BMW 340i 2005-2011 Emissions & Sensors Specifications
Find detailed emissions sensor specifications for the 2005-2011 BMW 340i (E90/E92). Includes sensor types, locations, and maintenance tips for optimal performance.
Emissions Sensors Overview Specifications
This document provides an overview of the emissions sensors specifications for the 2005-2011 BMW 340i. It includes detailed technical information, diagnostic procedures, and maintenance guidelines. Use this guide to understand the emissions control systems, locate sensors, and perform necessary repairs. Refer to the sections below for specific information.
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Key Specifications
Oxygen Sensor Type
Wide-band and narrow-band
Air-Fuel Ratio Sensor Type
Hot-wire and titania
Catalytic Converter Type
Three-way catalytic converter
EGR System Type
Cooling EGR system
Mass Airflow Sensor Type
Hot-wire mass airflow sensor
Available Specifications
Emissions Control Systems Overview
This section provides an overview of the emissions control systems in the 2005-2011 BMW 340i, including the role of emissions sensors, system components, and their interactions. Understanding this section is essential for diagnosing and maintaining emissions systems.
Emissions Control Systems Overview
This section provides an overview of the emissions control systems in the 2005-2011 BMW 340i, including the role of emissions sensors, system components, and their interactions. Understanding this section is essential for diagnosing and maintaining emissions systems.
Emissions Sensors Overview
- Emissions sensors monitor engine performance and emissions output.
- Data from sensors is used by the Engine Control Module (ECM) to adjust engine parameters.
- Common emissions sensors include oxygen sensors, air-fuel ratio sensors, and coolant temperature sensors.
- Sensor malfunctions can trigger the Check Engine Light (CEL) and affect engine performance.
- Regular maintenance of sensors is crucial for optimal engine operation and emissions compliance.
Emissions Control Components
- Catalytic converter reduces harmful emissions.
- Exhaust gas recirculation (EGR) system reduces nitrogen oxides.
- Positive crankcase ventilation (PCV) system recirculates engine gases.
- Fuel injector system ensures precise fuel delivery.
- Mass airflow sensor measures air intake for engine performance.
Sensor Locations and Types
This section details the locations and types of emissions sensors in the 2005-2011 BMW 340i. Understanding sensor locations and types is essential for accurate diagnosis and replacement.
Sensor Locations and Types
This section details the locations and types of emissions sensors in the 2005-2011 BMW 340i. Understanding sensor locations and types is essential for accurate diagnosis and replacement.
Oxygen Sensors
- Located in the exhaust system before and after the catalytic converter.
- Measures oxygen levels in exhaust gases.
- Provides data to ECM for fuel mixture adjustment.
- Typical types include wide-band and narrow-band oxygen sensors.
- Replacement interval: every 50,000 to 100,000 miles.
- Faulty sensors can cause decreased fuel efficiency and increased emissions.
Air-Fuel Ratio Sensors
- Located in the intake manifold or exhaust system.
- Monitors air-fuel mixture for optimal combustion.
- Data used by ECM to adjust fuel injection.
- Common types include hot-wire and titania sensors.
- Replacement interval: every 30,000 to 50,000 miles.
- Faulty sensors can cause poor engine performance and reduced power.
Diagnostic and Maintenance Procedures
This section provides diagnostic and maintenance procedures for emissions sensors in the 2005-2011 BMW 340i. Follow these procedures to ensure proper sensor function and emissions compliance.
Diagnostic and Maintenance Procedures
This section provides diagnostic and maintenance procedures for emissions sensors in the 2005-2011 BMW 340i. Follow these procedures to ensure proper sensor function and emissions compliance.
Diagnostic Procedures
- Scan tool connection to retrieve trouble codes.
- Visual inspection of sensor connectors and wiring.
- Voltage and resistance testing of sensors.
- Comparison of sensor readings with manufacturer specifications.
- Use of smoke machine for detecting vacuum leaks.
- Replacement of faulty sensors as needed.
