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OE Quality
60-Day Returns
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DensoPart #: 234-4991
Denso 234-4991 Oxygen Sensor - Downstream
⚙️ 17 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$117.46Free 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
📦Oxygen Sensor - OE Style, Downstream
🚗Fitment: Audi, A6 Quattro, A7 Quattro, A7 Sportback, A8 Quattro, and Q7
🔄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 234-4991 Oxygen Sensor - Downstream
| Brand | Denso |
| Part Number | 234-4991 |
| Position | Oxygen Sensor - OE Style, Downstream |
| Wiring Harness Length | 11.30 |
| Sensor Type | Heated |
| Universal Or Specific Fit | Specific |
| Wire Quantity | 4 |
| Connector Gender | Male |
| Thread Diameter | 0.708 |
| Mounting Type | Threaded |
This part fits 17 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2022 | Audi | Q7 | Downstream | O.E. Quality Direct Fit Replacement Sensor; Oxygen Sensor - OE Style |
| 2021 | Audi | Q7 | Downstream | O.E. Quality Direct Fit Replacement Sensor; Oxygen Sensor - OE Style |
| 2020 | Audi | Q7 | Downstream | O.E. Quality Direct Fit Replacement Sensor; Oxygen Sensor - OE Style |
| 2019 | Audi | A7 Sportback | Downstream | OE Style |
| 2019 | Audi | Q7 | Downstream | OE Style |
| 2018 | Audi | A6 Quattro | Downstream | OE Style |
| 2018 | Audi | A7 Quattro | Downstream | OE Style |
| 2018 | Audi | A8 Quattro | Downstream | Cylinder 4, 5, 6; OE Style |
| 2018 | Audi | Q7 | Downstream | OE Style |
| 2017 | Audi | A6 Quattro | Downstream | OE Style |
| 2017 | Audi | A7 Quattro | Downstream | OE Style |
| 2017 | Audi | A8 Quattro | Downstream | Cylinder 4,5,6; OE Style |
| 2017 | Audi | Q7 | Downstream | OE Style |
| 2016 | Audi | A6 Quattro | Downstream | OE Style |
| 2016 | Audi | A7 Quattro | Downstream | OE Style |
| 2016 | Audi | A8 Quattro | Downstream | Cylinder 4,5,6; OE Style |
| 2015 | Audi | A8 Quattro | Downstream | Cylinder 4,5,6; 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:
25244
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.