Walker 350-341021 Oxygen Sensor - Downstream Rear
OE Quality 60-Day Returns
Walker
 Walker Products Aftermarket

Walker 350-341021 Oxygen Sensor - Downstream Rear

Brand Walker 350-341021
Position Downstream Rear
Product line Walker Products Aftermarket
Fits Nissan · 4 vehicles

OE replacement. Engineered as an original-equipment-style sensor for accurate ECU feedback.

Walker Products since 1946. A long-running name in engine management and fuel system components.

$114.51Free shipping
In stock · usually ships same day before 1pm CST
Step 1 — Confirm fitment
Free return shipping if it doesn't fit when you check fitment here first.

Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
Step 2 — Quantity
Order total $114.51
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.
Not what you need? See all Oxygen Sensor options

Walker Oxygen Sensor for Nissan Quest

Walker Products 350-341021 is an OE-style oxygen sensor engineered for specific downstream rear applications. It is built to deliver the diagnostic feedback the ECU expects, helping maintain proper fuel control and emissions performance on the Nissan Quest.

  • Direct-fit oxygen sensor for the downstream rear position
  • Engineered for ECU feedback on the specified application
  • OE replacement design for Nissan Quest fitment
  • Walker Products Aftermarket part number 350-341021
  • Built for 2015-2017 Nissan Quest, downstream rear

Walker Products Aftermarket Details

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors developed as OE replacement parts for worldwide vehicle applications. Part number 350-341021 is matched to the correct fitment position and is intended to provide the sensor input needed by the vehicle’s control system. For Nissan Quest models, this downstream rear oxygen sensor is listed for 2015 and 2016-2017 applications, including the 2015 Quest from 08/2014 and the 2016-2017 Quest rear downstream position.

Common Issues This Sensor May Address

  • Check engine light or malfunction indicator light related to oxygen sensor performance
  • Poor engine operation caused by inaccurate exhaust feedback
  • Increased fuel consumption from incorrect air-fuel control
  • Higher exhaust emissions from a failing downstream sensor
  • Stored ECU fault codes tied to the affected sensor circuit

Installation Notes

Verify the sensor location before installation and confirm the downstream rear position on the vehicle. Inspect the sensor, wiring harness, and connector for physical damage, since damaged wiring can shorten service life and affect readings. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Quality Assurance

Walker Products is an Automotive ISO9001/TS 16949 certified company with a long history in engine management components dating back to 1946. The 350-341021 oxygen sensor is manufactured for the specified application and fitment position to support the diagnostic feedback required by the ECU.

Related reading

This part fits 4 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersFuel TypePositionNotes
2017NissanQuest3.5LV6GASDownstream RearRear downstream oxygen sensor must be installed in correct position.; Walker Products Aftermarket
2016NissanQuest3.5LV6GASDownstream RearRear downstream oxygen sensor must be installed in correct position.; Walker Products Aftermarket
2015NissanQuest3.5LV6GASDownstream RearDe 08/2014; Downstream; Rear; From 08/2014; Walker Products Aftermarket
2015NissanQuest3.5LV6GASDownstream RearDownstream; Rear; From 08/2014; Walker Products Aftermarket