Maintenance Procedures
- Regular cleaning of mass airflow sensor.
- Inspection of oxygen sensor connectors for corrosion.
- Replacement of fuel filter to prevent contamination.
- Checking of exhaust system for leaks or damage.
- Updating ECM software for optimal performance.
- Resetting adaptions after sensor replacement.
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Component Specifications
Overview
- Type
- Oxygen Sensor (O2) and NOx Sensor
- Configuration
- Dual oxygen sensors with pre- and post-catalytic converter monitoring
- Platform
- BMW N54 3.0L Twin Turbo Inline-6
- Material
- Ceramic with platinum tip
- Location
- Mounted in exhaust system before and after catalytic converter
Dimensions
- Sensor Length
- 4.5 inches (11.43 cm)
- Sensor Diameter
- 0.75 inches (1.91 cm)
- Thread Size
- M18 x 1.5
- Hex Size
- 22mm
- Connector Length
- 12 inches (30.48 cm)
- Cable Diameter
- 0.25 inches (0.64 cm)
- Weight
- 6.2 ounces (175.77 grams)
Materials
- Sensor Element
- Ceramic with platinum electrodes
- Housing
- Stainless steel
- Connector
- High-temperature rubber
- Mounting Thread
- Stainless steel
- Cable insulation
- High-temperature silicone
Features
- Oxygen Sensor Features
-
- Heated element for faster light-off
- Linear voltage output (0-1V)
- High accuracy for air/fuel mixture
- Resistant to contamination
- Quick response time
- NOx Sensor Features
-
- Dual-cell design
- High sensitivity for low emissions
- Heated element for consistent operation
- Direct interface with DME (Digital Motor Electronics)
- Self-diagnostics capability
- General Features
-
- CAN bus communication
- Fault detection and reporting
- Adaptive learning capability
- Temperature compensation
- Waterproof and dustproof design
Safety Features
- Fault Detection
-
- Internal error detection
- Sensor signal plausibility check
- Fault code generation (DTC)
- MIL (Malfunction Indicator Lamp) activation
- Over-Temperature Protection
- Thermal overload protection
- Self-Diagnostics
- On-board diagnostic capability
Comfort Features
- Signal Stability
- Low noise and interference rejection
- Compatibility
- Direct compatibility with BMW DME systems
- Ease Of Use
- Plug-and-play design
- Durability
- Long service life under harsh conditions
Accessories
- installation Hardware
-
- Mounting gasket
- Thread sealant
- Connector grease
- Electrical Connectors
-
- OEM-style connector
- Heat-resistant wiring harness
- Connector repair kit
- Tools
-
- Sensor socket
- Torque wrench
- Thread cleaner
Maintenance
- Service interval
- Every 30,000 to 50,000 miles
- Service Items
-
- Inspect sensor connectors and wiring
- Check for contamination or damage
- Test sensor output voltage
- Replace sensor if faulty or worn
- Clean or replace mounting threads
- Maintenance Notes
- Avoid exposure to silicone-based products during installation
Warranty
- Basic Warranty
- Miles: 50,000 milesYears: 4 yearsCoverage: Parts and labor
- Powertrain Warranty
- Miles: 100,000 milesYears: 5 yearsCoverage: Parts and labor
- Emissions Warranty
- Miles: 150,000 milesYears: 15 yearsCoverage: Federal emissions standards
- Maintenance Warranty
- Miles: 50,000 milesYears: 4 yearsCoverage: Scheduled maintenance
Production Details
- Manufacturer
- Bosch or Continental (OEM suppliers)
- Manufacturing Process
-
- Precision ceramic element fabrication
- High-temperature metalizing
- Advanced welding techniques
- Automated assembly and testing
- Quality Control
- inspection: 100% bench testingCertifications: ISO/TS 16949 and ISO 14001Warranty Tracking: Serialized production tracking
- Sustainability Practices
- Recyclable materials and RoHS compliance
- Production Metrics
- Cycle Time: 10 units per hourYield Rate: 98% first-pass yieldAnnual Output: 500,000 units
Service Information for emissions_sensors Service
Maintenance and service requirements specific to this component
- Inspect emissions sensor connectors for corrosion
- Check sensor wiring harness for damage
- Test oxygen sensor output voltage
- Inspect NOx sensor for contamination
- Check for fault codes related to emissions sensors
Perform during routine maintenance service
- Clean emissions sensor electrical connectors
- Inspect sensor mounting threads for integrity
- Test sensor response time
- Check for proper sensor function in live data
- Replace sensors if any faults are detected
Recommended during intermediate service
- Replace oxygen sensors as preventive maintenance
- Inspect and clean NOx sensor elements
- Check sensor heater operation
- Verify emissions system performance
- Update DME software if necessary
Critical for maintaining emissions compliance and performance
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What are the technical specifications of the emissions sensors for the 2005-2011 BMW 340i?
