BMW 340i 2012-2018 Fuel System Specifications
Detailed technical guide for the 2012-2018 BMW 340I fuel system, including fuel type, pressure specifications, injector flow rates, and diagnostic procedures. Essential for technicians and enthusiasts.
Overview Specifications
Comprehensive description of the fuel specifications for the 2012-2018 BMW 340i, including key features, measurements, and technical details
How to Use
Use the search function to locate specific fuel specifications by entering keywords such as 'octane rating', 'fuel capacity', or 'fuel system pressure'.
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 Type
Premium unleaded (91 AKI/95 RON)
Fuel Tank Capacity
15.8 gallons (60 liters)
Fuel System Pressure
200 bar (2900 psi)
Combined Fuel Economy
26 mpg (9.0 L/100 km)
CO2 Emissions
199 g/km
Available Specifications
Fuel Type and Quality
Details about the recommended fuel type, quality standards, and octane rating for optimal performance.
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 (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
- Complies with ASTM D4814 (US) and EN 228 (Europe) standards
- Fuel must be free of contaminants such as water, dirt, or metal particles
- Use of additives is not recommended unless approved by BMW
- Fuel should be stored in clean, sealed containers to prevent contamination
Note: Using fuel that does not meet these standards may void the vehicle's warranty.
Fuel System Specifications
Technical details about the fuel system, including capacity, pressure, and injection system.
Fuel System Specifications
Technical details about the fuel system, including capacity, pressure, and injection system.
Fuel Tank Capacity
- Total fuel tank capacity: 15.8 gallons (60 liters)
- Reserve fuel capacity: 2.1 gallons (8 liters)
- Fuel gauge accuracy: ±5% under normal operating conditions
- Fuel tank material: High-density polyethylene (HDPE)
Fuel Injection System
- Direct fuel injection system with high-pressure injectors
- Fuel system pressure: 200 bar (2900 psi) at idle
- Injector flow rate: 15.5 cc/min at 3 bar pressure
- Electronic control unit (ECU) manages fuel delivery for optimal combustion
Note: The high-pressure fuel system requires specialized tools for maintenance and repair.
Fuel Efficiency and Emissions
Information about fuel consumption rates, emissions standards, and environmental impact.
Fuel Efficiency and Emissions
Information about fuel consumption rates, emissions standards, and environmental impact.
Fuel Consumption Rates
- City driving: 22 mpg (10.7 L/100 km)
- Highway driving: 33 mpg (7.1 L/100 km)
- Combined fuel economy: 26 mpg (9.0 L/100 km)
- CO2 emissions: 199 g/km (combined)
Emissions Compliance
- Meets Euro 6 and EPA Tier 3 emissions standards
- Equipped with a catalytic converter and particulate filter
- OBD-II compliant for emissions monitoring
- NOx emissions: 0.03 g/km (Euro 6 standard)
Note: Regular maintenance is required to ensure emissions compliance.
Search Specifications
Search by specification name, value, or description
Type to search through torque specifications. Results will appear below as you type.
