BMW 740i 2008-2015

BMW 740i 2008-2015 Fuel System Specifications

Detailed technical specifications and maintenance guidelines for the fuel system of the 2008-2015 BMW 740i. Learn about fuel type requirements, fuel pump and injector details, and troubleshooting tips for optimal performance.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the fuel specifications for the 2008-2015 BMW 740i, including key features, measurements, and technical details

How to Use

Use the search function to locate specific fuel specifications by entering keywords such as 'fuel type', 'octane rating', or 'fuel tank capacity'.

Navigate through the fuel documentation sections using the table of contents or by scrolling through the document. Each section is clearly labeled for easy access.

Key Specifications

Fuel Tank Capacity

21.7 gallons (82 liters)

Recommended Octane Rating

91 AKI or higher

Fuel Pressure

5.8 bar (84 psi)

Combined Fuel Economy

20 mpg (11.8 L/100 km)

CO2 Emissions

232 g/km

Available Specifications

Fuel Type and Quality

Details about the recommended fuel type, quality standards, and octane rating for optimal performance

Recommended Fuel Type

Premium unleaded gasoline with an octane rating of 91 AKI (Anti-Knock Index) or higher
Minimum octane rating of 89 AKI is acceptable but may reduce performance
Do not use gasoline with methanol content exceeding 10%
Ethanol blends up to E10 (10% ethanol) are acceptable

Fuel Quality Standards

Fuel must meet ASTM D4814 standards in the USA
In Europe, fuel must comply with EN 228 standards
Avoid using fuel with high sulfur content (maximum 10 ppm)
Use of fuel additives is not recommended unless approved by BMW

Note: Using lower-quality fuel may result in reduced engine performance and increased emissions.

Fuel System Components

Technical details about the fuel system components, including the fuel tank, fuel pump, and injectors

Fuel Tank Specifications

Fuel tank capacity: 21.7 gallons (82 liters)
Material: High-density polyethylene (HDPE) with multi-layer construction
Includes an integrated fuel level sensor
Designed to withstand pressures up to 10 psi

Fuel Pump and Injectors

Electric fuel pump with a flow rate of 120 liters per hour
Fuel pressure: 5.8 bar (84 psi) at idle
Direct fuel injection system with piezo injectors
Injector spray pattern optimized for efficient combustion

Note: Regular maintenance of the fuel system is essential to ensure optimal performance and longevity.

Fuel Consumption and Efficiency

Information about fuel consumption rates, efficiency, and environmental impact

Fuel Economy Ratings

City driving: 17 mpg (13.8 L/100 km)
Highway driving: 25 mpg (9.4 L/100 km)
Combined fuel economy: 20 mpg (11.8 L/100 km)
CO2 emissions: 232 g/km

Efficiency Features

Auto Start-Stop function to reduce idle fuel consumption
Eco Pro mode for optimized fuel efficiency
Lightweight materials to reduce overall vehicle weight
Aerodynamic design to minimize drag

Note: Actual fuel consumption may vary based on driving conditions and habits.

Fuel System Maintenance

Guidelines for maintaining the fuel system to ensure reliability and performance

Routine Maintenance

Replace fuel filter every 30,000 miles (48,000 km)
Inspect fuel lines for leaks or damage during regular service intervals
Clean fuel injectors every 60,000 miles (96,000 km)
Check fuel tank for corrosion or damage annually

Troubleshooting Common Issues

Symptoms of a failing fuel pump: engine hesitation, loss of power, or no start condition
Clogged fuel injectors may cause rough idling or poor acceleration
Fuel pressure issues can lead to inconsistent engine performance
Always use a diagnostic tool to identify fuel system faults

Note: Address fuel system issues promptly to avoid costly repairs.

Search Specifications

Search by specification name, value, or description

Component Specifications

Fuel Type

Recommended Fuel: Premium unleaded gasoline (91 AKI or 95 RON minimum)

Alternative Fuel: Regular unleaded gasoline (87 AKI or 91 RON) with reduced performance

Ethanol Content: Up to 10% ethanol (E10) allowed

Octane Rating: Minimum 91 AKI (Anti-Knock Index)

Fuel Additives: BMW-approved fuel additives recommended for cleaning injectors

Fuel System

Fuel Delivery: Direct injection (High Precision Injection)

Fuel Pump Pressure: 5.0 bar (72.5 psi) nominal

Fuel Tank Capacity: 21.7 gallons (82 liters)

Fuel Filter Part Number: 13 32 7 566 327

injector Part Number: 13 53 7 566 328

Fuel Consumption

City Mpg: 15 mpg

Highway Mpg: 23 mpg

Combined Mpg: 18 mpg

Co2 Emissions: 328 g/km

Fuel Economy Tolerance: ±5% under standard test conditions

Fuel Pump Specifications

Flow Rate: 120 liters per hour (31.7 gallons per hour)

Operating Voltage: 12V DC

Current Draw: 5.5 amps

Pressure Tolerance: ±0.2 bar (±2.9 psi)

Replacement interval: Every 100,000 miles or 10 years

Fuel injector Specifications

Spray Pattern: Multi-hole, cone-shaped

Flow Rate: 200 cc/min at 3.0 bar (43.5 psi)

Opening Pressure: 3.5 bar (50.8 psi)

Resistance: 12 ohms ± 0.5 ohms

Cleaning Interval: Every 30,000 miles or as needed

Fuel Tank Specifications

Material: High-density polyethylene (HDPE)

Capacity: 21.7 gallons (82 liters)

Vent System: Closed-loop evaporative emissions system

Pressure Rating: 0.5 bar (7.25 psi) maximum

Safety Features: Rollover valve and impact-resistant design

Fuel Pressure Regulator

Operating Pressure: 5.0 bar (72.5 psi)

