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WalkerPart #: 350-35138
Walker 350-35138 Oxygen Sensor - Upstream or Upstream Right
⚙️ 11 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$104.55Free 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
📦OE Replacement, Upstream and Upstream Right
🚗Fitment: Ford and Mazda, 6, CX-9, Mustang, and Tribute
🔄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
Walker 350-35138 Oxygen Sensor - Upstream or Upstream Right
| Brand | Walker |
| Part Number | 350-35138 |
| Position | OE Replacement, Upstream and Upstream Right |
| Heated | Yes |
| Wire Gauge Measurement | 20.00 |
| Sensor Type | Wide-band |
| Terminal Type | Spade |
| Universal Or Specific Fit | Specific |
| Wire Quantity | 5 |
| Grade Type | Standard replacement |
| Connector Shape | Oblong |
| Terminal Gender | Male |
| Wrench Size | 22 |
| Thread Size | M18 - 1.5 |
| Overall Length | 328 |
| Mounting Type | Threaded |
This part fits 11 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2015 | Mazda | CX-9 | 3.7L | V6 | Upstream | Air-Fuel Ratio Sensor; OE Replacement |
| 2014 | Mazda | CX-9 | 3.7L | V6 | Upstream | Air-Fuel Ratio Sensor; OE Replacement |
| 2013 | Mazda | 6 | 3.7L | V6 | Upstream | Air-Fuel Ratio Sensor; OE Replacement |
| 2013 | Mazda | CX-9 | 3.7L | V6 | Upstream | Air-Fuel Ratio Sensor; OE Replacement |
| 2012 | Mazda | 6 | 3.7L | V6 | Upstream | Air-Fuel Ratio Sensor; OE Replacement |
| 2012 | Mazda | CX-9 | 3.7L | V6 | Upstream | Air-Fuel Ratio Sensor; OE Replacement |
| 2011 | Ford | Mustang | 3.7L | V6 | Upstream Right | To 02/03/2011; OE Replacement |
| 2011 | Mazda | 6 | 3.7L | V6 | Upstream | Air-Fuel Ratio Sensor; OE Replacement |
| 2011 | Mazda | CX-9 | 3.7L | V6 | Upstream | Air-Fuel Ratio Sensor; OE Replacement |
| 2011 | Mazda | Tribute | 3.0L | V6 | Upstream | OE Replacement |
| 2010 | Mazda | Tribute | 3.0L | V6 | Upstream | OE Replacement |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.