Infiniti M45 2003-2004 Fuel System Specifications
Explore detailed fuel specifications for the 2003-2004 Infiniti M45, including fuel type, tank capacity, economy, and emission standards. Ideal for maintenance, repairs, and performance upgrades.
Overview Specifications
This document provides detailed fuel specifications and related information for the 2003-2004 Infiniti M45. It is designed to help users understand the vehicle's fuel requirements, efficiency, and performance. Use the search functionality to quickly locate specific details or navigate through the sections for a comprehensive understanding of the fuel system and its components.
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Key Specifications
Fuel Type
Premium Unleaded (91+ octane)
Fuel Tank Capacity
20.1 gallons
City MPG
16 mpg
Highway MPG
22 mpg
Combined MPG
18 mpg
Available Specifications
Fuel Requirements
This section outlines the type of fuel recommended for the 2003-2004 Infiniti M45, including octane ratings and any additives or treatments that may enhance performance or protect the engine.
Fuel Requirements
This section outlines the type of fuel recommended for the 2003-2004 Infiniti M45, including octane ratings and any additives or treatments that may enhance performance or protect the engine.
Recommended Fuel Type
- Premium unleaded gasoline with an octane rating of 91 or higher
- Lower octane fuel can be used but may reduce performance
- Avoid using diesel or ethanol blends above 10%
- Use of fuel additives is optional but not required
Fuel Additives
- Detergent additives can help maintain fuel injector cleanliness
- Avoid using additives containing methanol or silicone
- Octane boosters are not necessary but can be used in emergencies
- Consult the owner's manual for specific additive recommendations
Fuel Efficiency
This section provides details on the fuel efficiency of the 2003-2004 Infiniti M45, including EPA estimates, driving conditions that affect mileage, and tips for improving fuel economy.
Fuel Efficiency
This section provides details on the fuel efficiency of the 2003-2004 Infiniti M45, including EPA estimates, driving conditions that affect mileage, and tips for improving fuel economy.
EPA Estimates
- City driving: 16 miles per gallon (mpg)
- Highway driving: 22 mpg
- Combined city/highway: 18 mpg
- Actual mileage may vary based on driving habits and conditions
Factors Affecting Efficiency
- Aggressive driving reduces fuel efficiency
- Cold weather can lower mileage by up to 20%
- Proper tire inflation improves fuel economy
- Regular maintenance ensures optimal performance
Fuel System Components
This section covers the key components of the fuel system in the 2003-2004 Infiniti M45, including the fuel tank, fuel pump, injectors, and filters. It also provides maintenance tips to ensure longevity and performance.
Fuel System Components
This section covers the key components of the fuel system in the 2003-2004 Infiniti M45, including the fuel tank, fuel pump, injectors, and filters. It also provides maintenance tips to ensure longevity and performance.
Fuel Tank
- Capacity: 20.1 gallons
- Material: High-density polyethylene
- Includes a fuel level sensor
- Designed to minimize evaporative emissions
Fuel Pump and Injectors
- Electric fuel pump with a flow rate of 45 gallons per hour
- Multi-port fuel injection system
- Injectors are designed for precise fuel delivery
- Regular cleaning recommended to prevent clogging
Fuel Filter
- Located in the fuel line near the tank
- Replacement interval: Every 30,000 miles
- Helps prevent contaminants from reaching the engine
- Signs of a clogged filter include reduced performance and stalling
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Component Specifications
Overview
- Type
- Gasoline
- Octane Rating
- 91 (recommended)
- Tank Capacity
- 20.1 gallons (76.1 liters)
- Fuel System
- Sequential Multi-Port Fuel Injection
- Emission Standard
- LEV (Low Emission Vehicle)
Dimensions
- Tank Length
- 36.2 inches (92 cm)
- Tank Width
- 24.8 inches (63 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 (3.1 bar)
- Fuel Filter Size
- 5.5 inches x 2.2 inches (14 cm x 5.6 cm)
Materials
- Fuel Tank
- High-density polyethylene
- Fuel Lines
- Nylon with rubber coating
- Fuel Pump
- Stainless steel and plastic composite
- Fuel Filter
- Pleated paper element with metal casing
Features
- Fuel Delivery
-
- Electronic fuel injection
- Variable fuel pressure regulation
- Returnless fuel system
- Monitoring
-
- Fuel level sensor
- Low fuel warning light
- Real-time fuel economy display
- Safety
-
- Rollover valve
- Evaporative emissions control
- Fuel cut-off in crash detection
- Efficiency
-
- Optimized fuel injectors
- Air-fuel ratio sensor
- Closed-loop fuel control
Safety Features
- Crash Safety
-
- Automatic fuel pump shutoff
- Impact-resistant fuel tank
- Fire Prevention
-
- Flame arrestor in filler neck
- Heat shield around fuel lines
- Emissions Control
-
- Charcoal canister
- Sealed fuel system
Comfort Features
- Refueling
-
- Easy-access fuel door
- Capless fuel filler
- Automatic fuel door release
- Driving
-
- Smooth fuel delivery
- Consistent fuel pressure
- Quiet fuel pump operation
Accessories
- Aftermarket
-
- High-performance fuel pump
- Upgraded fuel filter
- Fuel system cleaner
- Oem
-
- Genuine fuel cap
- Fuel tank straps
- Fuel level sensor assembly
- Maintenance
-
- Fuel injector cleaner
- Fuel system treatment
- Fuel stabilizer
Maintenance
- Service interval
- Every 30,000 miles or 24 months
- Service Items
-
- Replace fuel filter
- Inspect fuel lines for leaks
- Check fuel pump operation
- Test fuel pressure
- Clean fuel injectors
- Maintenance Notes
- Use only recommended fuel grade for optimal performance
Warranty
- Basic
- Miles: 36,000Years: 3Coverage: Fuel system components
- Powertrain
- Miles: 60,000Years: 5Coverage: Fuel pump and injectors
- Emissions
- Miles: 50,000Years: 4Coverage: Evaporative emissions system
- Corrosion
- Miles: UnlimitedYears: 7Coverage: Fuel tank corrosion
Production Details
- Manufacturer
- Infiniti (Nissan Motor Co.)
