BMW X4 2014-2018

BMW X4 2014-2018 Exhaust Specifications

Detailed technical specifications and documentation for the 2014-2018 BMW X4 exhaust system, including exhaust manifold, catalytic converter, muffler, tailpipe, and EGR system components.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the exhaust specifications for the 2014-2018 BMW X4, including key features, measurements, and technical details. This section provides detailed insights into 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

60 mm

Catalytic Converter Efficiency

95%

Maximum Exhaust Flow Rate

450 CFM

Muffler Weight

12.5 kg

Backpressure at 6000 RPM

1.2 psi

Available Specifications

Exhaust System Components

Detailed breakdown of the primary components of the BMW X4 exhaust system, including materials, dimensions, and functional roles.

Exhaust Manifold

Material: Cast iron with heat-resistant coating
Diameter: 60 mm
Designed for optimal exhaust gas flow
Integrated with turbocharger for enhanced performance
Operating temperature range: -40°C to 900°C

Catalytic Converter

Type: Three-way catalytic converter
Material: Ceramic substrate with platinum, palladium, and rhodium coating
Efficiency: Reduces harmful emissions by up to 95%
Operating temperature: 400°C to 800°C
Compliance: Meets Euro 6 emission standards

Note: Ensure proper engine tuning to maintain catalytic converter efficiency.

Muffler and Tailpipe

Material: Stainless steel with chrome finish
Muffler design: Dual-chamber for noise reduction
Tailpipe diameter: 80 mm
Exhaust note: Sporty and refined
Weight: 12.5 kg

Exhaust System Performance

Technical details about the exhaust system's performance, including flow rates, backpressure, and noise levels.

Exhaust Flow Rate

Maximum flow rate: 450 CFM (cubic feet per minute)
Optimized for 2.0L and 3.0L engine variants
Backpressure: 1.2 psi at 6000 RPM
Designed for minimal restriction
Enhances engine power output

Noise Levels

Idle noise level: 45 dB
Cruising noise level: 65 dB
Maximum noise level: 75 dB at full throttle
Complies with EU noise regulations
Tuned for a balanced sporty sound

Note: Noise levels may vary based on driving conditions and engine load.

Maintenance and Service

Guidelines for maintaining and servicing the BMW X4 exhaust system, including inspection intervals and common issues.

Inspection Intervals

Visual inspection every 10,000 miles
Check for leaks, cracks, and corrosion
Inspect mounting brackets and hangers
Verify catalytic converter efficiency
Replace worn components as needed

Common Issues

Rust and corrosion in harsh climates
Catalytic converter clogging due to poor fuel quality
Exhaust leaks at joints and gaskets
Muffler damage from road debris
Excessive noise due to internal baffle failure

Note: Use only OEM or approved aftermarket parts for replacements.

Search Specifications

Search by specification name, value, or description

Component Specifications

General Specifications

Material: Stainless steel

System Type: Dual exhaust with rear muffler

Emission Standard: Euro 6

Part Number: 18307650001

Weight: 22.5 kg

Exhaust Manifold

Material: Cast iron

Bolt Torque: 25 Nm

Gasket Part Number: 11627548025

Heat Shield Part Number: 11627548026

Notes: Ensure proper alignment during installation to avoid leaks

Catalytic Converter

Type: Three-way catalytic converter

Part Number: 18307546693

Efficiency: >95%

Operating Temperature: 400-800°C

Notes: Monitor for clogging or damage to maintain emission standards

Oxygen Sensors

Type: Wideband zirconia sensor

Part Number: 11787558025

Location

Upstream of catalytic converter
Downstream of catalytic converter

Operating Voltage: 0.1-0.9 V

Replacement interval: 100,000 miles

Notes: Ensure proper wiring and connector integrity during replacement

Muffler

Material: Stainless steel

Part Number: 18307650002

Dimensions: 800 x 300 x 200 mm

Noise Reduction: 20 dB

Notes: Inspect for rust or damage, especially in winter conditions

Exhaust Pipes

Material: Stainless steel

Diameter: 70 mm

Wall Thickness: 1.5 mm

Part Number: 18307650003

Notes: Ensure proper alignment and secure mounting to prevent vibrations

Exhaust Clamps

Material: Stainless steel

Part Number: 18307650004

Torque Specification: 10 Nm

Notes: Replace if corroded or damaged to prevent leaks

Exhaust Hangers

Material: Rubber with steel core

Part Number: 18307650005

Load Capacity: 15 kg

Notes: Inspect for cracks or wear, especially in high-temperature areas

Exhaust Tips

Material: Chrome-plated stainless steel

Part Number: 18307650006

Diameter: 90 mm

Notes: Ensure proper alignment and secure attachment for aesthetic appeal

Diagnostic Specifications

Error Codes

P0420
P0430
P0135
P0141

Diagnostic Tool: BMW ISTA/D

Notes: Use manufacturer-recommended tools for accurate diagnosis and troubleshooting

