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OE Quality
60-Day Returns
DensoPart #: 234-8000
Denso 234-8000 Oxygen Sensor - Downstream
⚙️ 19 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$132.65Free 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.
🔥
✅ 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 Style, Downstream
🚗Fitment: Mazda, Scion, and Toyota, CX-3, iA, MX-5 Miata, Yaris, and Yaris iA
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST
Not what you need? Click here for all Oxygen Sensor options
Denso 234-8000 Oxygen Sensor - Downstream
| Brand | Denso |
| Part Number | 234-8000 |
| Position | OE Style, Downstream |
| Wiring Harness Length | 16.14 |
| Sensor Type | Heated |
| Universal Or Specific Fit | Specific |
| Wire Quantity | 4 |
| Connector Gender | Female |
| Thread Diameter | 0.709 |
| Mounting Type | Threaded |
This part fits 19 vehicles. Search below:
| Year | Make | Model | Submodel | Position | Notes |
|---|---|---|---|---|---|
| 2019 | Toyota | Yaris | Downstream | To 08/2018; OE Style | |
| 2018 | Mazda | CX-3 | Touring | Downstream | OE Style |
| 2018 | Mazda | CX-3 | Sport | Downstream | OE Style |
| 2018 | Mazda | CX-3 | Grand Touring | Downstream | OE Style |
| 2018 | Mazda | CX-3 | GX | Downstream | OE Style |
| 2018 | Mazda | CX-3 | GT | Downstream | OE Style |
| 2018 | Mazda | CX-3 | GS | Downstream | OE Style |
| 2018 | Mazda | MX-5 Miata | Sport | Downstream | OE Style |
| 2018 | Mazda | MX-5 Miata | RF Grand Touring | Downstream | OE Style |
| 2018 | Mazda | MX-5 Miata | RF Club | Downstream | OE Style |
| 2018 | Mazda | MX-5 Miata | Grand Touring | Downstream | OE Style |
| 2018 | Mazda | MX-5 Miata | Club | Downstream | OE Style |
| 2018 | Toyota | Yaris iA | Downstream | OE Style | |
| 2017 | Mazda | CX-3 | Downstream | OE Style | |
| 2017 | Mazda | MX-5 Miata | Downstream | OE Style | |
| 2017 | Toyota | Yaris iA | Downstream | OE Style | |
| 2016 | Mazda | CX-3 | Downstream | OE Style | |
| 2016 | Mazda | MX-5 Miata | Downstream | OE Style | |
| 2016 | Scion | iA | Downstream | OE Style |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
P51C18861P51S1886ZA
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.