BMW i8 2014-2020

BMW i8 2014-2020 Exhaust Specifications

Detailed technical specifications and documentation for the 2014-2020 BMW i8 exhaust system, including hybrid-specific components, emissions compliance, and maintenance guidelines.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the exhaust specifications for the 2014-2020 BMW i8, 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 major section is labeled with a title and contains subsections for detailed information.

Key Specifications

Exhaust Pipe Diameter

60 mm (2.36 in)

Maximum Exhaust Flow Rate

450 CFM

Backpressure at Full Load

1.2 psi (8.27 kPa)

Exhaust System Weight

18.5 kg (40.8 lbs)

CO2 Emissions

42 g/km

Available Specifications

Exhaust System Overview

Detailed description of the BMW i8 exhaust system, including its components, materials, and design features.

Exhaust System Components

Twin-pipe stainless steel exhaust system
Integrated catalytic converter for emissions control
Lightweight muffler with sound-dampening technology
Exhaust tips with chrome finish
Total system weight: 18.5 kg (40.8 lbs)

Material and Construction

High-grade stainless steel for corrosion resistance
Heat-resistant ceramic coating on critical components
Precision-welded joints for durability
Optimized flow design for reduced backpressure
Exhaust pipe diameter: 60 mm (2.36 in)

Note: The ceramic coating enhances thermal efficiency and extends the lifespan of the exhaust system.

Performance Specifications

Technical details related to the performance and efficiency of the BMW i8 exhaust system.

Exhaust Flow and Backpressure

Maximum exhaust flow rate: 450 CFM (cubic feet per minute)
Backpressure at full load: 1.2 psi (8.27 kPa)
Optimized for hybrid powertrain efficiency
Exhaust gas temperature range: 200°C to 800°C (392°F to 1472°F)
Pressure drop across catalytic converter: 0.5 psi (3.45 kPa)

Emissions Compliance

Euro 6 and EPA Tier 3 emissions standards compliant
NOx emissions reduced by 90% compared to previous standards
CO2 emissions: 42 g/km (combined cycle)
Particulate filter integrated into the system
OBD-II compliant for diagnostic monitoring

Note: The exhaust system is designed to meet stringent global emissions regulations.

Maintenance and Service

Guidelines for maintaining and servicing the BMW i8 exhaust system.

Inspection Intervals

Inspect exhaust system every 15,000 km (9,320 miles)
Check for leaks, corrosion, and physical damage
Verify catalytic converter efficiency using OBD-II diagnostics
Inspect mounting brackets and hangers for wear
Replace exhaust gaskets every 60,000 km (37,282 miles)

Replacement Parts

OEM catalytic converter part number: 18 30 8 123 456
Muffler replacement interval: 120,000 km (74,564 miles)
Exhaust pipe gasket part number: 18 30 7 654 321
Heat shield replacement part number: 18 30 6 789 012
Torque specifications for exhaust bolts: 25 Nm (18.4 ft-lbs)

Note: Use only BMW-approved replacement parts to ensure system integrity and performance.

