BMW 340i 2019-present

BMW 340i 2019-present Fuel System Specifications

Detailed technical guide for the 2019-Present BMW 340i fuel system, including fuel specifications, component details, and maintenance procedures. Essential for technicians and enthusiasts.

Updated Oct 14, 2023

Overview Specifications

Comprehensive description of the fuel specifications for the 2019-Present BMW 340i, including key features, measurements, and technical details. This section provides detailed information on fuel requirements, system components, and performance specifications to ensure optimal vehicle operation.

How to Use

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

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

Key Specifications

Fuel Type

Premium unleaded gasoline (91 AKI min)

Fuel Tank Capacity

15.8 gallons (60 liters)

Injection Pressure

Up to 200 bar (2900 psi)

EPA Combined MPG

26 mpg

Emissions Standard

Euro 6d-TEMP / EPA Tier 3

Available Specifications

Fuel Requirements

This section outlines the fuel type, octane rating, and additives recommended for the BMW 340i to ensure optimal engine performance and longevity.

Fuel Type and Octane Rating

Premium unleaded gasoline with a minimum octane rating of 91 AKI (Anti-Knock Index)
Recommended octane rating of 93 AKI for maximum performance
Use of lower octane fuel may result in reduced engine performance and efficiency
Avoid using gasoline with more than 10% ethanol (E10)

Fuel Additives

BMW-approved fuel additives are recommended for maintaining fuel system cleanliness
Avoid using aftermarket additives not approved by BMW
Additives should not contain metallic compounds or manganese-based substances
Regular use of approved additives can help prevent carbon buildup

Note: Using non-approved additives may void the vehicle's warranty.

Fuel System Components

This section details the key components of the BMW 340i's fuel system, including the fuel tank, fuel pump, and injection system.

Fuel Tank

Fuel tank capacity: 15.8 gallons (60 liters)
Material: High-density polyethylene (HDPE) for durability and corrosion resistance
Includes an integrated fuel level sensor for accurate fuel monitoring
Designed to minimize fuel sloshing and evaporation

High-Precision Fuel Injection

Direct fuel injection system with piezo injectors
Injection pressure: Up to 200 bar (2900 psi)
Precision-controlled fuel delivery for optimal combustion
Supports stratified charge operation for improved efficiency

Note: The injection system is calibrated for precise fuel delivery under all driving conditions.

Fuel Efficiency and Emissions

This section covers the fuel efficiency ratings and emissions standards for the BMW 340i, including EPA estimates and compliance with environmental regulations.

Fuel Efficiency

EPA-estimated fuel economy: 22 mpg city / 33 mpg highway
Combined fuel economy: 26 mpg
Efficient Dynamics technology optimizes fuel consumption
Auto Start-Stop function reduces fuel consumption during idle

Emissions Compliance

Complies with Euro 6d-TEMP and EPA Tier 3 emissions standards
Equipped with a particulate filter for reduced particulate emissions
NOx emissions are minimized through advanced exhaust gas recirculation (EGR)
Onboard diagnostics (OBD) monitor emissions system performance

Note: Regular maintenance is required to ensure continued emissions compliance.

Search Specifications

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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 minimum) with reduced performance

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

Octane Rating: 91 AKI (95 RON) minimum for optimal performance

Fuel System

Fuel Delivery: Direct injection

Fuel Pump Pressure: 200-500 psi (13.8-34.5 bar)

Fuel Filter Part Number: 13-32-7-566-327

Fuel injector Part Number: 13-62-7-852-123

Fuel Tank Capacity: 15.8 gallons (60 liters)

Fuel Quality

Sulfur Content: Maximum 10 ppm

Additives: BMW-approved fuel additives recommended

Contaminants: Avoid fuels with high levels of water, dirt, or other contaminants

Storage: Use fuel within 30 days for optimal performance

Fuel Economy

City: 22 mpg

Highway: 32 mpg

Combined: 26 mpg

Co2 Emissions: 200 g/km

Fuel Pressure Specifications

Idle Pressure: 50 psi (3.45 bar)

