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Walker 250-25172 Oxygen Sensor - UpstreamOE Quality 60-Day Returns
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Part #: 250-25172

Walker 250-25172 Oxygen Sensor - Upstream

OE Base Sensor, Upstream
⚙️ 17 vehicles fit this part
🔍
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$200.90Free 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 Base Sensor, Upstream
🚗Fitment: Mazda, 3, CX-30, CX-50, 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 250-25172 Oxygen Sensor - Upstream
BrandWalker
Part Number250-25172
PositionOE Base Sensor, Upstream
HeatedYes
Wiring Harness Length315.00
Sensor TypeWide-band
Terminal TypeSpade
Universal Or Specific FitSpecific
Wire Quantity5
Grade TypeStandard replacement
Connector ShapeRectangle
Terminal Quantity5
Connector GenderFemale
Terminal GenderMale
Wrench Size22
Thread SizeM18 - 1.5
Overall Length348.00
Mounting TypeThreaded

This part fits 17 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2025Mazda32.5LL4UpstreamOE Base Sensor
2025MazdaCX-302.5LL4UpstreamOE Base Sensor
2025MazdaCX-502.5LL4UpstreamOE Base Sensor
2025MazdaMX-5 Miata2.0LL4UpstreamOE Base Sensor
2024Mazda32.5LL4UpstreamOE Base Sensor
2024MazdaCX-302.5LL4UpstreamOE Base Sensor
2024MazdaCX-502.5LL4UpstreamOE Base Sensor
2024MazdaMX-5 Miata2.0LL4UpstreamOE Base Sensor
2023Mazda32.5LL4UpstreamOE Base Sensor
2023MazdaCX-302.5LL4UpstreamOE Base Sensor
2023MazdaCX-502.5LL4UpstreamOE Base Sensor
2023MazdaMX-5 Miata2.0LL4UpstreamOE Base Sensor
2022Mazda32.5LL4UpstreamOE Base Sensor
2022MazdaCX-302.5LL4UpstreamOE Base Sensor
2022MazdaMX-5 Miata2.0LL4UpstreamOE Base Sensor
2021Mazda32.5LL4UpstreamOE Base Sensor
2021MazdaCX-302.5LL4UpstreamOE Base Sensor

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

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