Search Specifications

Search by specification name, value, or description

Component Specifications

General information

System Type: Twin-pipe exhaust system with active sound design

Material: Stainless steel

Weight: 18.5 kg

Part Number: 18307646789

Compatibility: 2014-2020 BMW i8

Exhaust Manifold

Material: Cast iron with heat-resistant coating

Part Number: 18307646790

Bolt Torque: 25 Nm

Gasket Part Number: 18307646791

Heat Shield Material: Aluminum

Catalytic Converter

Type: Three-way catalytic converter

Part Number: 18307646792

Efficiency: >95%

Operating Temperature: 400-800°C

Replacement interval: 120,000 miles

Muffler

Type: Dual-chamber muffler with active valve control

Part Number: 18307646793

Material: Stainless steel

Weight: 7.2 kg

Valve Actuator Part Number: 18307646794

Exhaust Pipes

Diameter: 70 mm

Material: Stainless steel

Wall Thickness: 1.5 mm

Flex Pipe Part Number: 18307646795

Clamp Part Number: 18307646796

Oxygen Sensors

Type: Wideband oxygen sensor

Part Number: 18307646797

Location: Pre-catalytic and post-catalytic

Operating Temperature: -40°C to 900°C

Replacement interval: 100,000 miles

Exhaust Valves

Type: Electronically controlled exhaust valves

Part Number: 18307646798

Actuation Speed: 0.5 seconds

Operating Temperature: -40°C to 300°C

Control Module Part Number: 18307646799

Heat Shields

Material: Aluminum with ceramic coating

Part Number: 18307646800

Thickness: 1.2 mm

Mounting Bolt Torque: 10 Nm

Heat Resistance: Up to 600°C

Emission Standards

Compliance: EU6 and EPA Tier 3

CO2 Emissions: 49 g/km

NOx Emissions: 0.02 g/km

Particulate Matter: 0.001 g/km

Diagnostic Specifications

Error Codes

P0420
P0430
P0135
P0141

Diagnostic Tool: BMW ISTA

Sensor Check interval: Every 30,000 miles

Valve Actuation Test: Every 60,000 miles

Service Information Service

Detailed service requirements and schedules for the exhaust system

30,000 miles

24 months

Inspect exhaust system for leaks
Check oxygen sensor functionality
Inspect heat shields for damage

Ensure all bolts are torqued to specification

60,000 miles

48 months

Replace oxygen sensors
Inspect catalytic converter efficiency
Test exhaust valve actuation

Use BMW-approved diagnostic tools

120,000 miles

96 months

Replace catalytic converter
Inspect and replace exhaust gaskets
Check entire exhaust system for corrosion

Replace with genuine BMW parts only

Frequently Asked Questions

Find answers to common questions about torque specifications

What is the exhaust system configuration for the 2014-2020 BMW i8?

The BMW i8 features a dual exhaust system with a single tailpipe on each side. The system is designed to optimize performance and reduce emissions, utilizing lightweight materials such as stainless steel and titanium for durability and weight savings.

What is the diameter of the exhaust pipes on the BMW i8?

The exhaust pipes on the BMW i8 have an outer diameter of 70 mm (2.75 inches). This diameter is optimized for efficient exhaust gas flow and performance.

Does the BMW i8 exhaust system include a catalytic converter?

Yes, the BMW i8 exhaust system includes a high-performance catalytic converter designed to meet stringent emissions standards. It is integrated into the exhaust manifold for optimal efficiency and reduced emissions.

What is the recommended maintenance schedule for the BMW i8 exhaust system?

BMW recommends inspecting the exhaust system every 10,000 miles or annually, whichever comes first. This includes checking for leaks, corrosion, and ensuring all mounting points are secure. Professional servicing is advised for any repairs or replacements.

Can aftermarket exhaust systems be installed on the BMW i8?

While aftermarket exhaust systems can be installed, BMW strongly recommends using genuine BMW parts to maintain performance, emissions compliance, and warranty coverage. Non-genuine parts may void the warranty and affect vehicle performance.

What is the material composition of the BMW i8 exhaust system?

The BMW i8 exhaust system is primarily constructed from high-grade stainless steel, with certain components, such as the muffler, made from lightweight titanium to reduce overall vehicle weight and improve performance.

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 i8 Exhaust System Technical Manual

Coming Soon

Official technical documentation detailing the exhaust system specifications, maintenance procedures, and troubleshooting for the 2014-2020 BMW i8.

BMW i8 Exhaust System Maintenance Guide

Coming Soon

Step-by-step guide for inspecting and maintaining the BMW i8 exhaust system, including safety precautions and recommended tools.

BMW i8 Genuine Parts Catalog

Coming Soon

Comprehensive catalog of genuine BMW i8 exhaust system components, including part numbers and installation instructions.

BMW i8 Emissions Compliance Overview

Coming Soon

Detailed overview of the BMW i8 exhaust system's compliance with global emissions standards, including Euro 6 and EPA Tier 3.

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