BMW X4 2018-present Exhaust Specifications
Comprehensive technical specifications for the 2018-Present BMW X4 exhaust system, including detailed information on components, materials, torque values, and emissions compliance.
Overview Specifications
Comprehensive description of the exhaust specifications for the 2018-Present BMW X4, including key features, measurements, and technical details. This section provides detailed insights into the exhaust system's design, components, and performance characteristics.
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
70 mm
Tailpipe Diameter
90 mm
Catalytic Converter Temperature
300°C to 900°C
Exhaust System Length
4.2 meters
Oxygen Sensor Voltage
0.1 V to 0.9 V
Available Specifications
Exhaust System Overview
This section provides an overview of the BMW X4's exhaust system, including its design, materials, and key components.
Exhaust System Overview
This section provides an overview of the BMW X4's exhaust system, including its design, materials, and key components.
Exhaust System Design
- Dual exhaust system with chrome-plated tailpipes
- Stainless steel construction for durability and corrosion resistance
- Optimized for reduced backpressure and improved performance
- Integrated with the vehicle's emission control system
Key Components
- Twin-scroll turbocharger for efficient exhaust gas flow
- High-performance catalytic converters for reduced emissions
- Resonators and mufflers for noise reduction
- Exhaust flap system for dynamic sound control
Note: The exhaust flap system adjusts the exhaust note based on driving mode and engine load.
Exhaust Pipe Specifications
This section details the dimensions, materials, and configurations of the exhaust pipes in the BMW X4.
Exhaust Pipe Specifications
This section details the dimensions, materials, and configurations of the exhaust pipes in the BMW X4.
Exhaust Pipe Dimensions
- Main exhaust pipe diameter: 70 mm
- Tailpipe diameter: 90 mm
- Total exhaust system length: 4.2 meters
- Wall thickness: 1.5 mm
Material and Construction
- Constructed from high-grade stainless steel
- TIG welding for seamless joints
- Heat-resistant coatings for thermal management
- Lightweight design for improved fuel efficiency
Emission Control System
This section covers the emission control components integrated into the exhaust system, including catalytic converters and sensors.
Emission Control System
This section covers the emission control components integrated into the exhaust system, including catalytic converters and sensors.
Catalytic Converters
- Two catalytic converters per exhaust bank
- Ceramic substrate with precious metal coating
- Operating temperature range: 300°C to 900°C
- Compliant with Euro 6 emission standards
Oxygen Sensors
- Two pre-catalytic and two post-catalytic oxygen sensors
- Wideband lambda sensors for precise air-fuel ratio control
- Operating voltage: 0.1 V to 0.9 V
- Integrated with the engine control unit (ECU)
Note: Oxygen sensors are critical for maintaining optimal combustion efficiency and emission control.
Exhaust Sound and Performance
This section explores the exhaust system's sound characteristics and performance enhancements.
Exhaust Sound and Performance
This section explores the exhaust system's sound characteristics and performance enhancements.
Sound Tuning
- Active Sound Design for customizable exhaust notes
- Exhaust flap system for dynamic sound modulation
- Sound frequency range: 80 Hz to 400 Hz
- Sport mode enhances exhaust sound for a more aggressive tone
Performance Impact
- Reduced backpressure for improved engine efficiency
- Enhanced exhaust flow for increased horsepower
- Weight reduction contributes to better handling
- Optimized for both city and highway driving conditions
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Component Specifications
General Specifications
- Material
- Stainless steel
- System Type
- Dual exhaust with dual tailpipes
- Emission Standard
- Euro 6d-TEMP
- Part Number
- 18307654321
- Weight
- 28.5 kg
Exhaust Manifold
- Material
- Cast iron
- Part Number
- 18307654322
- Bolt Torque
- 25 Nm
- Gasket Material
- Graphite
- Heat Shield Material
- Aluminum
Catalytic Converter
- Type
- Three-way catalytic converter
- Part Number
- 18307654323
- Substrate Material
- Ceramic
- Precious Metals
-
- Platinum
- Palladium
- Rhodium
- Operating Temperature
- 400-800 °C
- Efficiency
- >95%
Muffler
- Type
- Dual-chamber muffler
- Part Number
- 18307654324
- Material
- Stainless steel
- Noise Reduction
- 25 dB
- internal Baffles
- 4
- Mounting Type
- Rubber hangers
Exhaust Pipes
- Diameter
- 70 mm
- Material
- Stainless steel
- Part Number
- 18307654325
- Wall Thickness
- 1.5 mm
- Flex Pipe included
- true
