BMW 850i 2018-present

BMW 850i 2018-present Fuel System Specifications

Comprehensive technical guide for the 2018-Present BMW 850I fuel system, including fuel type, injectors, pressure, delivery system, and maintenance recommendations.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the fuel specifications for the 2018-Present BMW 850i, including key features, measurements, and technical details. This section provides essential 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 'fuel type,' 'octane rating,' or 'fuel system pressure.'

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 Type

Premium unleaded gasoline (91-93 AKI)

Fuel Tank Capacity

68 liters (18 gallons)

Fuel System Pressure

200 bar (2900 psi)

CO2 Emissions

239 g/km

Available Specifications

Fuel Requirements

This section outlines the fuel type, octane rating, and additives recommended for the BMW 850i 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 ethanol blends up to 10% (E10) is acceptable
Avoid using fuels with methanol or MMT (Methylcyclopentadienyl Manganese Tricarbonyl)

Fuel Additives

BMW-approved fuel additives are recommended for maintaining fuel system cleanliness
Avoid aftermarket additives not approved by BMW
Additives should not contain metal-based compounds
Use of detergents to prevent carbon buildup is encouraged

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

Fuel System Components

This section details the key components of the BMW 850i fuel system, including the fuel pump, injectors, and pressure specifications.

Fuel Pump Specifications

High-pressure fuel pump with a maximum pressure of 200 bar (2900 psi)
Electric fuel pump located inside the fuel tank
Fuel pump flow rate of 120 liters per hour (31.7 gallons per hour)
Designed for low-noise operation and high reliability

Fuel Injectors

Direct injection system with piezo-electric injectors
Injector flow rate of 20 cc per second at 200 bar
Precision-engineered for optimal fuel atomization
Designed to withstand high temperatures and pressures

Fuel System Performance

This section covers the performance metrics of the BMW 850i fuel system, including fuel consumption, emissions, and efficiency.

Fuel Consumption

Combined fuel consumption: 10.5 L/100 km (22.4 mpg)
City fuel consumption: 12.8 L/100 km (18.4 mpg)
Highway fuel consumption: 8.9 L/100 km (26.4 mpg)
Fuel tank capacity: 68 liters (18 gallons)

Emissions and Efficiency

Complies with Euro 6d-TEMP emissions standards
CO2 emissions: 239 g/km
Equipped with a particulate filter for reduced emissions
Optimized for low fuel consumption and high efficiency

Note: Regular maintenance is required to maintain emissions compliance.

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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)

Notes: Using fuel with higher ethanol content may void warranty and cause engine damage

Fuel System

Fuel Delivery: Direct injection

Fuel Pump Pressure: 5.8 bar (84 psi)

Fuel Filter Part Number: 13-32-7-581-546

injector Part Number: 13-62-7-850-123

Notes: High-pressure fuel system requires precise maintenance and diagnostics

Fuel Tank

Capacity: 68 liters (18 gallons)

Material: Plastic with integrated fuel pump module

Part Number: 16-11-7-850-789

Ventilation System: Closed-loop evaporative emission control system

Notes: Tank includes anti-slosh baffles and integrated fuel level sensor

Fuel Quality Requirements

Octane Rating: Minimum 91 AKI (95 RON)

Sulfur Content: Maximum 10 ppm

Additives: BMW-approved fuel additives recommended

Notes: Low-quality fuel may cause knocking, reduced performance, and increased emissions

Fuel Economy

City: 18 mpg (13.1 L/100km)

Highway: 26 mpg (9.0 L/100km)

Combined: 21 mpg (11.2 L/100km)

Notes: Economy varies based on driving conditions and fuel quality

Emissions

Emission Standard: Euro 6d-TEMP / Tier 3 Bin 125

Catalytic Converter Part Number: 18-30-7-850-456

Oxygen Sensor Part Number: 11-78-7-850-321

Notes: System includes dual oxygen sensors for precise air-fuel ratio control

Operational Parameters

Idle Fuel Pressure: 3.5 bar (51 psi)

Maximum Fuel Pressure: 200 bar (2900 psi)

Fuel Temperature Limit: 60°C (140°F)

Notes: Exceeding operational limits may trigger engine fault codes

Maintenance

Fuel Filter Replacement interval: Every 60,000 miles or 48 months

Fuel injector Cleaning Interval: Every 30,000 miles or 24 months

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

Notes: Follow BMW-recommended service intervals for optimal performance

Diagnostics

Common Fault Codes

P0171
P0172
P0087
P0191

Diagnostic Tool: BMW ISTA or compatible OBD-II scanner

Notes: Fault codes related to fuel system require immediate attention to prevent damage

Safety

Fuel Flash Point: -43°C (-45°F)

Fire Extinguisher Requirement: Class B

Handling Precautions: Avoid open flames and sparks during fuel system maintenance

Notes: Fuel system components are under high pressure; depressurize before servicing

Service Information Service

Detailed service requirements and schedules for the fuel system

30,000

Inspect fuel injectors
Check fuel pressure
Clean fuel injectors if necessary

Use BMW-approved cleaning solutions

60,000

Replace fuel filter
Inspect fuel lines and connections
Check fuel tank for leaks

Replace O-rings and seals during filter replacement

100,000

Inspect fuel pump
Check fuel tank ventilation system
Replace oxygen sensors if necessary

Perform full diagnostic scan before major service

Frequently Asked Questions

Find answers to common questions about torque specifications

What type of fuel is recommended for the 2018-Present BMW 850i?

The BMW 850i requires premium unleaded gasoline with an octane rating of 91 AKI (95 RON) or higher. Using lower octane fuel may result in reduced performance and efficiency.

What is the fuel tank capacity of the BMW 850i?

The fuel tank capacity of the BMW 850i is 18.0 gallons (68 liters). This allows for extended driving ranges, especially when combined with the vehicle's efficient engine technology.

Can I use ethanol-blended fuel in the BMW 850i?

Yes, the BMW 850i can use ethanol-blended fuels containing up to 10% ethanol (E10). However, fuels with higher ethanol concentrations, such as E15 or E85, are not recommended and may cause damage to the fuel system.

What is the fuel economy of the BMW 850i?

The BMW 850i achieves an EPA-estimated fuel economy of 18 mpg in the city and 25 mpg on the highway. Actual mileage may vary based on driving conditions, load, and maintenance.

Does the BMW 850i require any fuel additives?

BMW does not recommend the use of fuel additives for the 850i. The vehicle's engine and fuel system are designed to operate optimally with high-quality premium unleaded gasoline without additional additives.

What happens if I accidentally use diesel fuel in the BMW 850i?

Using diesel fuel in the BMW 850i, which is designed for gasoline, can cause severe engine damage. If this occurs, do not start the engine and contact a BMW-certified technician immediately for fuel system flushing and inspection.

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

Learn about proper fuel system maintenance, including fuel filter replacement and injector cleaning, to ensure optimal performance.

Understanding Octane Ratings

Coming Soon

A detailed explanation of octane ratings and their importance for high-performance engines like the BMW 850i.

BMW Genuine Parts Catalog

Coming Soon

Access the official catalog for BMW genuine fuel system components, ensuring compatibility and warranty compliance.

Fuel Efficiency Tips for BMW Vehicles

Coming Soon

Practical tips to maximize fuel efficiency and reduce emissions for your BMW 850i.

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