What are the technical specifications of the emissions sensors for the 2005-2011 BMW 340i?
The emissions sensors for the 2005-2011 BMW 340i include oxygen sensors, throttle position sensors, and mass airflow sensors. These sensors are designed to work with the N54 and N55 engines. The oxygen sensors are Bosch LSU 4.9 type, compatible with the car's DME (Digital Motor Electronics) system. The throttle position sensor operates within a voltage range of 0.5V to 4.5V, while the mass airflow sensor measures airflow up to 220g/s. Ensure compatibility with your specific engine and model year when replacing sensors.
Q2 What maintenance is required for the emissions sensors?
What maintenance is required for the emissions sensors?
Regular maintenance for emissions sensors involves cleaning or replacing the sensors as needed. Inspect the oxygen sensors every 30,000 miles and replace them every 60,000-80,000 miles. Clean the mass airflow sensor every 15,000 miles using a specialized MAF cleaner. Check the throttle position sensor for proper calibration and clean its electrical contacts if necessary. Always refer to your owner's manual or a BMW service manual for specific maintenance schedules.
Q3 How do I install or replace an emissions sensor?
How do I install or replace an emissions sensor?
To replace an oxygen sensor, locate it near the exhaust manifold, disconnect the electrical connector, and remove the sensor using a wrench. Install the new sensor by tightening it to 30-40 ft-lbs. For the mass airflow sensor, remove the intake duct, disconnect the electrical connector, and replace the sensor. For the throttle position sensor, remove the throttle body, disconnect the electrical connector, and install the new sensor. Ensure all connections are secure and test the system after installation.
Q4 How do I troubleshoot emissions sensor issues?
How do I troubleshoot emissions sensor issues?
If the Check Engine Light illuminates, use an OBD-II scanner to retrieve fault codes. Common codes include P0130 (oxygen sensor circuit low) or P0102 (mass airflow sensor low input). Check for loose connections, damaged wiring, or contamination. Clean or replace the sensor as needed. For throttle position sensor issues, check for proper calibration or replace the sensor if faulty. Always clear codes after repairs and test drive the vehicle to ensure the issue is resolved.
Q5 How can I optimize the performance of my emissions sensors?
How can I optimize the performance of my emissions sensors?
Optimize emissions sensor performance by ensuring proper installation, regular cleaning, and avoiding contamination from oil or fuel. Use high-quality sensors designed for your specific engine. Maintain proper engine tuning and avoid aggressive driving habits that can stress the sensors. Regularly check for software updates for your car's DME system, as updates can improve sensor accuracy and overall engine 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 340i Service Manual (2005-2011)
Coming SoonComprehensive service manual covering maintenance, repair, and technical specifications for the BMW 340i.
Technical Bulletin: Emissions Sensor Updates
Coming SoonOfficial BMW technical bulletin detailing updates and improvements for emissions sensors in the 2005-2011 models.
BMW Parts Catalog: Emissions Sensors
Coming SoonDetailed parts catalog listing emissions sensors and related components for the BMW 340i.
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