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OE Quality
60-Day Returns
DensoPart #: 234-5733
Denso 234-5733 Air / Fuel Ratio Sensor - Upstream
18 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$189.19Free 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
Air / Fuel Ratio Sensor - OE Style, Upstream
Fitment: Mazda, 6, 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
Not what you need? See all Air / Fuel Ratio Sensor options
Denso 234-5733 Air / Fuel Ratio Sensor - Upstream
| Brand | Denso |
|---|---|
| Part Number | 234-5733 |
| Position | Air / Fuel Ratio Sensor - OE Style, Upstream |
| Wiring Harness Length | 10.63 |
| Sensor Type | Wide-band |
| Universal Or Specific Fit | Specific |
| Wire Quantity | 5 |
| Grade Type | Standard replacement |
This part fits 18 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2024 | Mazda | CX-5 | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style |
| 2023 | Mazda | CX-5 | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style |
| 2023 | Mazda | CX-9 | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style |
| 2022 | Mazda | CX-5 | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style |
| 2022 | Mazda | CX-9 | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style |
| 2021 | Mazda | 6 | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style |
| 2021 | Mazda | CX-5 | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style |
| 2021 | Mazda | CX-9 | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style |
| 2020 | Mazda | 6 | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style |
| 2020 | Mazda | CX-5 | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style |
| 2020 | Mazda | CX-9 | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style |
| 2019 | Mazda | 6 | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style |
| 2019 | Mazda | CX-5 | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style |
| 2019 | Mazda | CX-9 | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style |
| 2018 | Mazda | 6 | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style |
| 2018 | Mazda | CX-9 | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style |
| 2017 | Mazda | CX-9 | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style |
| 2016 | Mazda | CX-9 | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - 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:
234573327069PY8V188G1
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.