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Walker 350-341127 Oxygen Sensor - DownstreamOE Quality 60-Day Returns
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Part #: 350-341127

Walker 350-341127 Oxygen Sensor - Downstream

OE Replacement, Downstream
⚙️ 24 vehicles fit this part
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Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$76.82Free Shipping
🚚Free ShippingNo Cost to Continental U.S.
🔄Free Returns*Wrong fit? No cost
🛡️60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
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✅ In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
✅OE Direct Replacement — Bolt-on fit, no modifications needed
📦OE Replacement, Downstream
🚗Fitment: Scion, Subaru, and Toyota, 86, BRZ, FR-S, WRX, and WRX STI
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST
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Walker 350-341127 Oxygen Sensor - Downstream
BrandWalker
Part Number350-341127
PositionOE Replacement, Downstream
HeatedYes
Wire Gauge Measurement20.00
Sensor TypeNarrow-band
Terminal TypeSpade
Universal Or Specific FitSpecific
Wire Quantity4
Grade TypeStandard replacement
Connector ShapeSquare
Terminal GenderMale
Wrench Size22
Thread SizeM18 - 1.5
Overall Length583
Mounting TypeThreaded

This part fits 24 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
2021SubaruWRX STI2.5LH4DownstreamOE Replacement
2020SubaruBRZ2.0LH4GASDownstreamB1S2; OE Replacement
2020SubaruWRX STI2.5LH4GASDownstreamB1S2; OE Replacement
2020Toyota862.0LH4GASDownstreamB1S2; OE Replacement
2019SubaruBRZ2.0LH4GASDownstreamB1S2; OE Replacement
2019SubaruWRX STI2.5LH4GASDownstreamB1S2; OE Replacement
2019Toyota862.0LH4GASDownstreamB1S2; OE Replacement
2018SubaruBRZ2.0LH4GASDownstreamB1S2; OE Replacement
2018SubaruWRX STI2.5LH4GASDownstreamB1S2; OE Replacement
2018Toyota862.0LH4GASDownstreamB1S2; OE Replacement
2017SubaruBRZ2.0LH4GASDownstreamB1S2; OE Replacement
2017SubaruWRX STI2.5LH4GASDownstreamB1S2; OE Replacement
2017Toyota862.0LH4GASDownstreamB1S2; OE Replacement
2016ScionFR-S2.0LH4DownstreamOE Replacement
2016SubaruBRZ2.0LH4GASDownstreamB1S2; OE Replacement
2016SubaruWRX2.5LH4DownstreamOE Replacement
2016SubaruWRX STI2.5LH4GASDownstreamB1S2; OE Replacement
2015SubaruBRZ2.0LH4GASDownstreamB1S2; OE Replacement
2015SubaruWRX2.5LH4DownstreamOE Replacement
2015SubaruWRX STI2.5LH4GASDownstreamB1S2; OE Replacement
2014SubaruBRZ2.0LH4GASDownstreamB1S2; OE Replacement
2014SubaruWRX STI2.5LH4GASDownstreamB1S2; OE Replacement
2013SubaruBRZ2.0LH4GASDownstreamB1S2; OE Replacement
2013SubaruWRX STI2.5LH4DownstreamOE Replacement

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

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