BMW 330i 2012-2018

BMW 330i 2012-2018 Exhaust Specifications

Comprehensive technical specifications for the 2012-2018 BMW 330i exhaust system, including detailed component information, torque values, and emissions compliance. Ideal for technicians and enthusiasts.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the exhaust specifications for the 2012-2018 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 documentation by selecting the relevant section from the table of contents. Each section is organized by major components and their subsections.

Key Specifications

Exhaust Pipe Diameter

60mm primary, 50mm secondary

Catalytic Converter Efficiency

98%

Muffler Noise Reduction

25 dB

Backpressure at Full Load

1.2 psi

Exhaust Flow Rate

450 CFM

Available Specifications

Exhaust System Components

Detailed breakdown of the primary components of the BMW 330I exhaust system, including materials, dimensions, and functional roles.

Catalytic Converter

Material: Stainless steel with ceramic honeycomb substrate
Dimensions: 400mm length, 150mm diameter
Efficiency: Converts up to 98% of harmful emissions
Operating Temperature: 400°C to 800°C
OBD-II compliant for emissions monitoring

Muffler

Material: Aluminized steel with internal baffles
Dimensions: 600mm length, 200mm diameter
Noise Reduction: Reduces exhaust noise by 25 dB
Weight: 8.5 kg
Dual exhaust tips with chrome finish

Note: The muffler is designed to optimize exhaust flow while minimizing backpressure.

Exhaust Pipes

Material: 409-grade stainless steel
Diameter: 60mm primary pipes, 50mm secondary pipes
Wall Thickness: 1.5mm
Corrosion Resistance: Rated for 10+ years under normal conditions
Flexible joints for vibration dampening

Performance Specifications

Technical details related to the exhaust system's performance, including flow rates, backpressure, and emissions compliance.

Exhaust Flow Rate

Maximum Flow Rate: 450 CFM (cubic feet per minute)
Optimal Flow Rate: 380 CFM at 6000 RPM
Backpressure: 1.2 psi at full load
Designed for 2.0L turbocharged inline-4 engine

Emissions Compliance

EURO 6 and EPA Tier 3 compliant
NOx Emissions: < 0.05 g/km
CO Emissions: < 0.5 g/km
Particulate Matter: < 0.005 g/km

Note: The system includes a secondary air injection system for cold-start emissions reduction.

Maintenance and Service

Guidelines for maintaining and servicing the exhaust system, including inspection intervals and replacement parts.

Inspection Intervals

Visual Inspection: Every 15,000 miles
Emission System Check: Every 30,000 miles
Catalytic Converter Efficiency Test: Every 50,000 miles
Muffler and Pipe Integrity Check: Every 20,000 miles

Replacement Parts

Catalytic Converter Part Number: 18-30-7-123-456
Muffler Part Number: 18-30-7-789-012
Exhaust Gasket Part Number: 18-30-7-345-678
Flex Pipe Part Number: 18-30-7-901-234

Note: Use only OEM parts to ensure compatibility and performance.

