BMW 340i 2019-present Exhaust Specifications
Explore the detailed technical specifications for the 2019-Present BMW 340i exhaust system, including OEM components, materials, dimensions, and emissions compliance. Ideal for technicians and enthusiasts.
Overview Specifications
Comprehensive description of the exhaust specifications for the 2019-Present BMW 340i, 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 documentation using the table of contents or section headers. Each major section is divided into subsections for easy access to specific details.
Key Specifications
Exhaust Pipe Diameter
70 mm
Catalytic Converter Efficiency
>98% NOx reduction
Muffler Weight
8.2 kg
Total Exhaust System Length
3.2 meters
Sound Pressure Level
72 dB at 3000 RPM
Available Specifications
Exhaust System Overview
This section provides an overview of the BMW 340i's exhaust system, including its design, materials, and key components.
Exhaust System Overview
This section provides an overview of the BMW 340i's exhaust system, including its design, materials, and key components.
System Design and Layout
- Dual exhaust system with twin tailpipes
- Stainless steel construction for durability and corrosion resistance
- Optimized flow path for reduced backpressure
- Integrated catalytic converters for emissions control
Key Components
- Primary and secondary catalytic converters
- Resonator and muffler assembly
- Exhaust tips with chrome finish
- Oxygen sensors for precise air-fuel ratio monitoring
Note: The exhaust system is designed to meet Euro 6 emissions standards.
Exhaust Pipe Specifications
Detailed specifications for the exhaust pipes, including dimensions, materials, and performance characteristics.
Exhaust Pipe Specifications
Detailed specifications for the exhaust pipes, including dimensions, materials, and performance characteristics.
Pipe Dimensions
- Main exhaust pipe diameter: 70 mm
- Tailpipe diameter: 90 mm
- Wall thickness: 1.5 mm
- Total system length: 3.2 meters
Material and Construction
- High-grade stainless steel (AISI 409)
- TIG welding for seamless joints
- Heat-resistant coating for thermal management
- Weight: 22.5 kg (complete system)
Catalytic Converter Specifications
Technical details about the catalytic converters, including their design, efficiency, and compliance with emissions standards.
Catalytic Converter Specifications
Technical details about the catalytic converters, including their design, efficiency, and compliance with emissions standards.
Primary Catalytic Converter
- Ceramic substrate with 400 cells per square inch
- Platinum, palladium, and rhodium coating
- Operating temperature range: 400°C to 800°C
- Efficiency: >98% for NOx reduction
Secondary Catalytic Converter
- Located downstream of the primary converter
- Additional NOx and CO reduction
- Integrated with the resonator assembly
- Weight: 4.8 kg
Note: Both converters are monitored by the vehicle's onboard diagnostics system.
Muffler and Resonator
Details about the muffler and resonator, including their design, acoustic performance, and integration with the exhaust system.
Muffler and Resonator
Details about the muffler and resonator, including their design, acoustic performance, and integration with the exhaust system.
Muffler Design
- Chambered design for noise reduction
- Internal baffles for optimized flow
- Sound pressure level: 72 dB at 3000 RPM
- Weight: 8.2 kg
Resonator Specifications
- Helmholtz resonator design
- Reduces specific frequency ranges for a refined exhaust note
- Integrated with the secondary catalytic converter
- Weight: 3.5 kg
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Component Specifications
General Specifications
- Material
- Stainless steel
- System Type
- Twin-pipe exhaust system with dual tailpipes
- Emission Standard
- Euro 6d-TEMP
- Part Number
- 18307653789
- Weight
- 22.5 kg
Exhaust Manifold
- Material
- Cast iron
- Part Number
- 11627586935
- Bolt Torque
- 25 Nm
- Gasket Material
- Graphite
- Gasket Part Number
- 11627586936
Catalytic Converter
- Type
- Three-way catalytic converter
- Part Number
- 18307653790
- Substrate Material
- Ceramic
- Precious Metals
-
- Platinum
- Palladium
- Rhodium
- Operating Temperature
- 400-800 °C
- Efficiency
- >95%
Resonator
- Material
- Stainless steel
- Part Number
- 18307653791
- Diameter
- 80 mm
- Length
- 450 mm
- Function
- Reduces exhaust noise and drone
Muffler
- Material
- Stainless steel
- Part Number
