BMW 550i 2011-2016

BMW 550i 2011-2016 Exhaust Specifications

Detailed technical specifications and documentation for the 2011-2016 BMW 550i exhaust system. Learn about exhaust components, torque specs, maintenance, and troubleshooting for the N63 engine.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the exhaust specifications for the 2011-2016 BMW 550i, including key features, measurements, and technical details. This documentation covers the exhaust system's design, components, and performance specifications to ensure proper maintenance and repair.

How to Use

Use the search function to locate specific exhaust specifications by entering keywords such as 'catalytic converter,' 'muffler,' or 'exhaust pipe diameter.'

Navigate through the documentation using the table of contents or section headers. Each section is organized by major components and their respective technical details.

Key Specifications

Exhaust System Length

4.2 meters (13.8 feet)

Primary Pipe Diameter

70 mm (2.75 inches)

Catalytic Converter Efficiency

95%

Muffler Noise Reduction

25 dB at 3000 RPM

Tailpipe Diameter

90 mm (3.54 inches)

Available Specifications

Exhaust System Overview

This section provides an overview of the BMW 550i's exhaust system, including its layout, materials, and key components.

System Layout

Dual exhaust system with two tailpipes
Stainless steel construction for durability
Integrated catalytic converters for emissions control
Resonators and mufflers for noise reduction
Total system length: 4.2 meters (13.8 feet)

Materials and Construction

Primary material: 409-grade stainless steel
Heat-resistant coatings for high-temperature areas
Welded joints for leak-free performance
Corrosion-resistant clamps and brackets
Weight: 28.5 kg (62.8 lbs)

Note: The use of stainless steel ensures longevity and resistance to rust in various weather conditions.

Catalytic Converters

This section details the catalytic converters, including their specifications, placement, and performance metrics.

Primary Catalytic Converter

Located close to the exhaust manifold
Ceramic honeycomb substrate with platinum coating
Flow rate: 450 CFM (cubic feet per minute)
Operating temperature: 400°C to 800°C (752°F to 1472°F)
Emissions reduction efficiency: 95%

Secondary Catalytic Converter

Positioned downstream of the primary converter
Metallic substrate for improved durability
Flow rate: 300 CFM (cubic feet per minute)
Operating temperature: 300°C to 600°C (572°F to 1112°F)
Emissions reduction efficiency: 90%

Note: The secondary converter further reduces emissions before exhaust gases exit the system.

Mufflers and Resonators

This section covers the mufflers and resonators, including their design, materials, and noise reduction capabilities.

Muffler Specifications

Dual-chamber design for optimal noise reduction
Internal baffles to disrupt sound waves
Material: 409-grade stainless steel
Dimensions: 60 cm x 30 cm x 20 cm (23.6 in x 11.8 in x 7.9 in)
Noise reduction: 25 dB at 3000 RPM

Resonator Specifications

Helical resonator design for low-frequency noise cancellation
Material: 409-grade stainless steel
Dimensions: 40 cm x 15 cm x 15 cm (15.7 in x 5.9 in x 5.9 in)
Noise reduction: 15 dB at 2000 RPM
Weight: 4.5 kg (9.9 lbs)

Note: Resonators are critical for eliminating drone and low-frequency exhaust noise.

Exhaust Pipes and Connections

This section provides details on the exhaust pipes, including their diameters, materials, and connection points.

Primary Exhaust Pipes

Diameter: 70 mm (2.75 inches)
Material: 409-grade stainless steel
Wall thickness: 1.5 mm (0.059 inches)
Total length: 2.5 meters (8.2 feet)
Flexible joints for thermal expansion

Tailpipes

Diameter: 90 mm (3.54 inches)
Material: 304-grade stainless steel
Chrome-plated finish for aesthetics
Length: 50 cm (19.7 inches)
Angled design for improved exhaust flow

Note: The chrome-plated tailpipes enhance the vehicle's visual appeal while maintaining durability.

