Walker 350-35144 Oxygen Sensor - Upstream, Upstream Rear or Upstream Right
OE Quality 60-Day Returns
Walker
 OE Replacement

Walker 350-35144 Oxygen Sensor - Upstream, Upstream Rear or Upstream Right

Brand Walker 350-35144
Position Upstream Rear, 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 458
Mounting Type Threaded
Product line OE Replacement
Fits Ford, Land Rover, Lincoln, Mazda, and Mercury · 81 vehicles

OE replacement. Engineered as a standard replacement for specific applications.

Wide-band sensor. Provides the diagnostic feedback the ECU requires.

Heated design. Helps the sensor reach operating temperature quickly.

$78.67Free 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 $78.67
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

OE Replacement Oxygen Sensor for Select Ford and Land Rover

Walker OE Replacement oxygen sensor 350-35144 is a specific-fit, heated wide-band sensor built for the exact application and position listed below. It is engineered to deliver the diagnostic feedback the ECU expects on vehicles such as the Ford F-150, Ford Explorer, and Land Rover Range Rover.

Key Features

  • Heated wide-band oxygen sensor for precise exhaust feedback
  • Specific-fit design for the listed upstream and upstream rear positions
  • 5-wire configuration with oblong connector and male spade terminals
  • Threaded mounting with M18 x 1.5 thread size
  • Standard replacement grade for OE-style service
  • 22 mm wrench size and 458 mm overall length

Walker OE Replacement Line

Walker Products’ OE Replacement line is built around application-specific sensor fitment, so the sensor, connector, and harness layout match the vehicle position called out in the catalog. Part 350-35144 is intended for vehicles that rely on accurate air-fuel and oxygen sensor input for fuel control, emissions monitoring, and fault-code detection.

This part cross-references no listed aftermarket part numbers for the same application.

Vehicle Fitment

  • Fits 2016-2021 Land Rover Range Rover, upstream
  • Fits 2021 Land Rover Range Rover Sport, upstream
  • Fits 2016-2020 Land Rover Range Rover Sport, upstream, B1S1
  • Fits 2012 Ford Edge, upstream, B1S1
  • Fits 2009-2012 Ford Escape, upstream, B1S1
  • Fits 2012 Ford Explorer, upstream, B1S1
  • Fits 2012 Ford Focus, upstream, B1S1
  • Fits 2010-2012 Ford Fusion, upstream, B1S1
  • Fits 2012 Ford Taurus, upstream rear
  • Fits 2010 Ford Taurus, upstream rear
  • Fits 2011-2012 Lincoln MKZ, upstream, B1S1
  • Fits 2009-2011 Ford E-150, upstream right, B1S1
  • Fits 2010-2011 Ford E-250, upstream right, B1S1
  • Fits 2009-2011 Ford E-350 Super Duty, upstream right, B1S1
  • Fits 2011 Ford Econoline Van, upstream right, to 2/10/2011
  • Fits 2011 Ford Econoline Wagon, upstream right, to 02/10/2011
  • Fits 2009-2011 Ford Expedition, upstream right, B1S1
  • Fits 2011 Ford F-150, upstream right, to 01/03/2011
  • Fits 2011 Ford F-250 Super Duty, upstream right, to 05/02/2011
  • Fits 2011 Ford F-350 Super Duty, upstream right, to 05/02/2011
  • Fits 2011 Ford Flex, upstream rear, to 12/23/2010
  • Fits 2011 Ford Mustang, upstream right
  • Fits 2011 Ford Taurus, upstream rear, to 01/10/2011
  • Fits 2011 Lincoln MKS, upstream rear, to 12/22/2010
  • Fits 2011 Lincoln MKT, upstream rear, to 12/13/2010
  • Fits 2011 Lincoln Navigator, upstream right, to 12/17/2010
  • Fits 2009-2011 Mercury Mariner, upstream, B1S1
  • Fits 2010-2011 Mercury Milan, upstream, B1S1
  • Fits 2010 Ford Econoline Van, upstream right
  • Fits 2010 Ford Econoline Wagon, upstream right
  • Fits 2009-2010 Ford F-150, upstream right, B1S1
  • Fits 2009-2010 Ford Flex, upstream rear, B1S1
  • Fits 2009-2010 Lincoln MKS, upstream rear
  • Fits 2010 Lincoln MKT, upstream rear
  • Fits 2009-2010 Lincoln Navigator, upstream right
  • Fits 2009-2010 Mazda Tribute, upstream, B1S1
  • Fits 2009 Ford E-250, upstream right, B1S2
  • Fits 2008-2009 Ford Taurus, upstream rear, Calif-ESV
  • Fits 2008-2009 Ford Taurus X, upstream rear, Calif-ESV
  • Fits 2008-2009 Mercury Sable, upstream rear, Calif-ESV

