HomeEmission Control > SensorsWalker 350-34033 Oxygen Sensor - Upstream or Upstream Right
Part #: 350-34033

Walker 350-34033 Oxygen Sensor - Upstream or Upstream Right

Walker Products Aftermarket, Upstream
44 vehicles fit this part
Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
Walker Products Aftermarket, Upstream
Fitment: Mitsubishi, Lancer, Montero, and Montero Sport
Easy Returns — Return within 60 days for a full refund
Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Walker Oxygen Sensor 350-34033

The Walker 350-34033 oxygen sensor is designed specifically for Mitsubishi vehicles, including the Lancer, Montero, and Montero Sport models. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by providing precise air-fuel mixture data to the vehicle's engine control unit.

  • Heated oxygen sensor with 4-wire design for reliable operation
  • Specific fit for Mitsubishi Lancer, Montero, and Montero Sport
  • 26.1-inch wiring harness length for flexible installation
  • Threaded mounting type with 18.0 mm thread diameter
  • Radiused polygon male connector for secure electrical connection
  • Wire gauge measurement of 20 for durability and signal integrity
  • Overall length of 29.65 inches to accommodate factory fitment

Detailed Product Description

This Walker Products Aftermarket oxygen sensor (part number 350-34033) is engineered to meet the exact specifications required by Mitsubishi vehicles such as the Lancer, Montero, and Montero Sport. Featuring a heated sensor type, it quickly reaches operating temperature to provide accurate oxygen level readings, which are critical for maintaining efficient combustion and reducing emissions. The sensor includes a 4-wire configuration, which supports both the sensor signal and the heating element, ensuring consistent performance under various driving conditions.

The wiring harness length of 26.1 inches offers sufficient reach for straightforward installation without the need for extensions. The connector is a radiused polygon shape with a male gender, designed to match the factory wiring harness for a secure and reliable connection. The threaded mounting type with an 18.0 mm diameter allows for direct replacement without modification, maintaining the integrity of the exhaust system.

Common Applications and Issues Addressed

  • Restores accurate air-fuel ratio readings for improved fuel efficiency
  • Helps resolve engine misfires related to faulty oxygen sensors
  • Reduces emissions by ensuring proper catalytic converter function
  • Eliminates check engine light codes related to oxygen sensor failure
  • Improves overall engine performance and drivability

Installation Notes and Tips

  • Ensure the vehicle is cool before removing the old sensor to avoid burns
  • Use an oxygen sensor socket or appropriate tool for removal and installation
  • Apply anti-seize compound to the sensor threads if not pre-coated
  • Verify connector compatibility with the factory harness before installation
  • Follow vehicle manufacturer torque specifications when tightening the sensor

Quality Assurance and Warranty

Walker Products Aftermarket parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 350-34033 oxygen sensor undergoes rigorous testing to ensure durability and reliable performance in emission control systems. While specific warranty details may vary, Walker typically offers coverage against defects in materials and workmanship to provide confidence in the product's longevity and effectiveness.

BrandWalker
Part Number350-34033
PositionWalker Products Aftermarket, Upstream
Connector GenderMale
Connector ShapeRadiused Polygon
Mounting TypeThreaded
Overall Length29.65
Sensor TypeHeated
Thread Diameter18.0
Universal Or Specific FitSpecific
Wire Gauge Measurement20
Wire Quantity4
Wiring Harness Length26.1