- Flex Pipe Material
- Stainless steel braided
Oxygen Sensors
- Type
- Wideband zirconia sensor
- Part Number
- 18307654326
- Location
-
- Pre-catalytic converter
- Post-catalytic converter
- Operating Temperature
- -40 to 900 °C
- Response Time
- <100 ms
- Voltage Range
- 0.1-0.9 V
Exhaust Flap
- Type
- Electronically controlled
- Part Number
- 18307654327
- Actuator Type
- Electric motor
- Operating Temperature
- -40 to 150 °C
- Control Signal
- PWM
- Default Position
- Closed at idle
Heat Shields
- Material
- Aluminum
- Part Number
- 18307654328
- Thickness
- 1.2 mm
- Mounting Type
- Bolted
- Thermal Conductivity
- 205 W/m·K
Exhaust Mounts
- Type
- Rubber hangers
- Part Number
- 18307654329
- Quantity
- 4
- Load Capacity
- 15 kg each
- Durometer
- 70 Shore A
- Temperature Range
- -40 to 120 °C
Diagnostic Specifications
- Error Codes
-
- P0420
- P0430
- P0135
- P0141
- Diagnostic Tool
- BMW ISTA
- Sensor Check interval
- Every 30,000 miles
- Exhaust Backpressure Limit
- 1.5 bar
- Leak Detection Method
- Smoke test
Service Information Service
Detailed service requirements and schedules for the exhaust system
- Inspect exhaust system for leaks
- Check oxygen sensor operation
- Inspect catalytic converter for damage
- Verify exhaust flap functionality
Replace oxygen sensors if error codes are present
- Replace oxygen sensors
- Inspect and replace exhaust mounts if necessary
- Check heat shields for corrosion
- Verify exhaust backpressure
Use OEM parts for replacements
- Inspect catalytic converter efficiency
- Replace exhaust gaskets
- Check exhaust pipe integrity
- Inspect muffler for internal damage
Perform smoke test for leak detection
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What is the exhaust system configuration for the 2018-Present BMW X4?
What is the exhaust system configuration for the 2018-Present BMW X4?
The 2018-Present BMW X4 features a dual exhaust system with a twin-pipe design. The system includes two catalytic converters, one for each bank of the engine, and is constructed from high-grade stainless steel to resist corrosion. The exhaust diameter measures 70mm for the M40i trim and 65mm for the xDrive30i trim.
Q2 What is the recommended maintenance schedule for the BMW X4 exhaust system?
What is the recommended maintenance schedule for the BMW X4 exhaust system?
BMW recommends inspecting the exhaust system every 15,000 miles or 12 months, whichever comes first. Key checks include inspecting for leaks, corrosion, and ensuring all mounting brackets and hangers are secure. The catalytic converters should also be checked for proper function during routine emissions testing.
Q3 Can I replace the BMW X4 exhaust system with an aftermarket option?
Can I replace the BMW X4 exhaust system with an aftermarket option?
While aftermarket exhaust systems are available, BMW strongly recommends using genuine BMW parts to ensure compatibility, performance, and warranty compliance. Aftermarket systems may void the vehicle's warranty and could affect emissions compliance and vehicle performance.
Q4 What are the torque specifications for the exhaust manifold bolts on the BMW X4?
What are the torque specifications for the exhaust manifold bolts on the BMW X4?
The exhaust manifold bolts on the 2018-Present BMW X4 should be torqued to 25 Nm (18.4 lb-ft) for the xDrive30i trim and 30 Nm (22.1 lb-ft) for the M40i trim. Always use a calibrated torque wrench and follow the tightening sequence specified in the service manual.
Q5 How do I identify a failing catalytic converter on the BMW X4?
How do I identify a failing catalytic converter on the BMW X4?
Symptoms of a failing catalytic converter include reduced engine performance, increased exhaust emissions, a sulfur-like smell, and the illumination of the Check Engine Light (CEL). Diagnostic trouble codes (DTCs) such as P0420 or P0430 may also indicate catalytic converter inefficiency.
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 Service Manual
Coming SoonOfficial BMW service manual detailing exhaust system maintenance, repair procedures, and torque specifications.
Genuine BMW Exhaust Parts Catalog
Coming SoonCatalog of genuine BMW exhaust components, including part numbers and compatibility information for the 2018-Present X4.
BMW X4 Emissions System Overview
Coming SoonTechnical overview of the BMW X4 emissions system, including the role of the catalytic converter and oxygen sensors.
Exhaust System Safety and Installation Guide
Coming SoonStep-by-step guide for safely removing and installing the BMW X4 exhaust system, including safety precautions and tool requirements.
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Technical Information
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