Oxygen Sensor for Subaru Outback, Legacy, Impreza 2.5L Upstream and Downstream Lambda

Keep your Subaru running at its best with this Oxygen Sensor designed for the Outback, Legacy, and Impreza 2.5L models. This upstream/downstream lambda sensor helps regulate the air-fuel mixture, reduce emissions, and protect your engine’s performance. With compatible part numbers spanning several OEM references, it’s a reliable replacement that fits several 2004–2008 Subaru configurations, ensuring your check-engine light stays off and your fuel economy stays stable.

Built as a heated magnetic induction sensor, this unit is engineered to quickly reach operating temperature for accurate oxygen readings. By providing precise data to the engine control unit, it helps optimize combustion, improves throttle response, and minimizes fuel waste. If you’re troubleshooting idle fluctuations, rough running, or increased exhaust emissions, replacing a worn sensor with a trusted part like this can restore smooth performance and long-term reliability.

Benefits & Tips

• Optimize fuel efficiency and reduce emissions by ensuring the engine sees accurate exhaust readings across all driving conditions.
• Install as a direct replacement for upstream or downstream O2 sensor duties on 2.5L Subaru engines, helping maintain proper catalytic converter function.
• Best practice: verify fitment using the listed OEM numbers and cross references. If you’re unsure, provide your VIN, year, make, and model so we can confirm compatibility before purchase.

Product specifications

• OEM Numbers: 234-9120, 234-4446, 22690-AA500, 22690-AA501, 22690-AA53B, 22690-AA69A
• Part Numbers / Cross References: 234-9120; 234-4446; 22690-AA900; 22641-AA211; 22641AA211; 22641AA32A; 22641AA490; 32010411; 24642; 250-24440; ES20219; KN4-310; SG1083; SG2024; 15025; 22690-AA500; 22690-AA501; 22690-AA53B; 22690-AA69A; 2344446; 2132951
• Origin: Mainland China
• Sensor Type: Magnetic Induction
• Heating Type: Heated
• Measuring Range (compatibility): 22690-AA500, 22690-AA501, 22690-AA53B, 22690-AA69A, 234-4446, 2132951
• Application: For Subaru Impreza 2.5L (2458cc) H4 DOHC Turbo 2004–2008; Subaru Legacy 2.5L (2458cc) H4 DOHC Turbo 2005–2007; Subaru Outback 2.5L (2458cc) H4 DOHC Turbo 2005–2007
• Warranty: 1 year (Replacement Warranty)

Package includes:

• 2pcs

Warnings/Reminders

• Please check the part number before purchasing replacements.
• Please make sure that you are ordering the correct auto part for your vehicle. If you’re not sure or don’t know, contact us with your VIN, year, make, and model and we will double-check fitment for you.
• This sensor has been prepared as a direct replacement for Subaru 2.5L models—ensure correct orientation and torque during installation to avoid O-ring leaks or sensor damage.

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