BMW 335i 2012-2018

BMW 335i 2012-2018 Exhaust Specifications

Comprehensive technical specifications for the 2012-2018 BMW 335I exhaust system, including detailed diagrams, torque values, and material specifications. Ideal for technicians and enthusiasts.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the exhaust specifications for the 2012-2018 BMW 335I, 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)

Maximum Exhaust Flow Rate

450 CFM

Backpressure at Full Load

1.2 psi (8.3 kPa)

Total System Weight

45 lbs (20.4 kg)

CO2 Emissions

170 g/km

Available Specifications

Exhaust System Overview

This section provides an overview of the exhaust system, including its components, materials, and general design.

Exhaust System Components

Dual exhaust system with two tailpipes
Stainless steel construction for durability
Integrated catalytic converters for emissions control
Resonator and muffler for noise reduction
Exhaust pipe diameter: 2.5 inches (63.5 mm)

Materials and Construction

High-quality stainless steel for corrosion resistance
TIG welding for strong and durable joints
Heat-resistant coatings for longevity
Lightweight design for improved performance
Total system weight: 45 lbs (20.4 kg)

Note: The use of stainless steel ensures long-term durability and resistance to rust.

Performance Specifications

This section covers the performance-related specifications of the exhaust system, including flow rates, backpressure, and emissions compliance.

Exhaust Flow and Backpressure

Maximum exhaust flow rate: 450 CFM (cubic feet per minute)
Backpressure at full load: 1.2 psi (8.3 kPa)
Optimized for high-performance turbocharged engines
Designed to minimize power loss
Flow efficiency: 95%

Emissions Compliance

Meets Euro 6 and EPA Tier 3 emissions standards
Dual catalytic converters with 400 cells per square inch
NOx reduction efficiency: 98%
CO2 emissions: 170 g/km
OBD-II compliant for diagnostics

Note: The catalytic converters are designed to operate efficiently at high temperatures.

Maintenance and Service

This section provides information on maintaining and servicing the exhaust system, including inspection intervals and replacement parts.

Inspection and Maintenance

Inspect exhaust system every 15,000 miles (24,000 km)
Check for leaks, cracks, and corrosion
Replace gaskets and seals as needed
Tighten all clamps and brackets during service
Use OEM parts for replacements

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
Clamp part number: 18-30-7-901-234
Tailpipe trim part number: 18-30-7-567-890

Note: Always use genuine BMW parts to ensure proper fit and performance.

Search Specifications

Search by specification name, value, or description

Component Specifications

General information

Vehicle Model: 2012-2018 BMW 335i

Engine Type: N55 3.0L TwinPower Turbo Inline-6

Exhaust Type: Dual exhaust system with dual catalytic converters

Material: Stainless steel

Part Number: 18307585261

Exhaust Manifold

Material: Cast iron

Bolt Torque: 23 Nm (17 ft-lbs)

Gasket Part Number: 11627548912

Heat Shield Material: Aluminum

Heat Shield Part Number: 11627548913

Catalytic Converters

Type: Dual catalytic converters

Location: Integrated into the downpipes

Material: Ceramic substrate with platinum and palladium coating

Part Number: 18307585262

Operating Temperature: 400-800°C (752-1472°F)

Efficiency: >95%

Downpipes

Material: Stainless steel

Diameter: 70 mm (2.75 in)

Part Number: 18307585263

Flex Pipe Material: Stainless steel braided

Flex Pipe Part Number: 18307585264

Mid Pipe

Material: Stainless steel

Diameter: 65 mm (2.56 in)

Part Number: 18307585265

Resonator: Integrated

Resonator Part Number: 18307585266

Muffler

Type: Dual chamber muffler

Material: Stainless steel

Part Number: 18307585267

Outlet Diameter: 80 mm (3.15 in)

Weight: 12.5 kg (27.5 lbs)

Exhaust Tips

Material: Stainless steel with chrome finish

Diameter: 90 mm (3.54 in)

Part Number: 18307585268

Length: 150 mm (5.91 in)

Mounting Hardware

Hanger Material: Rubber with steel reinforcement

Hanger Part Number: 18307585269

Bolt Material: High-strength steel

Bolt Torque: 25 Nm (18.4 ft-lbs)

Gasket Material: Graphite

Gasket Part Number: 18307585270

Emission Standards

Compliance: Euro 6 and EPA Tier 2 Bin 5

Nox Emissions: <0.07 g/km

Co Emissions: <1.0 g/km

Hc Emissions: <0.1 g/km

Diagnostic Specifications

O2 Sensor Type: Wideband zirconia sensor

O2 Sensor Part Number: 11787548914

O2 Sensor Location: Pre and post catalytic converter

O2 Sensor Operating Temperature: -40 to 900°C (-40 to 1652°F)

O2 Sensor Response Time: <100 ms

Service Information Service

Detailed service requirements and schedules for the exhaust system

30000

Inspect exhaust system for leaks and damage
Check catalytic converter efficiency
Inspect O2 sensors for proper operation

Replace O2 sensors if diagnostic codes indicate failure

60000

Inspect and replace exhaust gaskets if necessary
Check exhaust hangers and mounts for wear
Inspect catalytic converter for physical damage

Replace catalytic converter if efficiency drops below 90%

100000

Inspect entire exhaust system for corrosion
Replace O2 sensors as preventive maintenance
Check exhaust tips for alignment and damage

Consider replacing the entire exhaust system if significant corrosion is found

Frequently Asked Questions

Find answers to common questions about torque specifications

What is the diameter of the exhaust pipes on the 2012-2018 BMW 335i?

The exhaust system on the 2012-2018 BMW 335i features dual exhaust pipes, each with a diameter of 80mm (3.15 inches). This design ensures optimal exhaust flow and performance.

What type of catalytic converter is used in the 2012-2018 BMW 335i?

The 2012-2018 BMW 335i is equipped with a high-performance, dual-stage catalytic converter. The primary catalytic converter is integrated into the downpipe, while the secondary catalytic converter is located further downstream in the exhaust system. Both are designed to meet strict emissions standards.

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

Installing an aftermarket exhaust system may void your warranty if it directly causes damage to the vehicle or related components. BMW recommends using genuine or approved aftermarket parts and consulting your dealer or a certified technician before making modifications to ensure compliance with warranty terms.

What is the recommended service interval for the exhaust system?

The exhaust system on the 2012-2018 BMW 335i does not have a specific service interval. However, it should be inspected during routine maintenance, typically every 10,000-15,000 miles, for signs of corrosion, leaks, or damage to the catalytic converter, muffler, or pipes.

Does the 2012-2018 BMW 335i have a valved exhaust system?

Yes, the 2012-2018 BMW 335i is equipped with an electronically controlled exhaust flap system. This system adjusts the exhaust flow and sound based on driving conditions and throttle input, enhancing both performance and driving experience.

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 Soon

A detailed guide on maintaining and inspecting the exhaust system for the 2012-2018 BMW 335i, including common issues and troubleshooting tips.

Genuine BMW Exhaust Parts Catalog

Coming Soon

Access the official catalog of genuine BMW exhaust components for the 2012-2018 335i, ensuring compatibility and performance.

Exhaust System Installation Manual

Coming Soon

Step-by-step instructions for safely installing or replacing the exhaust system on the 2012-2018 BMW 335i, including torque specifications and safety precautions.

Emissions Compliance and Exhaust Systems

Coming Soon

Learn about emissions standards and how the exhaust system on the 2012-2018 BMW 335i complies with regulations.

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