- 18307653792
- Diameter
- 90 mm
- Length
- 600 mm
- Sound Level
- 72 dB at 3000 rpm
- Design
- Chambered with perforated tubes
Tailpipes
- Material
- Chrome-plated stainless steel
- Diameter
- 80 mm
- Length
- 300 mm
- Part Number
- 18307653793
- Finish
- Polished
Oxygen Sensors
- Type
- Wideband lambda sensor
- Part Number
- 11787586934
- Location
-
- Pre-catalytic converter
- Post-catalytic converter
- Operating Temperature
- -40 to 900 °C
- Response Time
- <100 ms
Exhaust Flaps
- Type
- Electronically controlled
- Part Number
- 18307653794
- Actuation
- Electric motor
- Purpose
- Adjusts exhaust sound and backpressure
- Operating Range
- 0-90 degrees
Mounting System
- Hangers
- Material: Rubber with steel corePart Number: 18307653795Quantity: 4
- Brackets
- Material: Stainless steelPart Number: 18307653796Bolt Torque: 30 Nm
Thermal Management
- Heat Shields
- Material: Aluminized steelPart Number: 18307653797Thickness: 1.5 mm
- insulation
- Material: FiberglassPart Number: 18307653798Thickness: 10 mm
Service Information Service
Detailed service requirements and schedules for the exhaust system
- Inspect exhaust system for leaks and damage
- Check mounting system for wear and tightness
- Inspect oxygen sensors for proper operation
Replace oxygen sensors if fault codes are present
- Replace oxygen sensors
- Inspect catalytic converter for efficiency
- Check exhaust flaps for proper operation
Use BMW-approved diagnostic tools for sensor replacement
- Inspect and replace exhaust hangers if necessary
- Check heat shields for integrity
- Inspect entire exhaust system for corrosion
Replace any corroded components to prevent leaks
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What is the diameter of the exhaust pipes on the 2019-Present BMW 340i?
What is the diameter of the exhaust pipes on the 2019-Present BMW 340i?
The 2019-Present BMW 340i features dual exhaust pipes with a diameter of 80mm (3.15 inches) each. This design ensures optimal exhaust flow and performance.
Q2 What type of exhaust system does the BMW 340i use?
What type of exhaust system does the BMW 340i use?
The BMW 340i is equipped with a dual-branch stainless steel exhaust system, including a sport-tuned muffler and electronically controlled exhaust flap for enhanced sound and performance.
Q3 How does the exhaust flap system work on the BMW 340i?
How does the exhaust flap system work on the BMW 340i?
The exhaust flap system is electronically controlled and adjusts based on driving conditions. It opens during aggressive acceleration or Sport mode to reduce backpressure and enhance sound, and closes during cruising for improved fuel efficiency and reduced noise.
Q4 What is the recommended maintenance schedule for the exhaust system?
What is the recommended maintenance schedule for the exhaust system?
BMW recommends inspecting the exhaust system every 30,000 miles or 3 years, whichever comes first. This includes checking for leaks, corrosion, and ensuring all mounting points and hangers are secure.
Q5 Can aftermarket exhaust systems void the BMW warranty?
Can aftermarket exhaust systems void the BMW warranty?
Installing an aftermarket exhaust system may void the warranty if it is determined to have caused damage to the vehicle. Always consult your BMW dealership or warranty documentation before making modifications.
Q6 What is the backpressure specification for the BMW 340i exhaust system?
What is the backpressure specification for the BMW 340i exhaust system?
The backpressure specification for the BMW 340i exhaust system is designed to operate within a range of 0.5 to 1.2 psi under normal driving conditions. This ensures optimal engine performance and 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 340i Exhaust System Technical Manual
Coming SoonOfficial technical manual detailing the exhaust system components, specifications, and maintenance procedures for the 2019-Present BMW 340i.
BMW Genuine Parts Catalog
Coming SoonAccess the official BMW parts catalog to find genuine exhaust components and related parts for the 340i.
BMW Service and Warranty Guide
Coming SoonComprehensive guide covering service intervals, warranty terms, and implications of modifications for the BMW 340i.
BMW Exhaust System Maintenance Tips
Coming SoonA detailed guide on maintaining the exhaust system, including inspection tips and common issues to look out for.
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