Search Specifications

Search by specification name, value, or description

Component Specifications

General information

Vehicle Model: 2011-2016 BMW 550i

Engine Type: N63 4.4L V8 TwinPower Turbo

Exhaust Type: Dual exhaust system with catalytic converters

Material: Stainless steel

Emission Standard: EU5 / ULEV II

Exhaust Manifold

Part Number: 11627586945

Material: Cast iron

Bolt Torque: 22 Nm

Gasket Part Number: 11627586946

Heat Shield Material: Aluminum

Catalytic Converters

Part Number: 18307585291

Type: Two-way catalytic converter

Location: Integrated into exhaust manifold

Efficiency: >95%

Temperature Range: 400°C to 800°C

Warranty: 8 years or 80,000 miles

Exhaust Pipes

Diameter: 70 mm

Material: Stainless steel

Wall Thickness: 1.5 mm

Flex Pipe Part Number: 18307585292

Clamp Part Number: 18307585293

Mufflers

Part Number: 18307585294

Type: Dual-chamber muffler

Material: Stainless steel

Sound Level: 72 dB at 3000 RPM

Weight: 12.5 kg

Exhaust Tips

Part Number: 18307585295

Diameter: 90 mm

Material: Chrome-plated stainless steel

Finish: Polished

installation Torque: 15 Nm

Oxygen Sensors

Upstream Part Number: 11787586947

Downstream Part Number: 11787586948

Type: Wideband zirconia sensor

Operating Temperature: -40°C to 900°C

Replacement interval: 100,000 miles

Exhaust Mounts

Rubber Mount Part Number: 18307585296

Bracket Part Number: 18307585297

Torque Spec: 25 Nm

Material: Reinforced rubber and steel

Vibration Damping: >90%

Exhaust Valve

Part Number: 18307585298

Type: Electronically controlled flap

Operation: Variable exhaust sound

Actuator Part Number: 18307585299

Voltage: 12V DC

Current Draw: 0.5A

Emission Control

System Type: Secondary air injection

Part Number: 11787586949

Operation: Reduces cold-start emissions

Pressure Sensor Part Number: 11787586950

Flow Rate: 20 L/min at 3000 RPM

Service Information Service

Detailed service requirements and schedules for the exhaust system

30,000

Inspect exhaust system for leaks and damage
Check oxygen sensor operation
Tighten all exhaust clamps and mounts

Replace gaskets if any leaks are detected

60,000

Replace oxygen sensors
Inspect catalytic converters for efficiency
Check exhaust valve operation

Use OEM parts for replacements

100,000

Replace catalytic converters if efficiency drops below 90%
Inspect and replace exhaust mounts if necessary
Check entire exhaust system for corrosion

Perform emission system diagnostic

Frequently Asked Questions

Find answers to common questions about torque specifications

What is the diameter of the exhaust pipes on the 2011-2016 BMW 550i?

The exhaust pipes on the 2011-2016 BMW 550i have an outer diameter of 70mm (2.75 inches). This measurement is consistent across both the left and right exhaust pipes.

What type of catalytic converter is used in the 2011-2016 BMW 550i exhaust system?

The 2011-2016 BMW 550i is equipped with a dual catalytic converter system, featuring two high-flow, three-way catalytic converters. These converters are designed to reduce emissions of CO, NOx, and hydrocarbons, meeting Euro 5 emission standards.

What is the material composition of the exhaust system on the 2011-2016 BMW 550i?

The exhaust system on the 2011-2016 BMW 550i is primarily constructed from stainless steel, with specific components such as the muffler and tailpipes featuring a polished chrome finish for durability and aesthetic appeal.

How often should the exhaust system be inspected on a 2011-2016 BMW 550i?

BMW recommends inspecting the exhaust system every 30,000 miles or during routine maintenance intervals. Special attention should be given to the condition of the hangers, gaskets, and welds to ensure there are no leaks or structural issues.

Can aftermarket exhaust systems void the warranty on a 2011-2016 BMW 550i?

Installing an aftermarket exhaust system may void the warranty on the 2011-2016 BMW 550i if it is determined that the aftermarket part caused damage to the vehicle. It is recommended to consult with a BMW dealership or authorized service center before making modifications.

What is the backpressure specification for the 2011-2016 BMW 550i exhaust system?

The backpressure specification for the 2011-2016 BMW 550i exhaust system should not exceed 0.5 psi at idle and 2.5 psi at full throttle. Excessive backpressure can indicate a blockage or restriction in the exhaust system.

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 550i Exhaust System Service Manual

Coming Soon

Official BMW service manual detailing the exhaust system components, maintenance procedures, and troubleshooting tips for the 2011-2016 BMW 550i.

Exhaust System Inspection Checklist

Coming Soon

A comprehensive checklist for inspecting the exhaust system on the 2011-2016 BMW 550i, including visual inspection points, common issues, and recommended tools.

BMW Genuine Exhaust Parts Catalog

Coming Soon

Catalog of genuine BMW exhaust parts for the 2011-2016 BMW 550i, including part numbers, descriptions, and compatibility information.

Exhaust System Repair Guide

Coming Soon

Step-by-step guide for repairing common exhaust system issues on the 2011-2016 BMW 550i, including gasket replacement, pipe welding, and muffler installation.

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.