BMW X1 2015-2021

BMW X1 2015-2021 Exhaust Specifications

Comprehensive technical documentation for the exhaust system of the 2015-2021 BMW X1, covering components, materials, dimensions, emissions standards, and maintenance guidelines.

Updated Oct 14, 2023

Overview Specifications

Comprehensive description of the exhaust specifications for the 2015-2021 BMW X1, 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 labeled with a major title and contains subsections for detailed information.

Key Specifications

Exhaust Pipe Diameter

60mm

Catalytic Converter Efficiency

98%

Muffler Weight

8.5 kg

Backpressure

1.2 psi

CO2 Emissions

130 g/km

Available Specifications

Exhaust System Components

Detailed breakdown of the primary components of the BMW X1 exhaust system, including materials, dimensions, and functional roles.

Catalytic Converter

Material: Stainless steel with ceramic honeycomb substrate
Dimensions: 300mm length, 120mm diameter
Efficiency: Reduces harmful emissions by up to 98%
Operating Temperature: 400°C to 800°C
OBD-II compliant for emission monitoring

Muffler

Material: Aluminized steel with sound-absorbing fiberglass
Dimensions: 600mm length, 200mm width, 150mm height
Noise Reduction: Reduces exhaust noise by 20-30 dB
Weight: 8.5 kg
Dual exhaust tips with chrome finish

Note: The muffler is designed to balance noise reduction and backpressure for optimal engine performance.

Exhaust Pipes

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

Exhaust System Performance

Technical details on the performance characteristics of the BMW X1 exhaust system, including flow rates, backpressure, and emission standards.

Flow Rate and Backpressure

Flow Rate: 450 CFM (cubic feet per minute) at 6000 RPM
Backpressure: 1.2 psi at full load
Optimized for 2.0L turbocharged engine
Pressure drop across catalytic converter: 0.5 psi
Designed for minimal restriction to maximize horsepower

Emission Standards

Complies with Euro 6 and EPA Tier 3 standards
CO2 Emissions: 130 g/km (combined cycle)
NOx Emissions: < 0.05 g/km
Particulate Matter: < 0.005 g/km
Equipped with dual oxygen sensors for precise monitoring

Note: The exhaust system is engineered to meet stringent global emission regulations.

Maintenance and Service

Guidelines for maintaining and servicing the BMW X1 exhaust system, including inspection intervals and common issues.

Inspection Intervals

Visual Inspection: Every 15,000 km or 12 months
Emission System Check: Every 30,000 km or 24 months
Catalytic Converter Efficiency Test: Every 60,000 km
Muffler and Pipe Integrity Check: Every 30,000 km
Oxygen Sensor Replacement: Every 100,000 km

Common Issues

Corrosion at pipe joints in high-humidity environments
Cracked welds due to thermal stress
Clogged catalytic converter from oil or coolant contamination
Excessive noise from damaged muffler internals
Faulty oxygen sensors causing check engine light

Note: Regular maintenance can prevent most common exhaust system issues.

Search Specifications

Search by specification name, value, or description

Component Specifications

General Specifications

Material: Stainless steel

System Type: Single exhaust with dual tailpipes

Emission Standard: Euro 6

Catalytic Converter Type: Three-way catalytic converter

Part Number: 18307585273

Exhaust Manifold

Material: Cast iron

Bolt Torque: 25 Nm

Gasket Part Number: 11627548921

Heat Shield Part Number: 11627548922

Catalytic Converter

Type: Three-way catalytic converter

Substrate Material: Ceramic

Precious Metals

Platinum
Palladium
Rhodium

Operating Temperature: 400-800 °C

Part Number: 18307585274

Muffler

Type: Chambered muffler

Material: Stainless steel

Dimensions: 600 mm x 300 mm x 200 mm

Weight: 8.5 kg

Part Number: 18307585275

Tailpipes

Quantity: 2

Diameter: 90 mm

Material: Stainless steel

Finish: Chrome-plated

Part Number: 18307585276

Oxygen Sensors

Quantity: 2

Type: Wideband zirconia sensor

Operating Temperature: -40 to 900 °C

Part Number: 11787548923

Location

Pre-catalytic converter
Post-catalytic converter

Exhaust Pipes

Diameter: 50 mm

Material: Stainless steel

Wall Thickness: 1.5 mm

Flex Pipe Part Number: 18307585277

Mounting System

Rubber Hangers: 4

Hanger Material: Heat-resistant rubber

Bracket Material: Steel

Bracket Part Number: 18307585278

Emission Control

EGR System: Yes

DPF System: No

SCR System: No

Evaporative Emission Control: Yes

Diagnostic Specifications

OBD2 Compliance: Yes

Fault Codes

P0420
P0430
P0135
P0141

Sensor Response Time: 100 ms

Diagnostic Tool Compatibility

BMW ISTA
Generic OBD2 scanners

Service Information Service

Detailed service requirements and schedules for the exhaust system

30000

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

Replace oxygen sensors if fault codes are present

60000

Inspect and replace exhaust hangers if necessary
Check catalytic converter efficiency
Inspect muffler and tailpipes for corrosion

Use only BMW-approved parts for replacements

100000

Replace oxygen sensors as preventive maintenance
Inspect and replace flex pipe if necessary
Perform full exhaust system inspection

Ensure all bolts and brackets are torqued to specifications

Frequently Asked Questions

Find answers to common questions about torque specifications

What is the exhaust system configuration for the 2015-2021 BMW X1?

The 2015-2021 BMW X1 features a dual exhaust system with a single tailpipe on each side. The system includes a catalytic converter, muffler, and resonator, designed to optimize exhaust flow and reduce emissions. The exhaust pipe diameter is 60mm for the 2.0L turbocharged engine variants.

What type of catalytic converter is used in the BMW X1 exhaust system?

The BMW X1 uses a three-way catalytic converter with a ceramic monolith substrate. It is designed to reduce nitrogen oxides (NOx), carbon monoxide (CO), and hydrocarbons (HC) to meet Euro 6 emission standards. The converter operates at temperatures between 400°C and 800°C for optimal efficiency.

How often should the exhaust system be inspected?

BMW recommends inspecting the exhaust system every 30,000 miles or 24 months, whichever comes first. This includes checking for leaks, corrosion, and damage to the catalytic converter, muffler, and exhaust pipes. Regular inspections ensure compliance with emission standards and prevent performance issues.

Can aftermarket exhaust systems be installed on the BMW X1?

Yes, aftermarket exhaust systems can be installed, but they must comply with local emission regulations and BMW's technical specifications. Using non-genuine parts may void the vehicle's warranty and affect performance. Always consult a certified BMW technician before making modifications.

What is the torque specification for exhaust manifold bolts?

The exhaust manifold bolts on the 2015-2021 BMW X1 should be torqued to 25 Nm (18.4 lb-ft) in a crisscross pattern to ensure even pressure distribution. Over-tightening can damage the manifold, while under-tightening may cause exhaust 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 X1 Exhaust System Service Manual

Coming Soon

Official BMW service manual detailing exhaust system maintenance, repair procedures, and specifications for the 2015-2021 X1.

Emission Standards and Compliance Guide

Coming Soon

A comprehensive guide to Euro 6 emission standards and how the BMW X1 exhaust system complies with these regulations.

Exhaust System Troubleshooting Guide

Coming Soon

Step-by-step troubleshooting guide for common exhaust system issues, including noise, leaks, and performance degradation.

Genuine BMW Exhaust Parts Catalog

Coming Soon

Catalog of genuine BMW exhaust components, including catalytic converters, mufflers, and pipes, with part numbers and compatibility details.

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.