BMW 640i 2018-present Fuel System Specifications
Comprehensive technical guide for the fuel system of the 2018-Present BMW 640I, covering fuel type, pressure, injector specs, and pump requirements. Essential for technicians and enthusiasts.
Overview Specifications
Comprehensive description of the fuel specifications for the 2018-Present BMW 640I, 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 major section is labeled with a clear title and includes subsections for detailed information.
Key Specifications
Fuel Tank Capacity
18.5 gallons (70 liters)
Recommended Octane Rating
91 AKI (95 RON)
Combined Fuel Economy
24 MPG (9.8 L/100 km)
CO2 Emissions
185 g/km
Fuel Injector Flow Rate
200 cc/min at 3 bar
Available Specifications
Fuel Type and Quality
Details about the recommended fuel type, quality standards, and octane rating for optimal performance and engine longevity.
Fuel Type and Quality
Details about the recommended fuel type, quality standards, and octane rating for optimal performance and engine longevity.
Recommended Fuel Type
- Premium unleaded gasoline with an octane rating of 91 AKI (95 RON) or higher
- Minimum octane rating of 89 AKI (93 RON) is acceptable but may reduce performance
- Use of lower octane fuel may cause engine knocking and reduced efficiency
- Ethanol content should not exceed 10% (E10)
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 metallic additives or high sulfur content
- Use of fuel system cleaners is recommended every 10,000 miles
Note: Using substandard fuel may void the vehicle's warranty.
Fuel System Components
Technical details about the fuel system components, including the fuel tank, fuel pump, and injectors.
Fuel System Components
Technical details about the fuel system components, including the fuel tank, fuel pump, and injectors.
Fuel Tank Specifications
- Fuel tank capacity: 18.5 gallons (70 liters)
- Material: High-density polyethylene with anti-corrosion coating
- Includes an integrated fuel level sensor for accurate readings
- Designed for a maximum pressure of 75 psi
Fuel Injector Specifications
- Direct fuel injection system with piezo-electric injectors
- Injector flow rate: 200 cc/min at 3 bar pressure
- Operating voltage: 12V DC
- Designed for precise fuel delivery and reduced emissions
Note: Regular maintenance of injectors is required to prevent clogging.
Fuel Consumption and Efficiency
Information about the vehicle's fuel consumption rates, efficiency, and factors affecting performance.
Fuel Consumption and Efficiency
Information about the vehicle's fuel consumption rates, efficiency, and factors affecting performance.
Fuel Economy Ratings
- City driving: 20 MPG (11.8 L/100 km)
- Highway driving: 30 MPG (7.8 L/100 km)
- Combined fuel economy: 24 MPG (9.8 L/100 km)
- CO2 emissions: 185 g/km
Factors Affecting Fuel Efficiency
- Driving style: Aggressive driving reduces efficiency by up to 33%
- Tire pressure: Under-inflated tires can decrease fuel economy by 3%
- Load weight: Additional weight reduces efficiency by 1-2% per 100 lbs
- Aerodynamics: Roof racks and open windows increase drag
Note: Regular maintenance and proper tire inflation can improve fuel efficiency.
Fuel System Maintenance
Guidelines for maintaining the fuel system, including inspection intervals and common issues.
Fuel System Maintenance
Guidelines for maintaining the fuel system, including inspection intervals and common issues.
Inspection and Maintenance Schedule
- Inspect fuel lines and connections every 15,000 miles
- Replace fuel filter every 30,000 miles
- Check fuel injectors for clogging every 20,000 miles
- Perform a fuel system cleaning every 10,000 miles
Common Fuel System Issues
- Clogged fuel injectors due to poor-quality fuel
- Fuel pump failure caused by running on low fuel levels
- Leaking fuel lines due to wear or corrosion
- Faulty fuel level sensor leading to inaccurate readings
Note: Addressing issues promptly can prevent costly repairs.
