OE Quality
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DensoPart #: 234-4973

Denso 234-4973 Oxygen Sensor - Downstream or Downstream Right
⚙️ 19 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$173.23Free 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 Right and Downstream
🚗Fitment: BMW, i8, M2, M3, and M4
🔄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 234-4973 Oxygen Sensor - Downstream or Downstream Right
| Brand | Denso |
| Part Number | 234-4973 |
| Position | Oxygen Sensor - OE Style, Downstream Right and Downstream |
| Wiring Harness Length | 26.54 |
| Sensor Type | Heated |
| Universal Or Specific Fit | Specific |
| Wire Quantity | 4 |
| Connector Gender | Male |
| Thread Diameter | 0.708 |
| Mounting Type | Threaded |
This part fits 19 vehicles. Search below:
| Year | Make | Model | Submodel | Position | Notes |
|---|---|---|---|---|---|
| 2021 | BMW | M2 | Downstream Right | O.E. Quality Direct Fit Replacement Sensor; Oxygen Sensor - OE Style | |
| 2020 | BMW | i8 | Base | Downstream | OE Style |
| 2020 | BMW | M2 | Downstream Right | OE Style | |
| 2020 | BMW | M4 | Downstream Right | OE Style | |
| 2019 | BMW | i8 | Base | Downstream | OE Style |
| 2019 | BMW | M2 | Downstream Right | OE Style | |
| 2019 | BMW | M4 | Downstream Right | OE Style | |
| 2018 | BMW | M3 | Downstream Right | OE Style | |
| 2018 | BMW | M4 | Downstream Right | OE Style | |
| 2017 | BMW | i8 | Downstream | OE Style | |
| 2017 | BMW | M3 | Downstream Right | OE Style | |
| 2017 | BMW | M4 | Downstream Right | OE Style | |
| 2016 | BMW | i8 | Downstream | OE Style | |
| 2016 | BMW | M3 | Downstream Right | OE Style | |
| 2016 | BMW | M4 | Downstream Right | OE Style | |
| 2015 | BMW | i8 | Downstream | OE Style | |
| 2015 | BMW | M3 | Downstream Right | OE Style | |
| 2015 | BMW | M4 | Downstream Right | OE Style | |
| 2014 | BMW | i8 | 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:
1178784848711788617030
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.