak Testing: 100% testedMaterial inspection: Batch tested
- Sustainability Practices
-
- Recycled materials in fuel tank
- Low-emission manufacturing
- Energy-efficient production
- Production Metrics
- Annual Production: 500,000 unitsDefect Rate: 0.01%Recycling Rate: 95%
Service Information for fuel Service
Maintenance and service requirements specific to the fuel system
- Inspect fuel lines and connections
- Replace fuel filter
- Check fuel pump operation
- Inspect fuel tank for damage
- Test fuel pressure
Use only manufacturer-approved replacement parts
- Replace fuel filter
- Inspect fuel injectors
- Check fuel pressure regulator
- Test evaporative emissions system
- Inspect charcoal canister
Perform fuel system cleaning if necessary
- Replace fuel pump assembly
- Inspect and clean fuel injectors
- Replace fuel lines if necessary
- Test entire fuel system
- Inspect and replace fuel cap if needed
Consider complete fuel system overhaul at this interval
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What type of fuel is recommended for the 2003-2009 Lexus GX?
What type of fuel is recommended for the 2003-2009 Lexus GX?
The 2003-2009 Lexus GX is designed to run on premium unleaded gasoline with an octane rating of 91 or higher. While it can operate on regular unleaded gasoline (87 octane), using premium fuel ensures optimal performance, fuel efficiency, and engine longevity. Always refer to the owner's manual for specific fuel recommendations and avoid using diesel or ethanol blends above 10% (E10).
Q2 How often should I replace the fuel filter in my Lexus GX?
How often should I replace the fuel filter in my Lexus GX?
The fuel filter in the 2003-2009 Lexus GX typically requires replacement every 30,000 to 40,000 miles, depending on driving conditions. Regular replacement ensures proper fuel flow and prevents contaminants from reaching the engine. Consult your owner's manual or a certified technician for precise intervals and signs of a clogged filter, such as reduced engine performance or difficulty starting.
Q3 How do I replace the fuel pump in a 2003-2009 Lexus GX?
How do I replace the fuel pump in a 2003-2009 Lexus GX?
To replace the fuel pump in a 2003-2009 Lexus GX, first, disconnect the battery and relieve fuel system pressure. Remove the rear seat to access the fuel pump assembly. Disconnect electrical connectors and fuel lines, then unscrew the retaining ring to remove the pump. Install the new pump, reassemble components, and reconnect the battery. Test for leaks and proper operation before driving.
Q4 What should I do if my Lexus GX has poor fuel economy?
What should I do if my Lexus GX has poor fuel economy?
Poor fuel economy in a 2003-2009 Lexus GX can result from several issues, including dirty air filters, faulty oxygen sensors, or underinflated tires. Check and replace the air filter, inspect tire pressure, and ensure the oxygen sensors are functioning correctly. Additionally, avoid excessive idling and aggressive driving. If problems persist, consult a technician for a diagnostic scan.
Q5 How can I improve the fuel efficiency of my Lexus GX?
How can I improve the fuel efficiency of my Lexus GX?
To improve fuel efficiency in your 2003-2009 Lexus GX, maintain proper tire pressure, use premium fuel, and replace air filters regularly. Avoid carrying unnecessary weight and reduce aerodynamic drag by removing roof racks when not in use. Drive smoothly, avoiding rapid acceleration and braking. Regular maintenance, such as oil changes and spark plug replacements, also enhances efficiency.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
2003-2009 Lexus GX Service Manual
Coming SoonComprehensive guide covering maintenance, repairs, and technical specifications for the 2003-2009 Lexus GX.
Technical Service Bulletin: Fuel System Updates
Coming SoonDetails updates and fixes for fuel system components in the 2003-2009 Lexus GX.
Lexus GX Parts and Accessories Catalog
Coming SoonCatalog listing OEM and aftermarket parts and accessories for the 2003-2009 Lexus GX.
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