HomeEmission Control > SensorsWalker 350-34588 Oxygen Sensor - Upstream, Upstream Front or Upstream Rear
Part #: 350-34588

Walker 350-34588 Oxygen Sensor - Upstream, Upstream Front or Upstream Rear

Walker Products Aftermarket, Upstream Front
⚙️ 27 vehicles fit this part
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Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
📦Walker Products Aftermarket, Upstream Front
🚗Fitment: Ford and Mercury, Contour, Cougar, and Mystique
🔄Easy Returns — Return within 60 days for a full refund
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Overview of Walker 350-34588 Oxygen Sensor

The Walker 350-34588 oxygen sensor is designed specifically for select Ford and Mercury vehicles, including the Contour, Cougar, and Mystique models. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by providing precise air-fuel mixture data.

  • Heated sensor type for faster response times
  • Specific fit for Ford Contour, Mercury Cougar, and Mystique
  • 12.32-inch wiring harness length with 20-gauge wire
  • Four-wire configuration with a radiused polygon male connector
  • Threaded mounting type with an 18.0 mm thread diameter
  • Overall length of 15.87 inches for proper installation

Walker Products Aftermarket Line Details

This oxygen sensor is part of the Walker Products Aftermarket line, which focuses on providing reliable emission control components tailored to specific vehicle applications. The line emphasizes precise fitment and quality construction to meet or exceed OEM standards, ensuring compatibility and durability for Ford and Mercury models.

Product Features and Specifications

The Walker 350-34588 oxygen sensor features a heated sensor element that allows it to reach operating temperature quickly, improving emission readings shortly after engine start. The sensor includes a 12.32-inch wiring harness with 20-gauge wires arranged in a four-wire setup, which supports both the sensor signal and heater circuit. The connector is a radiused polygon shape with a male gender, designed to match factory wiring harnesses for a secure connection. The sensor mounts via a threaded fitting with an 18.0 mm diameter, and the overall length of 15.87 inches ensures proper placement within the exhaust system.

Compatible Vehicles and Applications

  • Ford Contour oxygen sensor replacement
  • Mercury Cougar emission sensor upgrade
  • Mercury Mystique oxygen sensor fitment
  • Emission control sensor for specific Ford and Mercury models
  • Replacement part for vehicles requiring a heated oxygen sensor with specific wiring and connector type

Installation Notes and Tips

  • Ensure vehicle compatibility with Ford Contour, Mercury Cougar, or Mystique before installation
  • Use proper tools to remove the old sensor and avoid damaging the threaded mounting area
  • Check connector type and wiring harness length to confirm fitment
  • Apply anti-seize compound on threads if recommended by vehicle manufacturer
  • Verify sensor wiring connections match the factory harness for correct operation

Quality Assurance and Warranty

Walker Products Aftermarket oxygen sensors are manufactured to meet stringent quality standards, providing reliable performance in emission control systems. The 350-34588 part number undergoes rigorous testing to ensure durability and accurate sensor readings. Warranty details are provided by Walker and typically cover defects in materials and workmanship under normal use conditions.

BrandWalker
Part Number350-34588
PositionWalker Products Aftermarket, Upstream Front
Connector GenderMale
Connector ShapeRadiused Polygon
Mounting TypeThreaded
Overall Length15.87
Sensor TypeHeated
Thread Diameter18.0
Universal Or Specific FitSpecific
Wire Gauge Measurement20
Wire Quantity4
Wiring Harness Length12.32

This part fits 27 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
1999FordContour2.5LV6GASUpstream RearUpstream rear oxygen sensor for bank 1 sensor 1 position.; Walker Products Aftermarket
1999FordContour2.5LV6GASUpstream FrontFront position Upstream Oxygen Sensor for Bank 2 Sensor 1 (B2S1); Walker Products Aftermarket
1999FordContour2.5LV6GASUpstream RearCompatible with Bank 1 Sensor 1, rear upstream oxygen sensor.; Walker Products Aftermarket
1999FordContour2.5LV6GASUpstream FrontFront upstream oxygen sensor for bank 2 sensor 1 position.; Walker Products Aftermarket
1999MercuryCougar2.5LV6GASUpstreamTo 5/99; Al 5/99; Upstream; Walker Products Aftermarket
1999MercuryCougar2.5LV6GASUpstreamUpstream Oxygen Sensor fits up to 5/99 models.; Walker Products Aftermarket
1999MercuryMystique2.5LV6GASUpstreamInstall upstream oxygen sensor for optimal performance.; Walker Products Aftermarket
1998FordContour2.5LV6GASUpstream RearUpstream rear oxygen sensor for bank 1 sensor 1 position.; Walker Products Aftermarket
1998FordContour2.5LV6GASUpstream FrontFront position Upstream Oxygen Sensor for Bank 2 Sensor 1 (B2S1); Walker Products Aftermarket
1998FordContour2.5LV6GASUpstream RearCompatible with Bank 1 Sensor 1, rear upstream oxygen sensor.; Walker Products Aftermarket
1998FordContour2.5LV6GASUpstream FrontFront upstream oxygen sensor for bank 2 sensor 1 position.; Walker Products Aftermarket
1998MercuryMystique2.5LV6GASUpstreamInstall upstream oxygen sensor for optimal performance.; Walker Products Aftermarket
1997FordContour2.5LV6GASUpstream RearUpstream rear oxygen sensor for bank 1 sensor 1 position.; Walker Products Aftermarket
1997FordContour2.5LV6GASUpstream FrontFront position Upstream Oxygen Sensor for Bank 2 Sensor 1 (B2S1); Walker Products Aftermarket
1997FordContour2.5LV6GASUpstream RearCompatible with Bank 1 Sensor 1, rear upstream oxygen sensor.; Walker Products Aftermarket
1997FordContour2.5LV6GASUpstream FrontFront upstream oxygen sensor for bank 2 sensor 1 position.; Walker Products Aftermarket
1997MercuryMystique2.5LV6GASUpstreamInstall upstream oxygen sensor for optimal performance.; Walker Products Aftermarket
1996FordContour2.5LV6GASUpstream RearUpstream rear oxygen sensor for bank 1 sensor 1 position.; Walker Products Aftermarket
1996FordContour2.5LV6GASUpstream FrontFront position Upstream Oxygen Sensor for Bank 2 Sensor 1 (B2S1); Walker Products Aftermarket
1996FordContour2.5LV6GASUpstream RearCompatible with Bank 1 Sensor 1, rear upstream oxygen sensor.; Walker Products Aftermarket
1996FordContour2.5LV6GASUpstream FrontFront upstream oxygen sensor for bank 2 sensor 1 position.; Walker Products Aftermarket
1996MercuryMystique2.5LV6GASUpstreamInstall upstream oxygen sensor for optimal performance.; Walker Products Aftermarket
1995FordContour2.5LV6GASUpstream RearUpstream rear oxygen sensor for bank 1 sensor 1 position.; Walker Products Aftermarket
1995FordContour2.5LV6GASUpstream FrontFront position Upstream Oxygen Sensor for Bank 2 Sensor 1 (B2S1); Walker Products Aftermarket
1995FordContour2.5LV6GASUpstream RearCompatible with Bank 1 Sensor 1, rear upstream oxygen sensor.; Walker Products Aftermarket
1995FordContour2.5LV6GASUpstream FrontFront upstream oxygen sensor for bank 2 sensor 1 position.; Walker Products Aftermarket
1995MercuryMystique2.5LV6GASUpstreamInstall upstream oxygen sensor for optimal performance.; 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.