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Walker 350-341118 Oxygen Sensor - Downstream or UpstreamOE Quality 60-Day Returns
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Part #: 350-341118

Walker 350-341118 Oxygen Sensor - Downstream or Upstream

OE Replacement, Downstream and Upstream
⚙️ 21 vehicles fit this part
🔍
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$86.97Free 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 and Upstream
🚗Fitment: Mazda, 2, CX-3, MX-5, and MX-5 Miata
🔄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 350-341118 Oxygen Sensor - Downstream or Upstream
BrandWalker
Part Number350-341118
PositionOE Replacement, Downstream and Upstream
HeatedYes
Wiring Harness Length425
Wire Gauge Measurement20.00
Sensor TypeNarrow-band
Terminal TypeSpade
Universal Or Specific FitSpecific
Wire Quantity4
Grade TypeStandard replacement
Connector ShapeSquare
Terminal Quantity4
Connector GenderMale
Terminal GenderMale
Wrench Size22
Thread SizeM18 - 1.5
Overall Length458
Mounting TypeThreaded

This part fits 21 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
2025MazdaMX-5 Miata2.0LL4DownstreamOE Replacement
2024MazdaMX-5 Miata2.0LL4DownstreamOE Replacement
2023Mazda21.5LL4N/AOE Replacement
2023MazdaCX-32.0LL4N/AOE Replacement
2023MazdaMX-52.0LL4N/AOE Replacement
2023MazdaMX-5 Miata2.0LL4DownstreamOE Replacement
2022Mazda21.5LL4DownstreamOE Replacement
2022MazdaCX-32.0LL4UpstreamOE Replacement
2022MazdaMX-52.0LL4DownstreamOE Replacement
2022MazdaMX-5 Miata2.0LL4DownstreamOE Replacement
2021Mazda21.5LL4DownstreamOE Replacement
2021MazdaCX-32.0LL4GASDownstreamB1S2; OE Replacement
2021MazdaMX-52.0LL4DownstreamOE Replacement
2021MazdaMX-5 Miata2.0LL4GASDownstreamB1S2; OE Replacement
2020Mazda21.5LL4DownstreamOE Replacement
2020MazdaCX-32.0LL4GASDownstreamB1S2; OE Replacement
2020MazdaMX-52.0LL4DownstreamOE Replacement
2020MazdaMX-5 Miata2.0LL4GASDownstreamB1S2; OE Replacement
2019MazdaCX-32.0LL4GASDownstreamB1S2; OE Replacement
2019MazdaMX-52.0LL4DownstreamOE Replacement
2019MazdaMX-5 Miata2.0LL4GASDownstreamB1S2; OE Replacement

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

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