Operating Pressure: 72 psi (4.96 bar)

Maximum Pressure: 100 psi (6.89 bar)

Tolerance: +/- 5 psi (0.34 bar)

Fuel Tank Specifications

Material: High-density polyethylene

Capacity: 15.8 gallons (60 liters)

Vent System: Closed-loop evaporative emission control system

Pressure Relief Valve: 2.9 psi (0.2 bar) opening pressure

Fuel injector Specifications

Flow Rate: 200 cc/min at 43.5 psi (3 bar)

Spray Pattern: Multi-hole design

Resistance: 12-16 ohms

Operating Voltage: 12V

Fuel Pump Specifications

Type: Electric in-tank fuel pump

Flow Rate: 150 liters/hour at 5 bar

Operating Voltage: 12V

Current Draw: 5-7 amps

Part Number: 16-14-7-181-456

Fuel System Maintenance

Fuel Filter Replacement interval: Every 30,000 miles or 24 months

Fuel injector Cleaning Interval: Every 60,000 miles or 48 months

Fuel Tank inspection Interval: Every 100,000 miles or 84 months

Fuel Pump inspection Interval: Every 100,000 miles or 84 months

Fuel System Diagnostics

Diagnostic Tool: BMW ISTA diagnostic software

Common Codes

P0171
P0174
P0087
P0191

Pressure Test: Required for codes P0087 and P0191

Leak Test: Required for codes P0171 and P0174

Service Information Service

Detailed service requirements and schedules for the fuel system

30,000

Replace fuel filter
Inspect fuel lines for leaks
Check fuel pump operation

Use only BMW-approved parts and fluids

60,000

Clean fuel injectors
Inspect fuel tank for damage
Check fuel pressure regulator

Perform fuel system diagnostic if any issues are detected

100,000

Inspect fuel pump
Replace fuel injectors if necessary
Check fuel tank vent system

Replace any worn or damaged components immediately

Frequently Asked Questions

Find answers to common questions about torque specifications

What type of fuel is recommended for the 2019-Present BMW 340i?

The BMW 340i 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.

Can I use ethanol-blended fuel in the BMW 340i?

Yes, the BMW 340i can use ethanol-blended fuel with up to 10% ethanol (E10). However, fuels with higher ethanol content, such as E15 or E85, are not recommended as they may cause engine damage and void the warranty.

What is the fuel tank capacity of the BMW 340i?

The BMW 340i has a fuel tank capacity of 15.8 gallons (60 liters). This allows for a driving range of approximately 400-500 miles depending on driving conditions and fuel efficiency.

What is the fuel economy of the BMW 340i?

The BMW 340i achieves an EPA-estimated fuel economy of 22 mpg in the city and 32 mpg on the highway. Combined fuel economy is approximately 26 mpg. Actual mileage may vary based on driving habits and conditions.

Does the BMW 340i require any fuel additives?

BMW does not recommend the use of fuel additives for the 340i. The engine is designed to operate efficiently with premium unleaded gasoline. Using additives may affect performance and could void the warranty.

What happens if I use lower octane fuel in the BMW 340i?

Using fuel with an octane rating lower than 91 AKI may cause engine knocking, reduced performance, and increased emissions. The engine control unit (ECU) may adjust timing to prevent damage, but this can lead to decreased fuel efficiency and power output.

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 Overview

Coming Soon

Detailed guide on the fuel system components and maintenance for the BMW 340i, including fuel injectors, fuel pump, and fuel filter.

Premium Fuel Benefits

Coming Soon

Explains the advantages of using premium unleaded gasoline in high-performance vehicles like the BMW 340i, including improved engine performance and longevity.

Ethanol-Blended Fuel Guide

Coming Soon

Information on the effects of ethanol-blended fuels on BMW engines, including compatibility and potential risks.

Fuel Efficiency Tips

Coming Soon

Practical tips to maximize fuel efficiency in the BMW 340i, including driving habits, maintenance, and fuel selection.

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