BMW 340i 2005-2011 Exhaust Specifications
Detailed technical specifications for the exhaust system of the 2005-2011 BMW 340I, including components, material details, and performance metrics.
Overview Specifications
Comprehensive description of the exhaust specifications for the 2005-2011 BMW 340I, including key features, measurements, and technical details. This section provides detailed information on 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
Up to 90%
Muffler Weight
15 lbs (6.8 kg)
Optimal Backpressure
1.5 psi (10.3 kPa)
Idle Sound Level
65 dB
Available Specifications
Exhaust System Design
This section covers the overall design and layout of the exhaust system, including the configuration of pipes, catalytic converters, and mufflers.
Exhaust System Design
This section covers the overall design and layout of the exhaust system, including the configuration of pipes, catalytic converters, and mufflers.
Exhaust Pipe Configuration
- Dual exhaust system with two separate pipes from the manifold to the muffler
- Pipe diameter: 2.5 inches (63.5 mm)
- Material: Stainless steel for corrosion resistance
- Bends and joints designed for optimal exhaust flow
Catalytic Converter Specifications
- Two catalytic converters, one per exhaust pipe
- Material: Ceramic substrate with a platinum coating
- Operating temperature range: 400°C to 800°C (752°F to 1472°F)
- Efficiency: Reduces harmful emissions by up to 90%
Note: Ensure the catalytic converters are inspected regularly for clogging or damage.
Muffler and Resonator
This section details the muffler and resonator components, including their design, materials, and performance characteristics.
Muffler and Resonator
This section details the muffler and resonator components, including their design, materials, and performance characteristics.
Muffler Design
- Chambered design for noise reduction
- Material: Aluminized steel for durability
- Dimensions: 24 inches (610 mm) in length, 8 inches (203 mm) in diameter
- Weight: 15 lbs (6.8 kg)
Resonator Specifications
- Located between the catalytic converter and muffler
- Material: Stainless steel
- Dimensions: 12 inches (305 mm) in length, 6 inches (152 mm) in diameter
- Function: Reduces specific exhaust frequencies for a smoother sound
Exhaust Performance
This section provides technical details on the exhaust system's performance, including backpressure, flow rates, and sound levels.
Exhaust Performance
This section provides technical details on the exhaust system's performance, including backpressure, flow rates, and sound levels.
Backpressure and Flow Rates
- Optimal backpressure: 1.5 psi (10.3 kPa)
- Exhaust flow rate: 250 CFM (cubic feet per minute)
- Designed to minimize power loss while maintaining emissions compliance
Sound Levels
- Idle sound level: 65 dB
- Full throttle sound level: 85 dB
- Sound tuning for a sporty yet refined exhaust note
Note: Sound levels measured at a distance of 1 meter from the exhaust tip.
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Component Specifications
General Specifications
- Material
- Stainless steel
- System Type
- Dual exhaust with dual catalytic converters
- Configuration
- Rear-mounted muffler with dual tailpipes
- Emission Standard
- Euro 4 compliant
- Weight
- 28.5 kg
Exhaust Manifold
- Material
- Cast iron
- Part Number
- 11627548051
- Bolt Torque
- 25 Nm
- Gasket Material
- Graphite
- Heat Shield Material
- Aluminum
Catalytic Converter
- Type
- Three-way catalytic converter
- Part Number
- 18307548053
- Substrate Material
- Ceramic
- Precious Metals
-
- Platinum
- Palladium
- Rhodium
- Operating Temperature
- 400-800°C
- Efficiency
- >95%
Muffler
- Material
- Stainless steel
- Part Number
- 18107548055
- internal Baffles
- Perforated tube with sound-absorbing material
- Dimensions
- 800 mm x 300 mm x 200 mm
- Weight
- 8.5 kg
Tailpipes
- Material
- Stainless steel
- Diameter
- 80 mm
- Finish
- Polished
- Part Number
- 18107548057
- Tip Style
- Dual round
Exhaust Pipes
- Material
- Stainless steel
- Diameter
- 60 mm
- Wall Thickness
- 1.5 mm
- Flex Pipe
- Material: Stainless steel braidedLength: 150 mmPart Number: 18107548059
Mounting System
- Hangers
- Material: Rubber with steel coreQuantity: 4Part Number: 18107548061
- Brackets
- Material: SteelCoating: Zinc-platedPart Number: 18107548063
- Fasteners
- Bolt Torque: 22 NmNut Torque: 20 NmWasher Material: Stainless steel
Operational Parameters
