BMW 550i 2003-2010 Exhaust Specifications
Detailed technical specifications and documentation for the 2003-2010 BMW 550i exhaust system, including OEM parts, torque values, and installation guidelines. Ideal for technicians and enthusiasts.
Overview Specifications
Comprehensive description of the exhaust specifications for the 2003-2010 BMW 550i, including key features, measurements, and technical details. This section covers the exhaust system's design, components, and performance specifications.
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 exhaust documentation sections using the table of contents or by scrolling through the major sections and subsections.
Key Specifications
Exhaust Pipe Diameter
2.5 inches (63.5 mm)
Catalytic Converter Efficiency
95% reduction in harmful emissions
Muffler Weight
12.5 lbs (5.67 kg)
Maximum Backpressure
1.2 psi (8.27 kPa)
Idle Sound Level
45 dB
Available Specifications
Exhaust System Design
Details about the overall design and layout of the exhaust system, including materials, routing, and integration with the vehicle's chassis.
Exhaust System Design
Details about the overall design and layout of the exhaust system, including materials, routing, and integration with the vehicle's chassis.
Exhaust Pipe Routing
- Dual exhaust system with symmetrical routing
- Stainless steel construction for durability
- Pipe diameter: 2.5 inches (63.5 mm)
- Integrated heat shields for thermal management
Catalytic Converter Configuration
- Dual catalytic converters for each exhaust bank
- Ceramic honeycomb substrate with precious metal coating
- Oxygen sensor placement: pre- and post-catalytic converter
- Emissions compliance: Euro 4 standards
Note: Ensure proper alignment of oxygen sensors during installation to avoid fault codes.
Muffler and Resonator Specifications
Technical details about the muffler and resonator components, including their design, materials, and performance characteristics.
Muffler and Resonator Specifications
Technical details about the muffler and resonator components, including their design, materials, and performance characteristics.
Muffler Design
- Chambered design for noise reduction
- Stainless steel casing with internal baffles
- Inlet and outlet diameter: 2.5 inches (63.5 mm)
- Weight: 12.5 lbs (5.67 kg)
Resonator Functionality
- Helmholtz resonator for drone reduction
- Positioned between catalytic converter and muffler
- Material: aluminized steel
- Length: 18 inches (457 mm)
Note: Resonator removal may increase exhaust drone at certain RPM ranges.
Exhaust Performance Specifications
Performance-related details of the exhaust system, including backpressure, flow rates, and sound levels.
Exhaust Performance Specifications
Performance-related details of the exhaust system, including backpressure, flow rates, and sound levels.
Backpressure and Flow Rates
- Maximum backpressure: 1.2 psi (8.27 kPa)
- Exhaust flow rate: 250 CFM (cubic feet per minute)
- Optimized for V8 engine performance
- Pressure drop across catalytic converter: 0.5 psi (3.45 kPa)
Sound Levels
- Idle sound level: 45 dB
- Full throttle sound level: 85 dB
- Sound tuning for sporty yet refined tone
- Complies with EU noise regulations
Note: Sound levels measured at 1 meter from the exhaust tip.
