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OE Quality
60-Day Returns
DensoPart #: 234-5743
Denso 234-5743 Air / Fuel Ratio Sensor - Upstream
⚙️ 71 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$153.97Free 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.
🔥
✅ 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: BMW, 228i, 228i xDrive, 320i, 320i xDrive, 328i, 328i GT xDrive, 328i xDrive, 428i, 428i Gran Coupe, 428i xDrive, 428i xDrive Gran Coupe, 528i, 528i xDrive, X1, X3, X4, X5, and Z4
🔄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 Air / Fuel Ratio Sensor options
Denso 234-5743 Air / Fuel Ratio Sensor - Upstream
| Brand | Denso |
| Part Number | 234-5743 |
| Position | Air / Fuel Ratio Sensor - OE Style, Upstream |
| Wiring Harness Length | 15.24 |
| Sensor Type | Wide-band |
| Universal Or Specific Fit | Specific |
| Wire Quantity | 5 |
| Grade Type | Standard replacement |
| Connector Gender | Male |
This part fits 71 vehicles. Search below:
| Year | Make | Model | Submodel | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|
| 2018 | BMW | 320i | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2018 | BMW | 320i xDrive | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2018 | BMW | X4 | xDrive28i | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | |
| 2018 | BMW | X5 | xDrive40e | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | |
| 2017 | BMW | 320i | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2017 | BMW | 320i xDrive | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2017 | BMW | X3 | GAS | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | |
| 2017 | BMW | X4 | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2017 | BMW | X5 | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2016 | BMW | 228i | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2016 | BMW | 228i xDrive | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2016 | BMW | 320i | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2016 | BMW | 320i xDrive | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2016 | BMW | 328i | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2016 | BMW | 328i GT xDrive | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2016 | BMW | 328i xDrive | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2016 | BMW | 428i | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2016 | BMW | 428i Gran Coupe | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2016 | BMW | 428i xDrive | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2016 | BMW | 428i xDrive Gran Coupe | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2016 | BMW | 528i | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2016 | BMW | 528i xDrive | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2016 | BMW | X3 | GAS | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | |
| 2016 | BMW | X4 | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2016 | BMW | X5 | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2016 | BMW | Z4 | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2015 | BMW | 228i | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2015 | BMW | 228i xDrive | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2015 | BMW | 320i | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2015 | BMW | 320i xDrive | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2015 | BMW | 328i | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2015 | BMW | 328i GT xDrive | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2015 | BMW | 328i xDrive | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2015 | BMW | 428i | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2015 | BMW | 428i Gran Coupe | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2015 | BMW | 428i xDrive | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2015 | BMW | 428i xDrive Gran Coupe | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2015 | BMW | 528i | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2015 | BMW | 528i xDrive | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2015 | BMW | X1 | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2015 | BMW | X3 | GAS | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | |
| 2015 | BMW | X4 | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2015 | BMW | Z4 | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2014 | BMW | 228i | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2014 | BMW | 320i | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2014 | BMW | 320i xDrive | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2014 | BMW | 328i | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2014 | BMW | 328i GT xDrive | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2014 | BMW | 328i xDrive | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2014 | BMW | 428i | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2014 | BMW | 428i xDrive | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2014 | BMW | 528i | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2014 | BMW | 528i xDrive | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2014 | BMW | X1 | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2014 | BMW | X3 | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2014 | BMW | Z4 | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2013 | BMW | 320i | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2013 | BMW | 320i xDrive | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2013 | BMW | 328i | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2013 | BMW | 328i xDrive | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2013 | BMW | 528i | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2013 | BMW | 528i xDrive | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2013 | BMW | X1 | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2013 | BMW | X3 | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2013 | BMW | Z4 | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2012 | BMW | 320i | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2012 | BMW | 328i | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2012 | BMW | 528i | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2012 | BMW | 528i xDrive | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2012 | BMW | X1 | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | ||
| 2012 | BMW | Z4 | 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:
1178758912117272234574324364250-25089350-35079
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.