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Important: Verify connector shape and pins match your original part.
2-Piece Air Fuel Ratio & O2 Sensor
Fits Subaru Impreza Outback (06-11)
Replaces OE: 234-9123, 234-4445
Resolves Symptoms
- Check Engine Light (P0420/P0171)
- Rough Idle & Hesitation
- Poor Fuel Economy (MPG)
- Failed Emissions Inspection
Estimated Delivery
Free
Ordered
Oct 30
Prepared
Oct 30-Oct 31
Delivered
Nov 13-Nov 21
Requires overseas shipment. Upgrade to expedited shipping at checkout if urgent.
2-Year Warranty
🛡️ Quality Coverage: Protects against any manufacturing defects for 2 full years.
🔄 Free Replacement: Brand-new replacement for free if quality issues occur.
30-Day Return & Refund
📦 Free Returns: Zero costs to you if the product has quality issues.
💰 Full Refunds: 100% money-back guarantee within 30 days for defective items.
5-Step Fitment Guide
- Check OE: Find original part no. & plug.
- Compare Photos: Match plug with our images.
- Verify YMM: Confirm via fitment tool.
- Review Specs: Check pins & dimensions.
- Purchase: Buy confidently once matched!
Review Rewards
Share an install photo & review to unlock:
- Under $50 Orders: 3% Off Next Order
- $50+ Orders: 5% Direct Cashback
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$34.95
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No hidden fees: What you see is what you pay.
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Restore performance: Fix issues and drive with confidence.
Check Engine Light? Find Your Symptoms
🌬️ O2 & A/F Sensors
- P0134No Activity Detected
- P0135Heater Circuit Malfunction
- P0137/38Circuit Low/High Voltage
- P2195Signal Stuck Lean
- P0030/31Heater Control Circuit
⛽ Fuel & Air Mixture
- P0171/74System Too Lean
- P0172System Too Rich
- P2096Post-Catalyst Trim Too Lean
- P0087Fuel Rail Pressure Low
- P0201-04Injector Circuit Open
♻️ Catalytic Converters
- P0420Efficiency Below Threshold (B1)
- P0430Efficiency Below Threshold (B2)
⚡ Ignition / Misfires
- P0300Random Misfire
- P0301-06Cylinder-Specific Misfire
Automotive-Leader Sensors
Vehicle Compatible
|
Year
|
Make
|
Model
|
Engine/Displacement
|
Note
|
|---|---|---|---|---|
|
2006-2009
|
Subaru
|
Outback 2.5i Wagon 4-Door
|
2.5L H4
|
2458CC, GAS, SOHC, Naturally Aspirated
|
|
2006-2009
|
Subaru
|
Legacy 2.5i Sedan 4-Door
|
2.5L H4
|
2458CC, GAS, SOHC, Naturally Aspirated
|
|
2007-2009
|
Subaru
|
Legacy 2.5i Limited Sedan 4-Door
|
2.5L H4
|
2458CC, GAS, SOHC, Naturally Aspirated
|
|
2006-2010
|
Subaru
|
Forester X Wagon 4-Door
|
2.5L H4
|
2458CC, GAS, SOHC, Naturally Aspirated
|
|
2009-2010
|
Subaru
|
Forester X Limited Wagon 4-Door
|
2.5L H4
|
2458CC, GAS, SOHC, Naturally Aspirated
|
|
2006-2011
|
Subaru
|
Impreza Outback Sport Wagon 4-Door
|
2.5L H4
|
2458CC, GAS, SOHC, Naturally Aspirated
|
|
2006-2011
|
Subaru
|
Impreza 2.5i Sedan 4-Door
|
2.5L H4
|
2458CC, GAS, SOHC, Naturally Aspirated
|
|
2006
|
Saab
|
9-2X 2.5i Wagon 4-Door
|
2.5L H4
|
2458CC, GAS, SOHC, Naturally Aspirated
|
Product Specifications
Warranty & Support: 2 Years + Pre-sale Load Test + 24/7 Technical Support
|
Item
|
Specification
|
|---|---|
|
Core Part Number (Upstream)
|
234-9123
Interchange: 22641-AA36A, 22641-AA360, 22641-AA180, 22641-AA370, 753718, 15171, 24696, 32010412 |
|
Position (Upstream)
|
Exhaust System, Upstream Sensor 1 (Front, Pre-Catalytic Converter)
|
|
Key Parameters (Upstream)
|
- Sensor Type: Heated
- Wires: 4-Wire - Wire Harness Length: 19.69 in - Performance: Improves fuel efficiency with stable and durable operation |
|
Item
|
Specification
|
|---|---|
|
Core Part Number (Downstream)
|
234-4445
Interchange: 22690-AA81A, 22690-AA810, 22690-AA93A, 32010413, 15170, 24642, OS5331, 213-2951 |
|
Position (Downstream)
|
Exhaust System, Downstream Sensor 2 (Rear, Post-Catalytic Converter)
|
|
Key Parameters (Downstream)
|
- Sensor Type: Heated
- Wires: 4-Wire - Connector: Male - Mounting: Threaded (M18 x 1.5) - Thread Diameter: 0.708 in - Wire Harness Length: 20.87 in |