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Upstream Air Fuel Ratio Sensor (5-Wire) for Subaru Forester & WRX | 234-5178 22641AA650
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Upstream Air Fuel Ratio Sensor (5-Wire)

for Subaru Forester & WRX
🏷️ Replaces OE: 234-5178 22641AA650
In stock
$70.95
Final: $67.40 -5% OFF
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⚙️ Sensor Installation Blueprint
ENGINE CATALYTIC CONVERTER UPSTREAM (SENSOR 1)Exhaust Manifold (Engine Side) DOWNSTREAM (SENSOR 2)Exhaust Pipe (After Converter)
👨‍🔧 Mechanic's Installation Notes:
Location: Screws directly into the Exhaust Manifold (the cast iron pipes attached to the engine block), BEFORE the catalytic converter.
Tools Needed: 7/8" (22mm) O2 Sensor Socket & Penetrating Oil.
Error Codes: P0131, P0134, P0171, P0172

Automotive-Leader Sensors

Vehicle Compatible

Year
Make
Model
Engine/Displacement
2014-2017
Subaru
Forester
2.0L H4
2015-2017
Subaru
WRX
2.0L H4

 

Product Specifications

Warranty & Support: 2-Year Warranty (Pre-sale Load Test + 24/7 Technical Support)
Item
Specification
Core Part Number
234-5178
Interchange: 2345178, 234 5178, 22641-AA650, 22641AA650, 22641 AA650
Position
Upstream, Pre-Catalytic Converter
Key Parameters
- Type: Heated Wideband Air-Fuel Ratio Sensor (5-Wire)
- Wire Harness Length: 282 mm (11.10 in)
- Connector Gender: Female
- Thread Size: M18×1.5 (0.708 in / 17.98mm)
Key Features
Improves fuel efficiency, stable performance, durable.

 

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