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OE Quality
60-Day Returns
DensoPart #: 234-5745
Denso 234-5745 Air / Fuel Ratio Sensor - Upstream
⚙️ 28 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$173.61Free 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, 535i xDrive, 640i, 640i Gran Coupe, 740i, 740Li, 740Li xDrive, ActiveHybrid 7, X3, and X4
🔄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 234-5745 Air / Fuel Ratio Sensor - Upstream
| Brand | Denso |
| Part Number | 234-5745 |
| Position | Air / Fuel Ratio Sensor - OE Style, Upstream |
| Wiring Harness Length | 28.86 |
| Sensor Type | Wide-band |
| Universal Or Specific Fit | Specific |
| Wire Quantity | 5 |
| Grade Type | Standard replacement |
| Connector Gender | Male |
This part fits 28 vehicles. Search below:
| Year | Make | Model | Submodel | Position | Notes |
|---|---|---|---|---|---|
| 2017 | BMW | X3 | xDrive35i | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style |
| 2016 | BMW | X3 | xDrive35i | 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 | |
| 2015 | BMW | 740i | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | |
| 2015 | BMW | 740Li | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | |
| 2015 | BMW | 740Li xDrive | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | |
| 2015 | BMW | ActiveHybrid 7 | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | |
| 2015 | BMW | X3 | 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 | |
| 2014 | BMW | 640i Gran Coupe | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | |
| 2014 | BMW | 740i | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | |
| 2014 | BMW | 740Li | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | |
| 2014 | BMW | 740Li xDrive | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | |
| 2014 | BMW | ActiveHybrid 7 | 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 | |
| 2013 | BMW | 535i xDrive | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | |
| 2013 | BMW | 640i | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | |
| 2013 | BMW | 640i Gran Coupe | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | |
| 2013 | BMW | 740i | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | |
| 2013 | BMW | 740Li | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | |
| 2013 | BMW | 740Li xDrive | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | |
| 2013 | BMW | ActiveHybrid 7 | 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 | |
| 2012 | BMW | 535i xDrive | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | |
| 2012 | BMW | 640i | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | |
| 2012 | BMW | X3 | xDrive35i | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style |
| 2011 | BMW | 535i xDrive | Upstream | O.E. Quality Direct Fit Replacement Sensor; Air / Fuel Ratio Sensor - OE Style | |
| 2011 | BMW | X3 | xDrive35i | 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:
11787589476170002345745250-2510627053350-35091
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.