HomeEmission Control > SensorsWalker 350-34579 Oxygen Sensor - Upstream
Part #: 350-34579

Walker 350-34579 Oxygen Sensor - Upstream

Walker Products Aftermarket, Upstream
12 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$65.80Free 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
Walker Products Aftermarket, Upstream
Fitment: Geo and Toyota, Prizm and Corolla
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 350-34579

The Walker 350-34579 oxygen sensor is designed specifically for select Geo and Toyota vehicles, including the Corolla and Prizm models. This heated oxygen sensor features a 7.4-inch wiring harness and a radiused polygon male connector, ensuring precise fitment and reliable performance.

  • Heated oxygen sensor type for faster response times
  • Specific fit for Geo Corolla and Toyota Prizm
  • 7.4-inch wiring harness length with 20 gauge wire
  • Four-wire configuration with radiused polygon male connector
  • Flange mount with 18.0 mm thread diameter and 10.94-inch overall length

Detailed Product Description

This Walker oxygen sensor (part number 350-34579) is engineered to meet the exact specifications of your Geo Corolla and Toyota Prizm. The sensor’s heated design allows it to reach operating temperature quickly, improving fuel efficiency and emissions control. It features a 7.4-inch wiring harness with 20 gauge wires, providing durability and optimal electrical conductivity. The four-wire setup supports both the sensor signal and heater circuit, while the radiused polygon male connector ensures a secure and precise connection. The flange mount design with an 18.0 mm thread diameter and an overall length of 10.94 inches facilitates straightforward installation and proper positioning within the exhaust system.

Walker Products Aftermarket Line

Walker Products Aftermarket offers a range of emission control components designed to meet or exceed OEM standards. This oxygen sensor is part of their sensor lineup, focusing on reliable fitment and consistent performance for specific vehicle applications. The product line emphasizes compatibility and quality, making it suitable for maintaining emission compliance on Geo and Toyota models.

Common Applications and Issues Addressed

  • Restores accurate oxygen sensing for improved engine management
  • Helps resolve rough idling caused by faulty sensor readings
  • Reduces excessive fuel consumption linked to sensor failure
  • Assists in correcting check engine light codes related to O2 sensors
  • Supports emission system compliance for Geo Corolla and Toyota Prizm

Installation Notes and Tips

When installing the Walker 350-34579 oxygen sensor, ensure the flange mount is properly seated and the 18.0 mm thread is tightened to manufacturer torque specifications. Verify the four-wire harness is connected to the corresponding vehicle wiring harness using the radiused polygon male connector to avoid misalignment. It is recommended to inspect the exhaust port for debris before installation to ensure optimal sensor performance.

Quality Assurance and Warranty

Walker Products Aftermarket oxygen sensors are manufactured to meet stringent quality standards. While specific warranty details for part number 350-34579 should be confirmed with the supplier, Walker typically offers coverage against defects in materials and workmanship to support long-term reliability.

BrandWalker
Part Number350-34579
PositionWalker Products Aftermarket, Upstream
Connector GenderMale
Connector ShapeRadiused Polygon
Mounting TypeFlange Mount
Overall Length10.94
Sensor TypeHeated
Thread Diameter18.0
Universal Or Specific FitSpecific
Wire Gauge Measurement20
Wire Quantity4
Wiring Harness Length7.4

This part fits 12 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
1992GeoPrizm1.6LL4GASUpstreamCompatible with California-ESV vehicles, Upstream Oxygen Sensor; Walker Products Aftermarket
1992GeoPrizm1.6LL4GASUpstreamCalifornia emissions ESV vehicles oxygen sensor; Walker Products Aftermarket
1991GeoPrizm1.6LL4GASUpstreamCompatible with California-ESV vehicles, Upstream Oxygen Sensor; Walker Products Aftermarket
1991GeoPrizm1.6LL4GASUpstreamCalifornia emissions ESV vehicles oxygen sensor; Walker Products Aftermarket
1991ToyotaCorolla1.6LL4GASUpstreamCompatible with California-ESV vehicles, Upstream Oxygen Sensor; Walker Products Aftermarket
1991ToyotaCorolla1.6LL4GASUpstreamCalifornia emissions ESV vehicles oxygen sensor; Walker Products Aftermarket
1990GeoPrizm1.6LL4GASUpstreamCompatible with California-ESV vehicles, Upstream Oxygen Sensor; Walker Products Aftermarket
1990GeoPrizm1.6LL4GASUpstreamCalifornia emissions ESV vehicles oxygen sensor; Walker Products Aftermarket
1990ToyotaCorolla1.6LL4GASUpstreamCompatible with California-ESV vehicles, Upstream Oxygen Sensor; Walker Products Aftermarket
1990ToyotaCorolla1.6LL4GASUpstreamCalifornia emissions ESV vehicles oxygen sensor; Walker Products Aftermarket
1989ToyotaCorolla1.6LL4GASUpstreamCompatible with California-ESV vehicles, Upstream Oxygen Sensor; Walker Products Aftermarket
1989ToyotaCorolla1.6LL4GASUpstreamCalifornia emissions ESV vehicles oxygen sensor; 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.