This part fits 44 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
2019MitsubishiMontero3.8LV6Upstream RightOE Replacement
2018MitsubishiMontero3.8LV6Upstream RightOE Replacement
2017MitsubishiMontero3.8LV6Upstream RightOE Replacement
2015MitsubishiMontero3.8LV6Upstream RightOE Replacement
2014MitsubishiMontero3.8LV6Upstream RightOE Replacement
2013MitsubishiMontero3.8LV6Upstream RightOE Replacement
2012MitsubishiMontero3.8LV6Upstream RightOE Replacement
2011MitsubishiMontero3.8LV6Upstream RightOE Replacement
2010MitsubishiMontero3.8LV6Upstream RightOE Replacement
2009MitsubishiMontero3.8LV6Upstream RightOE Replacement
2008MitsubishiMontero3.8LV6Upstream RightFrom 09/01/2007; OE Replacement
2008MitsubishiMontero Sport3.5LV6Upstream RightOE Replacement
2007MitsubishiMontero Sport3.5LV6Upstream RightOE Replacement
2006MitsubishiLancer2.0LL4GASUpstreamBank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products Aftermarket
2006MitsubishiLancer2.0LL4GASUpstreamFront oxygen sensor compatible with various vehicle models.; Walker Products Aftermarket
2006MitsubishiMontero3.8LV6GASUpstream RightInstall upstream oxygen sensor on the right side.; Walker Products Aftermarket
2006MitsubishiMontero Sport3.5LV6Upstream RightOE Replacement
2005MitsubishiLancer2.0LL4GASUpstreamBank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products Aftermarket
2005MitsubishiLancer2.0LL4GASUpstreamFront oxygen sensor compatible with various vehicle models.; Walker Products Aftermarket
2005MitsubishiMontero3.8LV6GASUpstream RightInstall upstream oxygen sensor on the right side.; Walker Products Aftermarket
2005MitsubishiMontero Sport3.5LV6Upstream RightOE Replacement
2004MitsubishiLancer2.0LL4GASUpstreamTo 09/01/03; B1S1; Al 09/01/03; Upstream; Walker Products Aftermarket
2004MitsubishiLancer2.0LL4GASUpstreamFrom 09/02/03; B1S1; Del 02/09/03; Upstream; Walker Products Aftermarket
2004MitsubishiLancer2.0LL4GASUpstreamTo 09/01/03; Al 09/01/03; Upstream; B1S1; Walker Products Aftermarket
2004MitsubishiLancer2.0LL4GASUpstreamFrom 09/02/03; Del 02/09/03; Upstream; B1S1; Walker Products Aftermarket
2004MitsubishiLancer2.0LL4GASUpstreamTo 09/01/03; B1S1; Upstream; Walker Products Aftermarket
2004MitsubishiLancer2.0LL4GASUpstreamFrom 09/02/03; B1S1; Upstream; Walker Products Aftermarket
2004MitsubishiMontero3.8LV6GASUpstream RightInstall upstream oxygen sensor on the right side.; Walker Products Aftermarket
2004MitsubishiMontero Sport3.5LV6GASUpstream RightInstall upstream oxygen sensor on the right side.; Walker Products Aftermarket
2003MitsubishiLancer2.0LL4GASUpstreamBank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products Aftermarket
2003MitsubishiLancer2.0LL4GASUpstreamFront oxygen sensor compatible with various vehicle models.; Walker Products Aftermarket
2003MitsubishiMontero3.8LV6GASUpstream RightInstall upstream oxygen sensor on the right side.; Walker Products Aftermarket
2003MitsubishiMontero Sport3.5LV6GASUpstream RightInstall upstream oxygen sensor on the right side.; Walker Products Aftermarket
2003MitsubishiMontero Sport3.0LV6GASUpstream RightInstall upstream oxygen sensor on the right side.; Walker Products Aftermarket
2002MitsubishiMontero3.5LV6GASUpstream RightInstall upstream oxygen sensor on the right side.; Walker Products Aftermarket
2002MitsubishiMontero Sport3.5LV6GASUpstream RightInstall upstream oxygen sensor on the right side.; Walker Products Aftermarket
2002MitsubishiMontero Sport3.0LV6GASUpstream RightInstall upstream oxygen sensor on the right side.; Walker Products Aftermarket
2001MitsubishiMontero3.5LV6GASUpstream RightInstall upstream oxygen sensor on the right side.; Walker Products Aftermarket
2001MitsubishiMontero Sport3.5LV6GASUpstream RightInstall upstream oxygen sensor on the right side.; Walker Products Aftermarket
2001MitsubishiMontero Sport3.0LV6GASUpstream RightInstall upstream oxygen sensor on the right side.; Walker Products Aftermarket
2000MitsubishiMontero Sport3.5LV6GASUpstream RightCalifornia emissions; upstream right position; Walker Products Aftermarket
2000MitsubishiMontero Sport3.0LV6GASUpstream RightCalifornia emissions; upstream right position; Walker Products Aftermarket
1999MitsubishiMontero Sport3.5LV6GASUpstream RightCalifornia emissions; upstream right position; Walker Products Aftermarket
1999MitsubishiMontero Sport3.0LV6GASUpstream RightCalifornia emissions; upstream right position; Walker Products Aftermarket

* 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:

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.