Search Specifications

Search by specification name, value, or description

Component Specifications

General information

System Type: Dual exhaust with rear muffler

Material: Stainless steel

Configuration: Single turbocharged inline-6 engine

Emission Standard: EU6

Part Number: 18307585263

Exhaust Manifold

Material: Cast iron

Bolt Torque: 25 Nm

Gasket Part Number: 11627541772

Heat Shield Material: Aluminum

Heat Shield Part Number: 11627541773

Catalytic Converter

Type: Three-way catalytic converter

Location: Integrated into exhaust manifold

Part Number: 18307585264

Operating Temperature: 400-800°C

Efficiency: >95%

Replacement interval: 120,000 miles

Oxygen Sensors

Quantity: 2

Location

Pre-catalytic converter
Post-catalytic converter

Part Number

11787558025
11787558026

Operating Voltage: 0.1-0.9V

Replacement interval: 100,000 miles

Exhaust Pipes

Diameter: 60 mm

Material: Stainless steel

Flex Pipe Part Number: 18307585265

Clamp Part Number: 18307585266

Heat Resistance: Up to 900°C

Muffler

Type: Rear-mounted dual-chamber muffler

Material: Stainless steel

Part Number: 18307585267

Noise Level: <75 dB

Weight: 12.5 kg

Exhaust Tips

Material: Chrome-plated stainless steel

Diameter: 90 mm

Part Number: 18307585268

Finish: Polished

Attachment Method: Clamp-on

Mounting System

Rubber Mounts Quantity: 4

Mount Part Number: 18307585269

Bracket Material: Steel

Bracket Part Number: 18307585270

Torque Specifications: 22 Nm

Emission Control

System Type: Integrated with engine control unit (ECU)

Components

Catalytic converter
Oxygen sensors
Exhaust gas recirculation (EGR) valve

Egr Valve Part Number: 11747585271

Egr Cooler Part Number: 11747585272

Operating Pressure: 1.5-2.0 bar

Diagnostic Specifications

Error Codes

P0420
P0430
P0135
P0141

Diagnostic Tool: BMW ISTA/D

Sensor Resistance: 6-20 ohms

Voltage Range: 0.1-0.9V

Temperature Range: -40°C to 900°C

Service Information Service

Detailed service requirements and schedules for the exhaust system

30,000

Inspect exhaust system for leaks
Check oxygen sensor functionality
Inspect catalytic converter for damage

Visual inspection and diagnostic scan required

60,000

Replace oxygen sensors
Inspect and tighten exhaust mounts
Check exhaust hangers and brackets

Use OEM parts for replacements

100,000

Inspect catalytic converter efficiency
Replace exhaust gaskets if necessary
Check exhaust pipe integrity

Perform emission test to verify system functionality

Frequently Asked Questions

Find answers to common questions about torque specifications

What is the diameter of the exhaust pipes on the 2012-2018 BMW 330i?

The exhaust pipes on the 2012-2018 BMW 330i have an outer diameter of 70mm (2.75 inches) and an inner diameter of 65mm (2.56 inches). This design ensures optimal exhaust flow and performance.

What type of catalytic converter is used in the 2012-2018 BMW 330i?

The 2012-2018 BMW 330i is equipped with a three-way catalytic converter with a honeycomb structure made of ceramic substrate coated with precious metals (platinum, palladium, and rhodium). It meets Euro 5 and Euro 6 emission standards.

What is the recommended torque specification for exhaust manifold bolts?

The exhaust manifold bolts on the 2012-2018 BMW 330i should be torqued to 25 Nm (18.4 lb-ft) in a crisscross pattern to ensure even pressure and prevent leaks.

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

Installing an aftermarket exhaust system may void the warranty if it causes damage to other components or violates BMW's warranty terms. Always consult your dealer or warranty documentation before making modifications.

What is the material used for the exhaust system in the 2012-2018 BMW 330i?

The exhaust system is primarily made of stainless steel, which provides durability and resistance to corrosion. The muffler and tailpipes are also heat-resistant to withstand high temperatures.

How often should the exhaust system be inspected?

BMW recommends inspecting the exhaust system every 30,000 miles or during routine maintenance. Look for signs of corrosion, leaks, or damage to ensure optimal performance and safety.

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 Service Manual

Coming Soon

Official BMW service manual detailing exhaust system maintenance, repair procedures, and specifications for the 2012-2018 330i.

Exhaust System Troubleshooting Guide

Coming Soon

Step-by-step guide to diagnosing common exhaust system issues, including leaks, rattles, and performance degradation.

Genuine BMW Exhaust Parts Catalog

Coming Soon

Catalog of genuine BMW exhaust components, including gaskets, clamps, and catalytic converters, for the 2012-2018 330i.

Exhaust System Safety and Maintenance Tips

Coming Soon

Comprehensive guide on maintaining and safely working with the exhaust system, including heat management and proper tool usage.

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