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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)
- Octane Rating
- 91 AKI (95 RON) minimum for optimal performance
- Fuel Additives
- BMW-approved fuel additives recommended for cleaning injectors
Fuel System
- Fuel Delivery
- Direct injection (High Precision Injection)
- Fuel Pump Type
- Electric in-tank fuel pump
- Fuel Pressure
- 200-220 bar (2900-3190 psi)
- Fuel Filter Part Number
- 13 32 7 586 611
- Fuel Tank Capacity
- 18.5 gallons (70 liters)
Fuel injectors
- injector Type
- Solenoid-operated direct fuel injectors
- injector Flow Rate
- 15.5-16.5 cc/sec at 3 bar
- injector Part Number
- 13 62 7 586 612
- injector Seal Part Number
- 13 53 7 586 613
- injector Cleaning Interval
- Every 30,000 miles or as needed
Fuel Pressure Regulator
- Type
- Integrated into high-pressure fuel pump
- Pressure Range
- 50-220 bar (725-3190 psi)
- Tolerance
- +/- 5 bar (72.5 psi)
- Part Number
- 13 51 7 586 614
Fuel Tank
- Material
- High-density polyethylene (HDPE)
- Capacity
- 18.5 gallons (70 liters)
- Vent System
- Closed-loop evaporative emission control system
- Tank Sensor Part Number
- 16 14 7 586 615
- Tank Pressure Sensor Part Number
- 16 14 7 586 616
Fuel Quality Sensor
- Type
- Integrated fuel quality sensor
- Function
- Detects ethanol content and fuel contamination
- Part Number
- 13 62 7 586 617
- Operating Temperature
- -40°C to 120°C (-40°F to 248°F)
- Output Signal
- 0.5-4.5V analog signal
Fuel System Diagnostics
- Diagnostic Tool
- BMW ISTA or compatible OBD-II scanner
- Common Codes
-
- P0171 - System too lean
- P0172 - System too rich
- P0087 - Fuel rail/system pressure too low
- P0191 - Fuel rail pressure sensor circuit range/performance
- Diagnostic Procedure
- Check fuel pressure, injector flow rates, and fuel quality sensor readings
- Tolerance Check
- Fuel pressure within +/- 5 bar of specified range
Fuel System Maintenance
- Fuel Filter Replacement interval
- Every 60,000 miles or 4 years
- injector Cleaning Interval
- Every 30,000 miles or as needed
- Fuel Tank Cleaning Interval
- Every 100,000 miles or as needed
- Fuel System inspection Interval
- Every 15,000 miles or annually
- Recommended Fuel Additive
- BMW Fuel System Cleaner (Part Number: 83 19 2 209 784)
Fuel System Safety
- Fire Hazard Prevention
- Avoid overfilling fuel tank
- Fuel Leak Detection
- Inspect fuel lines and connections regularly
- Fuel Pressure Relief
- Depressurize fuel system before servicing
- Safety Equipment
- Use BMW-approved fuel system service tools
Fuel System Operational Limits
- Maximum Fuel Pressure
- 220 bar (3190 psi)
- Minimum Fuel Pressure
- 50 bar (725 psi)
- Fuel Temperature Limit
- 60°C (140°F)
- Ethanol Content Limit
- 10% (E10)
- Fuel Contamination Limit
- Less than 0.5% water content
Fuel System Service Information Service
Detailed service requirements and schedules for the fuel system
- Inspect fuel lines and connections for leaks
- Check fuel pressure and injector performance
- Inspect fuel quality sensor readings
Use BMW-approved diagnostic tools for accurate readings
- Clean fuel injectors
- Inspect fuel filter condition
- Check fuel tank vent system
Replace fuel filter if necessary
- Replace fuel filter
- Inspect fuel pump performance
- Check fuel pressure regulator operation
Use BMW-approved replacement parts
- Inspect and clean fuel tank
- Replace fuel quality sensor if necessary
- Check fuel system for contamination
Perform thorough fuel system inspection
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What type of fuel is recommended for the 2018-Present BMW 640i?
What type of fuel is recommended for the 2018-Present BMW 640i?
The 2018-Present BMW 640i requires premium unleaded gasoline with a minimum octane rating of 91 AKI (Anti-Knock Index). For optimal performance, BMW recommends using fuel with an octane rating of 93 AKI.
Q2 Can I use ethanol-blended fuel in the BMW 640i?
Can I use ethanol-blended fuel in the BMW 640i?
Yes, the BMW 640i is compatible with ethanol-blended fuels containing up to 10% ethanol (E10). However, fuels with higher ethanol concentrations, such as E15 or E85, are not recommended as they may cause engine damage and void the warranty.
Q3 What is the fuel tank capacity of the BMW 640i?
What is the fuel tank capacity of the BMW 640i?
The fuel tank capacity of the 2018-Present BMW 640i is 18.5 gallons (70 liters). This provides an estimated driving range of approximately 400-500 miles depending on driving conditions and fuel efficiency.
Q4 What is the fuel economy of the BMW 640i?
What is the fuel economy of the BMW 640i?
The 2018-Present BMW 640i achieves an EPA-estimated fuel economy of 20 MPG in the city and 29 MPG on the highway. Combined fuel economy is approximately 23 MPG, though actual results may vary based on driving habits and conditions.
Q5 Does the BMW 640i require any fuel additives?
Does the BMW 640i require any fuel additives?
BMW does not recommend the use of aftermarket fuel additives. The vehicle is designed to operate efficiently with high-quality fuel meeting the specified octane rating. Using additives may affect engine performance and void the warranty.
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 SoonLearn about proper fuel system maintenance, including fuel filter replacement and injector cleaning, to ensure optimal performance and longevity.
Understanding Octane Ratings
Coming SoonA detailed explanation of octane ratings and their importance in maintaining engine performance and preventing knocking.
BMW Warranty and Fuel Requirements
Coming SoonInformation on how using improper fuel types or additives can impact your BMW warranty coverage.
Ethanol-Blended Fuels and Your BMW
Coming SoonA guide to understanding the effects of ethanol-blended fuels on your BMW's engine and fuel system.
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