- Exhaust Gas Temperature
- Normal Range: 200-600°CMax Limit: 900°C
- Back Pressure
- Normal Range: 0.5-1.5 psiMax Limit: 2.5 psi
- Flow Rate
- 450 CFM at 6000 RPM
Diagnostic Specifications
- Oxygen Sensor
- Type: WidebandPart Number: 11787548065Location: Pre and post catalytic converterVoltage Range: 0.1-0.9 V
- Error Codes
-
- P0420
- P0430
- P0135
- P0141
- inspection Interval
- Every 30,000 miles or 24 months
Maintenance Specifications
- Cleaning Interval
- Every 15,000 miles
- inspection Interval
- Every 30,000 miles
- Replacement interval
- Catalytic Converter: 100,000 milesMuffler: 150,000 milesOxygen Sensor: 60,000 miles
- Torque Specifications
- Manifold Bolts: 25 NmExhaust Flange Bolts: 22 NmHanger Brackets: 20 Nm
Service Information Service
Detailed service requirements and schedules for the exhaust system
- Inspect exhaust system for leaks
- Check hangers and brackets for wear
- Clean tailpipes
Ensure all fasteners are properly torqued
- Inspect catalytic converter efficiency
- Check oxygen sensor operation
- Inspect exhaust pipes for corrosion
Replace oxygen sensor if necessary
- Replace oxygen sensor
- Inspect and clean exhaust system
- Check for excessive back pressure
Perform diagnostic scan for error codes
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What is the diameter of the exhaust pipes on the 2005-2011 BMW 340i?
What is the diameter of the exhaust pipes on the 2005-2011 BMW 340i?
The exhaust pipes on the 2005-2011 BMW 340i have a diameter of 65mm (2.56 inches) for the primary pipes and 70mm (2.76 inches) for the secondary pipes. These dimensions are critical for maintaining proper exhaust flow and backpressure.
Q2 What type of catalytic converter is used in the 2005-2011 BMW 340i exhaust system?
What type of catalytic converter is used in the 2005-2011 BMW 340i exhaust system?
The 2005-2011 BMW 340i is equipped with a dual-stage catalytic converter system. The primary catalytic converter is a metallic substrate type with a 400-cell count, while the secondary converter uses a ceramic substrate with a 200-cell count. Both are designed to meet Euro 4 emissions standards.
Q3 What is the recommended torque specification for the exhaust manifold bolts?
What is the recommended torque specification for the exhaust manifold bolts?
The exhaust manifold bolts on the 2005-2011 BMW 340i should be torqued to 25 Nm (18.4 ft-lbs) in a crisscross pattern to ensure even pressure distribution. Over-tightening can lead to gasket failure or manifold cracking.
Q4 Can aftermarket exhaust systems affect the vehicle's warranty?
Can aftermarket exhaust systems affect the vehicle's warranty?
Yes, installing an aftermarket exhaust system may void the warranty on related components, such as the engine or emissions system, if the modification is found to cause damage or non-compliance with BMW's specifications. Always consult your dealer before making modifications.
Q5 What is the material composition of the exhaust system on the 2005-2011 BMW 340i?
What is the material composition of the exhaust system on the 2005-2011 BMW 340i?
The exhaust system is primarily constructed from stainless steel (grade 409 for the mid-section and grade 304 for the tailpipes) to resist corrosion and withstand high temperatures. The muffler is made of aluminized steel for durability.
Q6 How often should the exhaust system be inspected for wear or damage?
How often should the exhaust system be inspected for wear or damage?
The exhaust system should be inspected every 30,000 miles or during routine maintenance. Pay special attention to the hangers, gaskets, and joints for signs of wear, corrosion, or leaks.
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 340i Exhaust System Service Manual
Coming SoonOfficial BMW service manual detailing exhaust system removal, installation, and maintenance procedures for the 2005-2011 340i.
Exhaust System Torque Specifications Guide
Coming SoonA comprehensive guide to torque specifications for all exhaust components, including manifolds, flanges, and clamps.
BMW Genuine Parts Catalog
Coming SoonAccess the official BMW parts catalog to find genuine exhaust components for the 2005-2011 340i.
Exhaust System Troubleshooting Guide
Coming SoonStep-by-step guide to diagnosing common exhaust system issues, such as leaks, rattles, and performance degradation.
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