Subaru Subaru Impreza 2007-2011 Emissions & Sensors Specifications
Explore detailed technical specifications for the emissions sensors in the 2007-2011 Subaru Impreza. Learn about sensor types, locations, functions, and compatibility for diagnostics, repairs, and upgrades.
Overview Specifications
This document provides detailed specifications and technical information about the emissions sensors used in the 2007-2011 Subaru Impreza. It is designed to assist technicians, engineers, and enthusiasts in understanding the functionality, maintenance, and troubleshooting of these sensors. Use the search and navigation instructions to quickly locate specific information. The document is divided into sections covering sensor types, installation, diagnostics, and key specifications.
How to Use
Use the search bar to enter keywords related to emissions sensors, such as 'O2 sensor' or 'catalytic converter'. The search results will highlight relevant sections and subsections.
Navigate through the document using the table of contents. Each major section is divided into subsections, which can be accessed by clicking on the corresponding title. Use the quick reference section for a summary of key specifications.
Key Specifications
O2 Sensor Operating Temperature
600-800°C
Catalytic Converter Efficiency
≥ 90%
Sensor Voltage Range
0.1-0.9V
Sensor Replacement Interval
60,000-100,000 miles
Diagnostic Trouble Codes
P0130-P0167
Available Specifications
Sensor Types and Functions
This section covers the different types of emissions sensors used in the 2007-2011 Subaru Impreza, including their roles in monitoring and controlling exhaust emissions. Learn about the primary sensors and their integration with the vehicle's engine management system.
Sensor Types and Functions
This section covers the different types of emissions sensors used in the 2007-2011 Subaru Impreza, including their roles in monitoring and controlling exhaust emissions. Learn about the primary sensors and their integration with the vehicle's engine management system.
Oxygen (O2) Sensors
- Located in the exhaust system, upstream and downstream of the catalytic converter.
- Monitors oxygen levels in exhaust gases to optimize air-fuel ratio.
- Upstream sensor provides feedback for fuel injection adjustments.
- Downstream sensor checks catalytic converter efficiency.
- Typically uses zirconia or titania-based sensing elements.
- Replacement interval: 60,000-100,000 miles.
Catalytic Converter Sensors
- Monitors the efficiency of the catalytic converter.
- Detects harmful emissions like CO, NOx, and hydrocarbons.
- Works in conjunction with O2 sensors for optimal performance.
- Triggers a check engine light if emissions exceed limits.
- Requires periodic inspection for clogging or damage.
- Replacement typically needed after 100,000-150,000 miles.
Installation and Maintenance
This section provides guidelines for installing and maintaining emissions sensors in the 2007-2011 Subaru Impreza. It includes tips for proper installation, common maintenance practices, and troubleshooting tips to ensure optimal sensor performance.
Installation and Maintenance
This section provides guidelines for installing and maintaining emissions sensors in the 2007-2011 Subaru Impreza. It includes tips for proper installation, common maintenance practices, and troubleshooting tips to ensure optimal sensor performance.
Installation Guidelines
- Ensure the vehicle is cool before starting installation.
- Use anti-seize compound on sensor threads to prevent seizing.
- Tighten sensors to manufacturer-recommended torque specifications.
- Verify electrical connections are secure and free of corrosion.
- Reset the ECU after sensor replacement to clear error codes.
- Test the new sensor using a diagnostic tool.
Maintenance Tips
- Regularly inspect sensors for physical damage or contamination.
- Clean sensors with appropriate solvents if exposed to oil or coolant.
- Check wiring harnesses for wear or corrosion.
- Monitor engine performance for signs of sensor failure.
- Replace sensors proactively to avoid catalytic converter damage.
- Follow the vehicle's maintenance schedule for sensor checks.
Diagnostics and Troubleshooting
This section focuses on diagnosing and troubleshooting emissions sensor issues in the 2007-2011 Subaru Impreza. It includes common symptoms of sensor failure, diagnostic procedures, and solutions to common problems.