Tolerance: ±0.1 bar (±1.45 psi)

Part Number: 13 53 7 566 329

Replacement interval: Every 150,000 miles or as needed

Diagnostic Tool: BMW ISTA/D for pressure testing

Fuel Filter Specifications

Filtration Level: 10 microns

Flow Rate: 100 liters per hour (26.4 gallons per hour)

Pressure Drop: 0.3 bar (4.35 psi) maximum

Replacement interval: Every 60,000 miles or 6 years

Part Number: 13 32 7 566 327

Fuel System Maintenance

injector Cleaning: Every 30,000 miles or as needed

Fuel Filter Replacement: Every 60,000 miles or 6 years

Fuel Pump inspection: Every 100,000 miles or 10 years

Fuel Tank Cleaning: As needed, typically every 150,000 miles

Diagnostic Checks: BMW ISTA/D for system diagnostics

Fuel System Diagnostics

Diagnostic Tool: BMW ISTA/D

Common Codes

P0171 - System too lean
P0172 - System too rich
P0087 - Fuel rail/system pressure too low
P0088 - Fuel rail/system pressure too high

Pressure Test: 5.0 bar (72.5 psi) nominal

Leak Test: 0.5 bar (7.25 psi) maximum

injector Test: Flow rate and spray pattern analysis

Service Information Service

Detailed service requirements and schedules for the fuel system

30,000 miles

24 months

Inspect fuel injectors
Clean fuel injectors if necessary
Check fuel pressure

Use BMW-approved cleaning solutions

60,000 miles

48 months

Replace fuel filter
Inspect fuel pump
Check fuel lines for leaks

Use OEM fuel filter part number 13 32 7 566 327

100,000 miles

120 months

Replace fuel pump
Inspect fuel tank
Perform full system diagnostics

Use BMW ISTA/D for diagnostics

Frequently Asked Questions

Find answers to common questions about torque specifications

What type of fuel is recommended for the 2008-2015 BMW 740i?

The 2008-2015 BMW 740i requires premium unleaded gasoline with an octane rating of 91 or higher. Using lower octane fuel may result in reduced performance and engine knocking.

What is the fuel tank capacity of the 2008-2015 BMW 740i?

The fuel tank capacity of the 2008-2015 BMW 740i is 21.7 gallons (82 liters). This allows for extended driving ranges between refueling.

What is the fuel economy of the 2008-2015 BMW 740i?

The 2008-2015 BMW 740i has an EPA-estimated fuel economy of 17 mpg in the city and 25 mpg on the highway. Actual mileage may vary based on driving conditions and habits.

Can I use ethanol-blended fuel in the 2008-2015 BMW 740i?

The 2008-2015 BMW 740i can use ethanol-blended fuels with up to 10% ethanol (E10). Using fuels with higher ethanol content may damage the fuel system and void the warranty.

What should I do if I accidentally use the wrong type of fuel?

If you accidentally use the wrong type of fuel, do not start the engine. Contact a BMW-certified technician immediately to drain and flush the fuel system to prevent potential damage.

Factory Service Resources

Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.

BMW Fuel System Maintenance Guide

Coming Soon

Detailed guide on maintaining the fuel system of your BMW 740i, including fuel filter replacement and injector cleaning.

Understanding Octane Ratings

Coming Soon

Learn about octane ratings and why using the correct fuel is crucial for your BMW 740i's performance and longevity.

BMW Fuel Additives and Treatments

Coming Soon

Information on recommended fuel additives and treatments to keep your BMW 740i's fuel system in optimal condition.

Fuel Efficiency Tips for BMW 740i

Coming Soon

Practical tips to improve fuel efficiency and reduce fuel consumption in your BMW 740i.

About the Author

Expert automotive knowledge and experience

ASE

Alan Montanye

Automotive Technical Specialist

ASE Master Certified Technician with over a decade of hands-on experience in automotive repair and diagnostics.

Facebook Contact

15+ Years

Experience

500+ Guides

Guides

50+ Makes

Vehicles

1000+ Solutions

Solutions

Diagnostic

Specialized in advanced diagnostic techniques using modern scan tools and oscilloscopes.

Repair

Expert in both traditional mechanical repairs and modern vehicle systems.

Additional Expertise

Documentation

Created over 500 detailed repair guides and technical documents.

Training

Conducted technical training sessions and contributed to repair databases.

Certifications & Research

Certifications

ASE Master Technician Certification
Advanced Diagnostic Specialist
Hybrid/Electric Vehicle Systems
Performance Tuning Expert

Research & Community

Actively researches emerging technologies and contributes to automotive forums.

Legal Disclaimer

Important information about using this content

Always refer to your vehicle's service manual and take appropriate safety precautions when performing any maintenance or repairs.

General Information

The information provided on this website is for general informational purposes only. While we strive to maintain accuracy in our content, all specifications, procedures, and technical information should be verified against your vehicle's official service manual or with the manufacturer directly.

Warranty & Liability

The content on this website is provided "as is" without any representations or warranties, express or implied. We make no representations or warranties regarding the accuracy, completeness, or availability of the information.

We shall not be liable for any direct, indirect, special, or consequential damages arising from the use of information on this website.

Technical Information

All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
Vehicle specifications and procedures may vary by model year, trim level, and region.
Always follow the manufacturer's recommended procedures and safety precautions.
Working on vehicles can be dangerous. Always take proper safety precautions and use appropriate safety equipment.
If you're unsure about any procedure, consult a qualified professional mechanic.

Intellectual Property

All content, including text, images, and specifications, is protected by copyright and other intellectual property laws. Any unauthorized use or reproduction is prohibited.