What It Helps Address

  • Check engine light related to oxygen sensor performance
  • Poor fuel economy caused by inaccurate exhaust feedback
  • Rough running or drivability issues tied to air-fuel control
  • Elevated exhaust emissions from a failing sensor
  • Fault codes stored in the ECU for the affected sensor circuit

Installation Notes

Confirm the exact vehicle, engine calibration, and sensor position before ordering, since this part is specific to the listed upstream and upstream rear applications. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before installation, and verify the threaded bung is clean and undamaged. Use the correct 22 mm wrench size and thread the sensor to the specified M18 x 1.5 mounting point.

Quality Assurance

Walker Products manufactures engine management and oxygen/air-fuel sensors as OE replacement parts for specific applications. The company is ISO 9001/TS 16949 certified and has produced engine management components since 1946, with cataloging and packaging support built for professional automotive service.

Related reading

This part fits 81 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelTransmissionLitersCylindersFuel TypePositionNotes
2021Land RoverRange Rover—3.0LV6DIESELUpstreamOE Replacement
2021Land RoverRange Rover Sport—3.0LV6DIESELUpstreamOE Replacement
2020Land RoverRange Rover—3.0LV6DIESELUpstreamOE Replacement
2020Land RoverRange Rover Sport—3.0LV6DIESELUpstreamB1S1; OE Replacement
2019Land RoverRange Rover—3.0LV6DIESELUpstreamOE Replacement
2019Land RoverRange Rover Sport—3.0LV6DIESELUpstreamB1S1; OE Replacement
2018Land RoverRange Rover—3.0LV6DIESELUpstreamOE Replacement
2018Land RoverRange Rover Sport—3.0LV6DIESELUpstreamB1S1; OE Replacement
2017Land RoverRange Rover—3.0LV6DIESELUpstreamOE Replacement
2017Land RoverRange Rover Sport—3.0LV6DIESELUpstreamB1S1; OE Replacement
2016Land RoverRange Rover—3.0LV6DIESELUpstreamOE Replacement
2016Land RoverRange Rover Sport—3.0LV6DIESELUpstreamB1S1; OE Replacement
2012FordEdge—2.0LL4—UpstreamB1S1; OE Replacement
2012FordEscapeAutomatic CVT2.5LL4FULL HYBRID EV-GAS (FHEV)UpstreamB1S1; OE Replacement
2012FordExplorer—2.0LL4—UpstreamB1S1; OE Replacement
2012FordF-450 Super Duty—6.8LV10—Upstream RightOE Replacement
2012FordF-550 Super Duty—6.8LV10—Upstream RightOE Replacement
2012FordFocus—2.0LL4—UpstreamB1S1; OE Replacement
2012FordFusion—2.5LL4FULL HYBRID EV-GAS (FHEV)UpstreamB1S1; OE Replacement
2012FordTaurus—3.5LV6—Upstream RearOE Replacement
2012LincolnMKZ—2.5LL4FULL HYBRID EV-GAS (FHEV)UpstreamB1S1; OE Replacement
2011FordE-150—5.4LV8—Upstream RightB1S1; OE Replacement
2011FordE-250—5.4LV8—Upstream RightB1S1; OE Replacement
2011FordE-350 Super Duty—5.4LV8—Upstream RightB1S1; OE Replacement
2011FordE-450 Super Duty—5.4LV8—Upstream RightB1S1; OE Replacement
2011FordEconoline Van—4.6LV8—Upstream RightTo 2/10/2011; OE Replacement
2011FordEconoline Wagon—5.4LV8—Upstream RightTo 02/10/2011; OE Replacement
2011FordEscapeAutomatic CVT2.5LL4FULL HYBRID EV-GAS (FHEV)UpstreamB1S1; OE Replacement
2011FordExpedition—5.4LV8—Upstream RightB1S1; OE Replacement
2011FordF-150—6.2LV8—Upstream RightTo 01/03/2011; OE Replacement
2011FordF-250 Super Duty—6.2LV8—Upstream RightTo 05/02/2011; OE Replacement
