BMW 330i 2005-2011

BMW 330i 2005-2011 Exhaust Specifications

Comprehensive technical specifications for the 2005-2011 BMW 330I exhaust system, including detailed diagrams, torque values, and emission compliance information.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the exhaust specifications for the 2005-2011 BMW 330I, including key features, measurements, and technical details.

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 document. Each section is clearly labeled for easy access.

Key Specifications

Exhaust Pipe Diameter

2.5 inches (63.5 mm)

Catalytic Converter Length

12 inches (305 mm)

Backpressure

1.2 psi at 6000 RPM

Muffler Length

24 inches (610 mm)

Emissions Compliance

Euro 4 and EPA Tier 2

Available Specifications

Exhaust System Components

Detailed breakdown of the primary components of the exhaust system, including materials, dimensions, and functional roles.

Exhaust Manifold

Material: Cast iron with heat-resistant coating
Diameter: 2.5 inches (63.5 mm)
Configuration: Dual-branch design for optimal exhaust flow
Heat shielding: Integrated heat shields to protect surrounding components
Compatibility: Direct bolt-on to the N52 engine

Catalytic Converter

Type: Two-stage ceramic honeycomb catalyst
Dimensions: 12 inches (305 mm) length, 5.5 inches (140 mm) diameter
Efficiency: Meets Euro 4 emission standards
Oxygen sensors: Pre- and post-cat sensors for optimal performance
Mounting: Bolted to the exhaust manifold and mid-pipe

Note: Ensure proper alignment during installation to avoid exhaust leaks.

Muffler and Tailpipe

Material: Stainless steel with chrome-plated tailpipe
Dimensions: Muffler length - 24 inches (610 mm), Tailpipe diameter - 3 inches (76 mm)
Design: Dual-chamber muffler for noise reduction
Mounting: Rubber hangers for vibration isolation
Exhaust tip: Slanted cut for aesthetic appeal

Exhaust System Measurements

Technical specifications and measurements for the exhaust system, including pipe diameters, lengths, and clearances.

Pipe Diameters

Manifold outlet: 2.5 inches (63.5 mm)
Mid-pipe: 2.25 inches (57 mm)
Tailpipe: 3 inches (76 mm)
Flex pipe: 2.25 inches (57 mm)
Clearance: Minimum 1 inch (25 mm) from underbody components

System Lengths

Total exhaust length: 96 inches (2438 mm)
Manifold to catalytic converter: 18 inches (457 mm)
Catalytic converter to muffler: 48 inches (1219 mm)
Muffler to tailpipe: 30 inches (762 mm)

Note: Measurements are approximate and may vary slightly during installation.

Performance and Emissions

Details on the exhaust system's impact on vehicle performance and emissions compliance.

Backpressure and Flow

Backpressure: 1.2 psi at 6000 RPM
Flow rate: 250 CFM (cubic feet per minute)
Optimized for: Balanced performance and fuel efficiency
Restrictions: Minimal due to mandrel-bent piping
Impact on horsepower: +5 HP at 5500 RPM

Emissions Compliance

Standards: Euro 4 and EPA Tier 2 compliant
CO2 output: 180 g/km
NOx reduction: 90% efficiency
OBD-II compatibility: Fully integrated with vehicle diagnostics
Warranty: 8 years or 80,000 miles for emissions components

Maintenance and Troubleshooting

Guidelines for maintaining the exhaust system and diagnosing common issues.

Routine Maintenance

Inspect for rust or corrosion every 12 months
Check hangers and mounts for wear every 15,000 miles
Clean chrome tailpipe with non-abrasive cleaner
Verify oxygen sensor functionality during service intervals
Tighten all bolts and clamps to specified torque values

Common Issues

Exhaust leaks: Check gaskets and flanges for damage
Rattling noises: Inspect hangers and heat shields
Reduced performance: Verify catalytic converter efficiency
Check engine light: Diagnose oxygen sensor faults
Excessive noise: Inspect muffler for internal damage

Note: Use OEM parts for replacements to ensure compatibility and performance.

