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Walker 350-34133 Oxygen Sensor - DownstreamOE Quality 60-Day Returns
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Part #: 350-34133

Walker 350-34133 Oxygen Sensor - Downstream

OE Replacement, Downstream
⚙️ 23 vehicles fit this part
🔍
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$100.65Free 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: Mazda, 3, 6, CX-30, CX-5, and CX-9
🔄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 350-34133 Oxygen Sensor - Downstream
BrandWalker
Part Number350-34133
PositionOE Replacement, Downstream
HeatedYes
Wiring Harness Length765
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 Length773
Mounting TypeThreaded

This part fits 23 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
2025MazdaCX-52.5LL4DownstreamOE Replacement
2024MazdaCX-52.5LL4DownstreamOE Replacement
2023MazdaCX-52.5LL4DownstreamOE Replacement
2022Mazda32.5LL4DownstreamOE Replacement
2022MazdaCX-302.5LL4DownstreamOE Replacement
2022MazdaCX-52.5LL4DownstreamOE Replacement
2021Mazda32.5LL4DownstreamOE Replacement
2021Mazda62.5LL4GASDownstreamB1S2; OE Replacement
2021MazdaCX-302.5LL4DownstreamOE Replacement
2021MazdaCX-52.5LL4DownstreamB1S2; OE Replacement
2020Mazda32.5LL4DownstreamOE Replacement
2020Mazda62.5LL4GASDownstreamB1S2; OE Replacement
2020MazdaCX-302.5LL4GASDownstreamB1S2; OE Replacement
2020MazdaCX-52.5LL4GASDownstreamB1S2; OE Replacement
2019Mazda32.5LL4DownstreamOE Replacement
2019Mazda62.5LL4GASDownstreamB1S2; OE Replacement
2019MazdaCX-52.5LL4GASDownstreamB1S2; OE Replacement
2018Mazda62.5LL4GASDownstreamB1S2; OE Replacement
2018MazdaCX-52.5LL4GASDownstreamB1S2; OE Replacement
2018MazdaCX-92.5LL4DownstreamOE Replacement
2017MazdaCX-52.5LL4DownstreamOE Replacement
2017MazdaCX-92.5LL4DownstreamOE Replacement
2016MazdaCX-92.5LL4DownstreamOE Replacement

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

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