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Component Specifications
General Specifications
- Material
- Stainless steel
- System Type
- Dual exhaust with cross-pipe
- Emission Compliance
- Euro 4
- Part Number
- 18307585273
- Weight
- 32.5 kg
Exhaust Manifold
- Material
- Cast iron
- Bolt Torque
- 25 Nm
- Gasket Part Number
- 11627548921
- Heat Shield Part Number
- 11627548922
- Notes
- Ensure proper alignment during installation to avoid leaks
Catalytic Converter
- Type
- Three-way catalytic converter
- Part Number
- 18307585274
- Efficiency
- >95%
- Temperature Range
- 400-800°C
- Replacement interval
- 120,000 miles
- Notes
- Monitor for clogging or damage to prevent engine performance issues
Resonator
- Material
- Stainless steel
- Part Number
- 18307585275
- Diameter
- 70 mm
- Length
- 450 mm
- Notes
- Reduces exhaust noise and drone
Muffler
- Material
- Stainless steel
- Part Number
- 18307585276
- Diameter
- 80 mm
- Length
- 600 mm
- Sound Level
- 72 dB at 3000 RPM
- Notes
- Designed for optimal noise reduction and performance
Exhaust Pipes
- Material
- Stainless steel
- Diameter
- 70 mm
- Wall Thickness
- 1.5 mm
- Part Number
- 18307585277
- Notes
- Ensure proper alignment and secure mounting to prevent vibrations
Oxygen Sensors
- Type
- Wideband zirconia sensor
- Part Number
- 11787548923
- Location
- Pre-catalytic and post-catalytic
- Operating Temperature
- Up to 930°C
- Replacement interval
- 100,000 miles
- Notes
- Critical for maintaining optimal air-fuel ratio and emissions
Exhaust Clamps And Hangers
- Material
- Stainless steel
- Clamp Part Number
- 18307585278
- Hanger Part Number
- 18307585279
- Torque Specification
- 10 Nm
- Notes
- Regularly inspect for corrosion and wear
Exhaust Tips
- Material
- Chrome-plated stainless steel
- Part Number
- 18307585280
- Diameter
- 90 mm
- Length
- 150 mm
- Notes
- Purely aesthetic, no functional impact on exhaust performance
Diagnostic Specifications
- Backpressure Limit
- 0.5 bar
- Leak Test Procedure
- Use smoke machine or soap solution
- Emission Test Standards
- OBD-II compliant
- Notes
- Regularly check for leaks, blockages, and sensor functionality
Service Information Service
Detailed service requirements and schedules for the exhaust system
- Inspect exhaust system for leaks and damage
- Check oxygen sensor functionality
- Tighten all clamps and hangers
Ensure all components are securely fastened and free of corrosion
- Replace oxygen sensors if necessary
- Inspect catalytic converter for clogging
- Check exhaust hangers for wear
Monitor exhaust performance and emissions
- Replace catalytic converter if efficiency drops below 90%
- Inspect and replace exhaust pipes if corroded
- Check resonator and muffler for damage
Perform a full exhaust system inspection and replace worn components
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What is the exhaust system configuration for the BMW 550I (2003-2010)?
What is the exhaust system configuration for the BMW 550I (2003-2010)?
The BMW 550I (2003-2010) features a dual exhaust system with a 2.5-inch diameter for each pipe. The system includes a catalytic converter, muffler, and exhaust tips made from stainless steel for durability.
Q2 What material is used for the exhaust pipes?
What material is used for the exhaust pipes?
The exhaust pipes are constructed from high-grade stainless steel, designed to withstand high temperatures and corrosion, ensuring longevity and performance.
Q3 How often should the exhaust system be inspected?
How often should the exhaust system be inspected?
It is recommended to inspect the exhaust system every 12 months or 10,000 miles, whichever comes first. Regular inspections help identify potential issues like leaks, corrosion, or damage to the catalytic converter.
Q4 Can aftermarket exhaust systems affect vehicle performance?
Can aftermarket exhaust systems affect vehicle performance?
Aftermarket exhaust systems can alter performance, including changes in fuel efficiency, engine power, and emissions. It is advisable to use BMW-approved or OEM parts to maintain optimal performance and warranty compliance.
Q5 What are the emissions standards for the BMW 550I exhaust?
What are the emissions standards for the BMW 550I exhaust?
The BMW 550I exhaust system complies with Euro 4 emissions standards, featuring a catalytic converter that reduces CO, NOx, and HC emissions to meet environmental regulations.
Q6 Is there a recommended maintenance procedure for the exhaust system?
Is there a recommended maintenance procedure for the exhaust system?
Maintenance includes checking for leaks, ensuring the catalytic converter is functioning correctly, and cleaning the exhaust tips. Always refer to the BMW service manual for detailed procedures.
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 Exhaust System Maintenance Guide
Coming SoonDetailed guide on maintaining the BMW 550I exhaust system, including inspection schedules and common troubleshooting tips.
Catalytic Converter Function and Care
Coming SoonExplains the role of the catalytic converter in the BMW 550I exhaust system and how to ensure it remains effective.
Stainless Steel Exhaust Pipe Benefits
Coming SoonInformation on the advantages of using stainless steel for exhaust pipes and how it impacts vehicle performance and durability.
Euro 4 Emissions Standards Overview
Coming SoonOverview of the Euro 4 emissions standards and how the BMW 550I exhaust system complies with these regulations.
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Technical Information
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