Air Fuel Ratio O2 Oxygen Sensor For 04-11 Subaru 2.5L Naturally Aspirated
Air Fuel Ratio O2 Oxygen Sensor For 04-11 Subaru 2.5L Naturally Aspirated is an OE-replacement upstream sensor for precise fuel mixture control. Priced at $31.24, it's ideal for maintaining engine efficiency and emissions compliance in naturally aspirated Subaru models.
● In stock
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Key features
- Exact fit for 04–11 Subaru 2.5L NA engines
- Upstream, front, Bank 1 Sensor 1 location
- OE-replacement design for seamless installation
- High-quality materials for reliable performance
- 1-year, unlimited-mileage warranty included
- Replacement brand for trusted aftermarket value
- Maintains fuel efficiency and emissions compliance
Pros
- +Affordable alternative to OEM sensors
- +Direct fit with no modifications needed
- +Improves fuel economy and engine response
- +Backed by a 1-year unlimited-mileage warranty
- +Suitable for DIY and professional use
Cons
- −Only fits naturally aspirated 2.5L models
- −Not designed for turbocharged engines
- −May require basic mechanical tools for install
About Air Fuel Ratio O2 Oxygen Sensor For 04-11 Subaru 2.5L Naturally Aspirated
What is Air Fuel Ratio O2 Oxygen Sensor For 04-11 Subaru 2.5L Naturally Aspirated?
This Air Fuel Ratio O2 Oxygen Sensor is an OE-replacement part designed specifically for 2004–2011 Subaru 2.5L naturally aspirated engines. Positioned upstream, front, Bank 1 Sensor 1, it monitors oxygen levels in exhaust gases to help the engine control unit optimize the air-fuel mixture. Proper function ensures efficient combustion, reduced emissions, and improved fuel economy. Manufactured with high-quality materials, this sensor meets the performance standards required for reliable engine operation and emissions system integrity.
Key features
- Exact Fit — Designed for 04–11 Subaru 2.5L NA engines.
- Sensor Location — Upstream, front, Bank 1 Sensor 1.
- OE Replacement — Matches factory specifications for fit and function.
- High-Quality Components — Built for durability and accurate readings.
- Warranty — Backed by a 1-year, unlimited-mileage warranty.
- Brand — Replacement brand, known for affordable, reliable auto parts.
- Application — Ideal for repair, maintenance, or rebuilds.
Who is Air Fuel Ratio O2 Oxygen Sensor For 04-11 Subaru 2.5L Naturally Aspirated for?
This sensor is designed for Subaru owners and DIY mechanics maintaining 2.5L naturally aspirated models from 2004 to 2011. It suits those replacing a failing or aged oxygen sensor to restore engine performance and pass emissions testing. Professional technicians and home garages alike will appreciate its direct fit and reliable operation without the high cost of dealership parts.
How does Air Fuel Ratio O2 Oxygen Sensor For 04-11 Subaru 2.5L Naturally Aspirated compare?
Compared to standard oxygen sensors, this air fuel ratio sensor offers more precise monitoring for better engine tuning. It's more affordable than OEM dealership sensors while maintaining OE-level performance. Unlike universal-fit sensors, it's vehicle-specific, eliminating guesswork during installation. When stacked against lower-tier aftermarket parts, it provides improved longevity and accuracy, especially under sustained driving conditions.
Best use cases
- →Replacing a failed upstream O2 sensor
- →Restoring check engine light-related repairs
- →Routine maintenance on high-mileage Subarus
- →Improving fuel efficiency and emissions
- →DIY repair for 2004–2011 Subaru owners
Is Air Fuel Ratio O2 Oxygen Sensor For 04-11 Subaru 2.5L Naturally Aspirated right for you?
This sensor is best for Subaru owners with 2.5L naturally aspirated engines from 2004–2011 needing a reliable, cost-effective O2 sensor replacement. Ideal for DIYers with basic mechanical skills or professionals seeking OE-level performance at a lower price. Consider this over universal sensors or pricier OEM parts for balanced value and fit.
How it compares: Compared to generic O2 sensors, this model offers exact fit and better accuracy. It's more affordable than OEM sensors while delivering similar performance, making it a smart upgrade over low-tier aftermarket options for Subaru-specific applications.
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What is an air fuel ratio O2 sensor?
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An air fuel ratio O2 sensor measures oxygen in exhaust gases to help the engine optimize fuel mixture. This improves efficiency, reduces emissions, and ensures smooth performance, especially in Subaru's naturally aspirated 2.5L engines from 2004–2011.
Does this O2 sensor fit turbocharged Subarus?
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No, this sensor is designed specifically for naturally aspirated 2.5L Subaru engines from 2004–2011. It is not compatible with turbocharged models like the WRX or STI, which require different sensor specifications.
How do I know if my O2 sensor is failing?
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Common signs include a check engine light, poor fuel economy, rough idling, and failed emissions tests. If your Subaru shows these issues, especially with Bank 1 Sensor 1 codes, this replacement sensor may resolve the problem.
Is this sensor easy to install?
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Yes, it's a direct fit for Bank 1 Sensor 1 location. Most DIYers with basic tools and mechanical experience can install it in under an hour. No programming or modifications are required for proper function.
Can I use this sensor for Bank 2 or downstream locations?
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No, this sensor is designed specifically for upstream, front, Bank 1 Sensor 1. Using it in other positions may cause incorrect readings or fitment issues. Always match sensor location to your vehicle's requirements.
How much does Air Fuel Ratio O2 Oxygen Sensor For 04-11 Subaru 2.5L Naturally Aspirated cost?
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Air Fuel Ratio O2 Oxygen Sensor For 04-11 Subaru 2.5L Naturally Aspirated is $31.24 at Lab Work Auto. Prices may change — click through to Lab Work Auto for the latest.
Is Air Fuel Ratio O2 Oxygen Sensor For 04-11 Subaru 2.5L Naturally Aspirated in stock at Lab Work Auto?
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Yes, Air Fuel Ratio O2 Oxygen Sensor For 04-11 Subaru 2.5L Naturally Aspirated is currently in stock at Lab Work Auto.
Specifications
- SKU
- F8-019212