Service Information Service

Detailed service requirements and schedules for the exhaust system

30,000

Inspect exhaust system for leaks, damage, and corrosion
Check oxygen sensor operation
Inspect catalytic converter for damage or clogging

Perform visual and functional checks to ensure system integrity

60,000

Replace oxygen sensors if necessary
Inspect and tighten exhaust clamps
Check exhaust hangers for wear or damage

Replace components as needed to maintain performance and emissions standards

100,000

Replace catalytic converter if efficiency drops below 90%
Inspect and replace muffler if necessary
Check exhaust pipes for alignment and damage

Ensure all components are functioning within manufacturer specifications

Frequently Asked Questions

Find answers to common questions about torque specifications

What is the diameter of the exhaust pipes on the 2014-2018 BMW X4?

The exhaust pipes on the 2014-2018 BMW X4 have a diameter of 70 mm (2.75 inches) for the standard trim. For the M40i trim, the diameter increases to 80 mm (3.15 inches) to accommodate higher performance requirements.

What type of catalytic converter is used in the 2014-2018 BMW X4?

The 2014-2018 BMW X4 is equipped with a three-way catalytic converter with a ceramic monolith substrate. It is designed to reduce emissions of CO, NOx, and hydrocarbons, meeting Euro 6 emission standards.

What is the recommended service interval for the exhaust system?

BMW recommends inspecting the exhaust system every 30,000 miles or 24 months, whichever comes first. This includes checking for leaks, corrosion, and ensuring all mounting points are secure.

Can I replace the stock exhaust with an aftermarket system without voiding the warranty?

Replacing the stock exhaust with an aftermarket system may void the warranty if the modification is deemed to cause damage or failure of other components. Always consult your BMW dealership or warranty documentation before making modifications.

What is the material used for the exhaust system in the 2014-2018 BMW X4?

The exhaust system is primarily made of stainless steel, which provides durability and resistance to corrosion. The M40i trim features a lightweight titanium exhaust tip for enhanced performance and aesthetics.

How does the exhaust system impact vehicle performance?

The exhaust system plays a critical role in optimizing engine performance by ensuring efficient expulsion of exhaust gases. A well-maintained system reduces backpressure, improving horsepower and fuel efficiency.

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 X4 Exhaust System Maintenance Guide

Coming Soon

A detailed guide on maintaining the exhaust system, including inspection procedures and common issues.

BMW Genuine Exhaust Parts Catalog

Coming Soon

Official catalog of genuine BMW exhaust components for the 2014-2018 X4, ensuring compatibility and performance.

Exhaust System Troubleshooting for BMW X4

Coming Soon

Step-by-step troubleshooting guide for diagnosing and resolving common exhaust system issues.

BMW X4 Exhaust Upgrade Options

Coming Soon

Explore performance and aesthetic upgrade options for the exhaust system, including M Performance parts.

About the Author

Expert automotive knowledge and experience

ASE

Alan Montanye

Automotive Technical Specialist

ASE Master Certified Technician with over a decade of hands-on experience in automotive repair and diagnostics.

Facebook Contact

15+ Years

Experience

500+ Guides

Guides

50+ Makes

Vehicles

1000+ Solutions

Solutions

Diagnostic

Specialized in advanced diagnostic techniques using modern scan tools and oscilloscopes.

Repair

Expert in both traditional mechanical repairs and modern vehicle systems.

Additional Expertise

Documentation

Created over 500 detailed repair guides and technical documents.

Training

Conducted technical training sessions and contributed to repair databases.

Certifications & Research

Certifications

ASE Master Technician Certification
Advanced Diagnostic Specialist
Hybrid/Electric Vehicle Systems
Performance Tuning Expert

Research & Community

Actively researches emerging technologies and contributes to automotive forums.

Legal Disclaimer

Important information about using this content

Always refer to your vehicle's service manual and take appropriate safety precautions when performing any maintenance or repairs.

General Information

The information provided on this website is for general informational purposes only. While we strive to maintain accuracy in our content, all specifications, procedures, and technical information should be verified against your vehicle's official service manual or with the manufacturer directly.

Warranty & Liability

The content on this website is provided "as is" without any representations or warranties, express or implied. We make no representations or warranties regarding the accuracy, completeness, or availability of the information.

We shall not be liable for any direct, indirect, special, or consequential damages arising from the use of information on this website.

Technical Information

All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
Vehicle specifications and procedures may vary by model year, trim level, and region.
Always follow the manufacturer's recommended procedures and safety precautions.
Working on vehicles can be dangerous. Always take proper safety precautions and use appropriate safety equipment.
If you're unsure about any procedure, consult a qualified professional mechanic.

Intellectual Property

All content, including text, images, and specifications, is protected by copyright and other intellectual property laws. Any unauthorized use or reproduction is prohibited.