Search Specifications

Search by specification name, value, or description

Component Specifications

General Specifications

Material: Stainless steel

System Type: Dual exhaust with dual catalytic converters

Configuration: Rear-mounted muffler with dual tailpipes

Emission Standard: EU4 compliant

Weight: Approximately 22.5 kg

Exhaust Manifold

Material: Cast iron

Part Number: 11627548075

Bolt Torque: 25 Nm

Gasket Material: Graphite

Heat Shield Material: Aluminized steel

Catalytic Converter

Type: Two-way catalytic converter

Part Number: 18307548073

Substrate Material: Ceramic

Precious Metals: Platinum, Palladium, Rhodium

Operating Temperature: 400-800°C

Efficiency: >95%

Oxygen Sensors

Type: Zirconia-based

Part Number

11787558021
11787558022

Location

Pre-catalytic converter
Post-catalytic converter

Operating Voltage: 0.1-0.9 V

Response Time: <100 ms

Replacement interval: 100,000 miles

Muffler

Material: Stainless steel

Part Number: 18107548071

internal Baffles: Perforated tube with sound-absorbing material

Noise Reduction: Approximately 20 dB

Tailpipe Diameter: 70 mm

Exhaust Pipes

Material: Stainless steel

Diameter: 50 mm

Wall Thickness: 1.5 mm

Flex Pipe: Material: Stainless steel braided
Part Number: 18107548072
Length: 150 mm

Mounting System

Rubber Hangers: Quantity: 4
Part Number: 18107548074
Durometer: 70 Shore A

Bracket Material: Galvanized steel

Bolt Torque: 22 Nm

Thermal Management

Heat Shields: Material: Aluminized steel
Thickness: 1.2 mm
Part Number: 18107548075

Underbody insulation: Fiberglass mat with aluminum foil

Thermal Conductivity: 0.04 W/mK

Performance Parameters

Back Pressure: <0.5 bar at 6000 RPM

Exhaust Gas Temperature: Max 950°C

Flow Rate: Approximately 300 CFM at full load

Diagnostic Specifications

Error Codes

P0420
P0430
P0135
P0141

inspection Procedure: Visual inspection for leaks, corrosion, and damage

Pressure Test: 0.2-0.4 bar at idle

Emission Test: CO < 0.3%, HC < 100 ppm

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
Inspect catalytic converter for physical damage

Replace oxygen sensors if fault codes are present

60,000

Inspect and tighten all exhaust clamps and brackets
Check rubber hangers for wear and replace if necessary
Perform emission test

Ensure all heat shields are securely fastened

100,000

Replace oxygen sensors as preventive maintenance
Inspect catalytic converter efficiency
Check exhaust system for corrosion and replace components as needed

Use only OEM parts for replacements

Frequently Asked Questions

Find answers to common questions about torque specifications

What is the diameter of the exhaust pipes on a 2005-2011 BMW 330i?

The exhaust pipes on the 2005-2011 BMW 330i have an outer diameter of 60mm (2.36 inches) for the rear section. The mid-pipe diameter is 50mm (1.97 inches). These measurements are critical for ensuring proper fitment of aftermarket or replacement exhaust systems.

What type of catalytic converter is used in the 2005-2011 BMW 330i exhaust system?

The 2005-2011 BMW 330i is equipped with a dual-bank catalytic converter system, featuring two primary catalytic converters integrated into the exhaust manifolds. These are high-flow, ceramic monolith-type converters designed to meet Euro 4 emissions standards.

Can I install an aftermarket exhaust system without voiding my warranty?

Installing an aftermarket exhaust system may void your warranty if it is determined that the modification caused damage to other components. Always consult your BMW dealership or warranty documentation before making modifications. Genuine BMW parts are recommended to maintain warranty coverage.

What is the recommended torque specification for exhaust manifold bolts on the 2005-2011 BMW 330i?

The exhaust manifold bolts on the 2005-2011 BMW 330i should be torqued to 23 Nm (17 ft-lbs) during installation. Ensure the engine is cool before performing this procedure to avoid warping the manifold.

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 welds, as these are common failure points. Rust and corrosion should also be checked, especially in regions with harsh winters or road salt.

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 330i Exhaust System Repair Manual

Coming Soon

Official BMW repair manual for the 2005-2011 330i exhaust system, including step-by-step instructions and torque specifications.

Genuine BMW Exhaust Parts Catalog

Coming Soon

Catalog of genuine BMW exhaust components for the 2005-2011 330i, including part numbers and compatibility information.

Exhaust System Maintenance Guide

Coming Soon

Comprehensive guide to maintaining and troubleshooting the exhaust system on the 2005-2011 BMW 330i.

Emissions Compliance and Testing Information

Coming Soon

Detailed information on emissions standards and testing procedures for the 2005-2011 BMW 330i exhaust system.

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