Diagnostics and Troubleshooting
This section focuses on diagnosing and troubleshooting emissions sensor issues in the 2007-2011 Subaru Impreza. It includes common symptoms of sensor failure, diagnostic procedures, and solutions to common problems.
Common Symptoms of Sensor Failure
- Check engine light illuminated with emissions-related codes.
- Poor fuel economy or reduced engine performance.
- Rough idling or hesitation during acceleration.
- Failed emissions test due to high pollutant levels.
- Unusual exhaust odor or excessive smoke.
- Inconsistent or erratic sensor readings.
Diagnostic Procedures
- Use an OBD-II scanner to retrieve error codes.
- Check live data for abnormal sensor readings.
- Perform a visual inspection of sensors and wiring.
- Test sensor voltage and resistance using a multimeter.
- Compare sensor readings to manufacturer specifications.
- Replace sensors if diagnostics confirm failure.
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Component Specifications
Overview
- Type
- Oxygen (O2) Sensors
- Configuration
- Upstream and Downstream
- Platform
- Subaru Impreza 2007-2011
- Material
- Zirconia Ceramic
- Location
- Exhaust Manifold and Catalytic Converter
Dimensions
- Sensor Length
- 3.15 inches (80 mm)
- Sensor Diameter
- 0.79 inches (20 mm)
- Thread Size
- M18 x 1.5
- Wire Length
- 23.62 inches (600 mm)
- Operating Temperature
- -40°F to 1562°F (-40°C to 850°C)
- Weight
- 0.22 lbs (100 g)
- Voltage Range
- 0.1V to 0.9V
Materials
- Sensor Element
- Zirconia Ceramic
- Housing
- Stainless Steel
- Wiring
- High-Temperature Silicone Insulation
- Connector
- Thermoplastic
Features
- Performance
-
- Wideband O2 sensing
- Fast response time (less than 100ms)
- High accuracy in lean and rich conditions
- Self-diagnostic capabilities
- Durability
-
- Resistant to thermal shock
- Corrosion-resistant housing
- Sealed against moisture and contaminants
- Compatibility
-
- Direct-fit for Subaru Impreza 2007-2011
- OEM and aftermarket support
- Compatible with ECU systems
- installation
-
- Plug-and-play design
- Pre-installed gasket
- No additional calibration required
- Environmental
-
- Low emissions compliance
- Recyclable materials
- Reduced fuel consumption
Safety Features
- Thermal Protection
-
- High-temperature insulation
- Overheat shutdown
- Electrical Safety
-
- Short-circuit protection
- Reverse polarity protection
- Mechanical Safety
-
- Vibration-resistant design
- Impact-resistant housing
Comfort Features
- Ease Of Use
-
- Clear fault codes via OBD-II
- Easy access for replacement
- Noise Reduction
-
- Quiet operation
- Minimal exhaust interference
- Longevity
-
- Extended lifespan (up to 100,000 miles)
- Stable performance over time
Accessories
- installation Tools
-
- O2 sensor socket
- Anti-seize compound
- Wire crimping tool
- Replacement Parts
-
- Gasket kit
- Wiring harness
- Connector seals
- Diagnostic Tools
-
- OBD-II scanner
- Multimeter
- Voltage tester
Maintenance
- Service interval
- Every 60,000 miles or 5 years
- Service Items
-
- Inspect sensor wiring
- Check for exhaust leaks
- Test sensor voltage output
- Clean sensor threads
- Replace if faulty
- Maintenance Notes
- Avoid using silicone-based sealants near the sensor.
Warranty
- Standard Warranty
- Miles: 36,000Years: 3Coverage: Defects in materials and workmanship
- Extended Warranty
- Miles: 100,000Years: 8Coverage: Sensor failure due to normal wear
- Emissions Warranty
- Miles: 80,000Years: 8Coverage: Federal emissions compliance
- Warranty Terms
- Proof of purchase and proper installation required.