2011FordF-350 Super Duty—6.2LV8—Upstream RightTo 05/02/2011; OE Replacement
2011FordF-450 Super Duty—6.8LV10—Upstream RightOE Replacement
2011FordF-550 Super Duty—6.8LV10—Upstream RightOE Replacement
2011FordFlex—3.5LV6—Upstream RearTo 12/23/2010; OE Replacement
2011FordFusion—2.5LL4FULL HYBRID EV-GAS (FHEV)UpstreamB1S1; OE Replacement
2011FordLobo—5.0LV8—Upstream RightTo 02/24/2011; OE Replacement
2011FordMustang—5.0LV8—Upstream RightOE Replacement
2011FordTaurus—3.5LV6—Upstream RearTo 01/10/2011; OE Replacement
2011LincolnMKS—3.7LV6GASUpstream RearTo 12/22/2010; OE Replacement
2011LincolnMKT—3.7LV6GASUpstream RearTo 12/13/2010; OE Replacement
2011LincolnMKZ—2.5LL4FULL HYBRID EV-GAS (FHEV)UpstreamB1S1; OE Replacement
2011LincolnNavigator—5.4LV8FLEXUpstream RightTo 12/17/2010; OE Replacement
2011MercuryMariner—2.5LL4FULL HYBRID EV-GAS (FHEV)UpstreamB1S1; OE Replacement
2011MercuryMilan—2.5LL4FULL HYBRID EV-GAS (FHEV)UpstreamB1S1; OE Replacement
2010FordE-150—5.4LV8—Upstream RightB1S1; OE Replacement
2010FordE-250—5.4LV8—Upstream RightB1S1; OE Replacement
2010FordE-350 Super Duty—5.4LV8—Upstream RightB1S1; OE Replacement
2010FordE-450 Super Duty—5.4LV8—Upstream RightB1S1; OE Replacement
2010FordEconoline Van—4.6LV8—Upstream RightOE Replacement
2010FordEconoline Wagon—5.4LV8—Upstream RightOE Replacement
2010FordEscape—2.5LL4FULL HYBRID EV-GAS (FHEV)UpstreamB1S1; OE Replacement
2010FordExpedition—5.4LV8—Upstream RightB1S1; OE Replacement
2010FordF-150—5.4LV8—Upstream RightB1S1; OE Replacement
2010FordFlex—3.5LV6—Upstream RearB1S1; OE Replacement
2010FordFusion—2.5LL4FULL HYBRID EV-GAS (FHEV)UpstreamB1S1; OE Replacement
2010FordTaurus—3.5LV6—Upstream RearOE Replacement
2010LincolnMKS—3.7LV6GASUpstream RearOE Replacement
2010LincolnMKT—3.7LV6GASUpstream RearOE Replacement
2010LincolnNavigator—5.4LV8FLEXUpstream RightOE Replacement
2010MazdaTribute—2.5LL4FULL HYBRID EV-GAS (FHEV)UpstreamB1S1; OE Replacement
2010MercuryMariner—2.5LL4FULL HYBRID EV-GAS (FHEV)UpstreamB1S1; OE Replacement
2010MercuryMilan—2.5LL4FULL HYBRID EV-GAS (FHEV)UpstreamB1S1; OE Replacement
2009FordE-150—5.4LV8—Upstream RightB1S1; OE Replacement
2009FordE-250—5.4LV8—Upstream RightB1S2; OE Replacement
2009FordE-350 Super Duty—5.4LV8—Upstream RightB1S1; OE Replacement
2009FordE-450 Super Duty—5.4LV8—Upstream RightB1S1; OE Replacement
2009FordEscape—2.5LL4FULL HYBRID EV-GAS (FHEV)UpstreamB1S1; OE Replacement
2009FordExpedition—5.4LV8—Upstream RightB1S1; OE Replacement
2009FordF-150—5.4LV8—Upstream RightB1S1; OE Replacement
2009FordFlex—3.5LV6—Upstream RearB1S1; OE Replacement
2009FordTaurus—3.5LV6—Upstream RearCalif-ESV; OE Replacement
2009FordTaurus X—3.5LV6—Upstream RearCalif-ESV; OE Replacement
2009LincolnMKS—3.7LV6GASUpstream RearOE Replacement
2009LincolnNavigator—5.4LV8FLEXUpstream RightOE Replacement
2009MazdaTribute—2.5LL4FULL HYBRID EV-GAS (FHEV)UpstreamB1S1; OE Replacement
2009MercuryMariner—2.5LL4FULL HYBRID EV-GAS (FHEV)UpstreamB1S1; OE Replacement
2009MercurySable—3.5LV6GASUpstream RearCalif-ESV; OE Replacement
2008FordTaurus—3.5LV6—Upstream RearCalif-ESV; OE Replacement
2008FordTaurus X—3.5LV6—Upstream RearCalif-ESV; OE Replacement
2008MercurySable—3.5LV6GASUpstream RearCalif-ESV; OE Replacement