Details

• Brand:

  

• SKU:

  22641AA42A

• Positions: Front
• Other Names:

  Oxygen Sensor, Sen Ay-A/F Ratio

• Description:

  Sensor Air/Fuel Ratio. Sensor A/F Ratio.

  Fits Legacy, Outback

  Oxygen Sensor
  A failed Oxygen Sensor will often have no noticeable symptoms beyond a check engine light, but it does cause your Subaru to operate inefficiently and produce higher emissions. Our technicians have access to manufacturer-approved repair processes and Subaru genuine parts. Front. 2.5l. Legacy/Outback. 2.5L w/ turbo.

  
  

  Air/Fuel Sensor – Subaru (22641AA42A) is a Genuine OEM wideband oxygen sensor meticulously engineered to monitor and maintain ideal air/fuel ratios in select Subaru engines. This sensor plays a pivotal role in ensuring your vehicle operates at peak efficiency—regulating emissions, throttle response, and fuel economy by continually measuring oxygen levels in the exhaust stream.

  Crafted to Subaru’s uncompromising factory standards, the Air/Fuel Sensor (part number 22641AA42A) incorporates high-sensitivity zirconia sensing elements and a durable stainless-steel housing. The unit’s robust design is rated to resist extreme temperatures, vibration, and exposure to road grime or exhaust contaminants—ensuring long-term stability and accurate performance across thousands of miles.

  Installation is straightforward, even for experienced DIY mechanics. The sensor threads directly into the exhaust manifold or downpipe using factory-spec fittings. It plugs into the OEM wiring harness without splicing or adapter cables, making it a true plug-and-play replacement. After installation, the vehicle’s ECU detects the OEM part immediately—restoring precise fuel trim control without further intervention.

  Choosing this Genuine OEM sensor brings a suite of advantages:

  • Accurate AFR feedback ensures optimal combustion, improving throttle response and drivability

  • Enhanced fuel efficiency through precise control of mixtures across RPM ranges

  • Reduced emissions and smoother idle, complying with factory environmental standards

  • Restored accuracy for diagnostic tools, minimizing false oxygen sensor fault codes

  • Long-term reliability thanks to materials built to last under thermal cycling and exhaust heat

  Compared to aftermarket alternatives, this sensor minimizes risks such as calibration drift, poor fitment, or early failure. It maintains the original calibration Subaru engineers prescribed—helping you preserve your vehicle’s emission compliance and performance dynamics.

  Key features at a glance:

  • OEM part for seamless compatibility

  • High-precision zirconia sensing element

  • Stainless-steel housing for rugged durability

  • Direct-install, no modifications required

  • Supports optimal emissions, fuel economy, and engine response

  For professional mechanics, this sensor delivers dependable diagnostics and simplified installations. For DIY enthusiasts, it offers true plug-and-play convenience and reliable engine control. In both cases, the Subaru Air/Fuel Sensor (22641AA42A) represents a factory-grade component engineered for longevity and performance—empowering you to maintain your vehicle in peak condition with confidence.

  
  

• Condition: New
• Notes: Order By Description.

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