Production Details
- Manufacturer
- Denso Corporation
- Manufacturing Process
-
- Precision ceramic molding
- Automated assembly
- Laser welding
- Quality Control
- Testing: Thermal cycling, Voltage accuracy, Durability under vibrationCertifications: ISO 9001, OEM standards
- Sustainability Practices
-
- Recyclable materials
- Energy-efficient production
- Reduced waste
- Production Metrics
- Annual Output: 2 million unitsDefect Rate: Less than 0.1%
Service Information for emissions_sensors Service
Maintenance and service requirements specific to this component
- Inspect sensor wiring for damage
- Check for exhaust leaks near the sensor
- Test sensor voltage output
- Clean sensor threads if accessible
Ensure the engine is cool before inspection.
- Replace upstream O2 sensor
- Test downstream O2 sensor
- Inspect catalytic converter efficiency
- Check ECU for fault codes
Use OEM or equivalent replacement parts.
- Replace both upstream and downstream sensors
- Inspect exhaust system for corrosion
- Perform full emissions system test
- Reset ECU after replacement
Critical to ensure emissions compliance.
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 Are the emissions sensors compatible with all 2007-2011 Subaru Impreza models?
Are the emissions sensors compatible with all 2007-2011 Subaru Impreza models?
The emissions sensors for the 2007-2011 Subaru Impreza are designed to be compatible with all trim levels, including the 2.5i, WRX, and STI models. These sensors are specifically calibrated for the EJ-series engines used in these vehicles. However, it is recommended to verify the part number with your vehicle's VIN to ensure proper compatibility, as slight variations may exist between model years and regions.
Q2 What maintenance is required for emissions sensors in a 2007-2011 Subaru Impreza?
What maintenance is required for emissions sensors in a 2007-2011 Subaru Impreza?
Emissions sensors in the 2007-2011 Subaru Impreza require minimal maintenance. Regularly inspect the sensors for damage or contamination, especially after driving in harsh conditions. Ensure the wiring harness and connectors are secure and free of corrosion. The sensors should be checked during routine emissions system inspections, typically every 30,000 miles or as recommended in your owner's manual.
Q3 How do I replace the emissions sensors on a 2007-2011 Subaru Impreza?
How do I replace the emissions sensors on a 2007-2011 Subaru Impreza?
To replace the emissions sensors, first, locate the faulty sensor (e.g., oxygen sensor or catalytic converter sensor). Disconnect the negative battery terminal for safety. Unplug the sensor's electrical connector and use an appropriate wrench to remove the sensor. Install the new sensor, ensuring it is properly torqued to the manufacturer's specifications. Reconnect the electrical connector and battery terminal. Clear any error codes using an OBD-II scanner.
Q4 What should I do if my emissions sensor triggers a check engine light?
What should I do if my emissions sensor triggers a check engine light?
If the check engine light is triggered, use an OBD-II scanner to retrieve the error code. Common codes for emissions sensors include P0135 (oxygen sensor heater circuit) or P0420 (catalytic converter efficiency). Inspect the sensor and wiring for damage or loose connections. Clean or replace the sensor if necessary. If the issue persists, consult a professional mechanic for further diagnosis.
Q5 How can I optimize the performance of my emissions sensors?
How can I optimize the performance of my emissions sensors?
To optimize emissions sensor performance, ensure your engine is running efficiently by maintaining proper air-fuel ratios and using high-quality fuel. Regularly replace spark plugs and air filters. Avoid using fuel additives that may contaminate the sensors. Keep the exhaust system in good condition to prevent false readings. Periodically check and clear error codes to maintain accurate sensor functionality.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
2007-2011 Subaru Impreza Service Manual
Coming SoonComprehensive service manual covering all systems, including emissions sensors, for the 2007-2011 Subaru Impreza.
Technical Service Bulletin: Emissions Sensor Updates
Coming SoonLatest updates and fixes for emissions sensors in 2007-2011 Subaru Impreza models.
Subaru Impreza Parts and Accessories Catalog
Coming SoonDetailed catalog of OEM parts and accessories, including emissions sensors, for the 2007-2011 Subaru Impreza.
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