- Manufacturing Process
-
- Injection molding for fuel tank
- Robotic assembly for fuel lines
- Precision calibration for fuel injectors
- Quality Control
- Pressure Testing: All fuel tanks tested at 15 psiLeak Detection: 100% inspection of fuel linesPerformance Verification: Fuel pump flow rate tested
- Sustainability Practices
-
- Recycled materials in fuel tank
- Low-VOC fuel system components
- Eco-friendly packaging
- Production Metrics
- Annual Production: 15,000 unitsDefect Rate: 0.02%Energy Efficiency: 95%
Service Information for fuel Service
Maintenance and service requirements specific to the fuel system
- Replace fuel filter
- Inspect fuel lines and connections
- Check fuel pump operation
- Test fuel pressure
- Clean fuel injectors
Use OEM parts for replacement to maintain system integrity
- Replace fuel pump if necessary
- Inspect fuel tank for damage
- Check evaporative emissions system
- Test fuel pressure regulator
- Inspect fuel injector seals
Special diagnostic tools required for fuel system testing
- Replace fuel pump assembly
- Inspect and clean fuel tank
- Replace fuel injectors if needed
- Check and replace fuel pressure sensor
- Perform complete fuel system diagnostic
Major service may require fuel system depressurization
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What type of fuel is recommended for the 2003-2004 Infiniti M45?
What type of fuel is recommended for the 2003-2004 Infiniti M45?
The 2003-2004 Infiniti M45 requires premium unleaded gasoline with an octane rating of 91 or higher. Using lower octane fuel may result in reduced performance and engine knocking. The vehicle's 4.5L V8 engine is designed to optimize performance and efficiency with premium fuel, ensuring smooth operation and longevity.
Q2 What are the maintenance requirements for the fuel system in the 2003-2004 Infiniti M45?
What are the maintenance requirements for the fuel system in the 2003-2004 Infiniti M45?
Regular maintenance for the fuel system includes inspecting and replacing the fuel filter every 30,000 miles, checking fuel injectors for clogs, and ensuring the fuel pump operates correctly. Additionally, using high-quality fuel additives periodically can help maintain injector cleanliness and overall system performance.
Q3 How do I replace the fuel filter in a 2003-2004 Infiniti M45?
How do I replace the fuel filter in a 2003-2004 Infiniti M45?
To replace the fuel filter, first, relieve fuel system pressure by disconnecting the fuel pump fuse and running the engine until it stalls. Locate the fuel filter near the fuel tank, disconnect the fuel lines, and remove the mounting bolts. Install the new filter, reconnect the fuel lines, and secure it with the mounting bolts. Finally, reconnect the fuel pump fuse and start the engine to check for leaks.
Q4 What should I do if my 2003-2004 Infiniti M45 experiences poor fuel economy?
What should I do if my 2003-2004 Infiniti M45 experiences poor fuel economy?
Poor fuel economy can result from clogged fuel injectors, a dirty air filter, or improper tire pressure. Start by checking and replacing the air filter if necessary. Inspect the fuel injectors for clogs and clean or replace them. Ensure tires are inflated to the recommended pressure. If issues persist, have the vehicle's onboard diagnostics system scanned for error codes.
Q5 How can I optimize the fuel efficiency of my 2003-2004 Infiniti M45?
How can I optimize the fuel efficiency of my 2003-2004 Infiniti M45?
To optimize fuel efficiency, maintain proper tire pressure, use premium fuel, and avoid aggressive driving. Regularly replace the air filter and ensure the fuel system is clean. Keeping up with scheduled maintenance, such as oil changes and spark plug replacements, also contributes to better fuel economy and overall performance.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
2003-2004 Infiniti M45 Service Manual
Coming SoonComprehensive guide covering maintenance procedures, technical specifications, and troubleshooting for the 2003-2004 Infiniti M45.
Technical Service Bulletin: Fuel System Updates
Coming SoonDetails updates and fixes for the fuel system in the 2003-2004 Infiniti M45, including common issues and recommended solutions.
Infiniti M45 Parts and Accessories Catalog
Coming SoonCatalog listing OEM and aftermarket parts and accessories for the 2003-2004 Infiniti M45, including fuel system components.
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