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)
- Notes
- Using fuel with higher ethanol content may void warranty and damage the fuel system
Fuel Tank
- Capacity
- 15.8 gallons (60 liters)
- Material
- High-density polyethylene (HDPE)
- Part Number
- 16117348375
- Pressure Rating
- 3.0 bar (43.5 psi)
- Notes
- Includes integrated fuel pump and level sensor
Fuel Pump
- Type
- Electric in-tank fuel pump
- Flow Rate
- 120 liters per hour (LPH)
- Pressure
- 5.0 bar (72.5 psi)
- Voltage
- 12V DC
- Part Number
- 16146757689
- Notes
- Includes fuel filter and pressure regulator
Fuel injectors
- Type
- Direct injection (DI)
- Flow Rate
- 200 cc/min at 3.0 bar
- Part Number
- 13647596123
- Spray Pattern
- Multi-hole, cone-shaped
- Operating Pressure
- 200 bar (2900 psi)
- Notes
- High-pressure injectors for precise fuel delivery
Fuel Filter
- Type
- Integrated in-tank filter
- Micron Rating
- 10 microns
- Replacement interval
- Every 60,000 miles or 5 years
- Part Number
- 16146757689
- Notes
- Non-serviceable, replaced with fuel pump assembly
Fuel Pressure Sensor
- Type
- High-pressure sensor
- Range
- 0-250 bar (0-3625 psi)
- Accuracy
- ±1.5%
- Part Number
- 13627837945
- Notes
- Monitors fuel rail pressure for optimal engine performance
Fuel Rail
- Material
- Stainless steel
- Pressure Rating
- 250 bar (3625 psi)
- Part Number
- 13627596123
- Notes
- Designed for high-pressure direct injection systems
Fuel System Maintenance
- injector Cleaning Interval
- Every 30,000 miles
- Fuel Additive Recommendation
- BMW Fuel System Cleaner (part number 82141467704)
- Notes
- Regular use of fuel additives helps prevent carbon buildup
Fuel System Diagnostics
- Diagnostic Tool
- BMW ISTA/D 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
- Notes
- Diagnostic codes should be cross-referenced with live data for accurate troubleshooting
Fuel System Safety
- Fire Hazard Warning
- Always disconnect the battery before servicing the fuel system
- Pressure Relief Procedure
- Depressurize the fuel system before disconnecting any components
- Notes
- Use only BMW-approved tools and procedures for fuel system repairs
Service Information Service
Detailed service requirements and schedules for the fuel system
- Inspect fuel lines and connections for leaks
- Check fuel injectors for proper operation
- Use BMW Fuel System Cleaner
Regular maintenance ensures optimal fuel system performance
- Replace fuel filter (integrated with fuel pump)
- Inspect fuel tank for damage or corrosion
- Check fuel pressure sensor operation
Non-serviceable components may require replacement
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What type of fuel is recommended for the 2012-2018 BMW 340i?
What type of fuel is recommended for the 2012-2018 BMW 340i?
The BMW 340i requires premium unleaded gasoline with an octane rating of 91 or higher (AKI). Using lower octane fuel may result in reduced performance and efficiency.
Q2 What is the fuel tank capacity of the BMW 340i?
What is the fuel tank capacity of the BMW 340i?
The fuel tank capacity of the 2012-2018 BMW 340i is 15.8 gallons (60 liters).
Q3 Can I use ethanol-blended fuel in the BMW 340i?
Can I use ethanol-blended fuel in the BMW 340i?
Yes, the BMW 340i can use ethanol-blended fuels containing up to 10% ethanol (E10). However, fuels with higher ethanol content (e.g., E15 or E85) are not recommended and may cause engine damage.
Q4 What is the fuel economy of the BMW 340i?
What is the fuel economy of the BMW 340i?
The 2012-2018 BMW 340i has an EPA-estimated fuel economy of 22 mpg in the city and 33 mpg on the highway, depending on driving conditions and transmission type.
Q5 Does the BMW 340i require fuel additives?
Does the BMW 340i require fuel additives?
BMW does not recommend the use of fuel additives unless specifically approved by BMW. The vehicle's fuel system is designed to operate optimally with high-quality fuel without additives.
Q6 What happens if I use diesel fuel in the BMW 340i?
What happens if I use diesel fuel in the BMW 340i?
Using diesel fuel in the BMW 340i, which is designed for gasoline, can cause severe engine damage. If diesel is accidentally added, do not start the engine and contact a BMW service center immediately.
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 SoonDetailed guide on maintaining the fuel system, including fuel filter replacement and injector cleaning procedures.
BMW Approved Fuel Types
Coming SoonOfficial BMW documentation listing approved fuel types and octane ratings for the 340i.
Fuel Efficiency Tips for BMW 340i
Coming SoonTips and best practices for maximizing fuel efficiency and performance in the BMW 340i.
BMW Warranty and Fuel Usage
Coming SoonInformation on how using non-recommended fuels can impact your BMW warranty coverage.
About the Author
Expert automotive knowledge and experience
'/%3E%3Cpath d='M60 30a20 20 0 1 1 0 40 20 20 0 0 1 0-40zm0 45c16.5 0 30 7.5 30 16.8V100H30v-8.2c0-9.3 13.5-16.8 30-16.8z' fill='%23404040'/%3E%3C/svg%3E)
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
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.