HomeEmission Control > SensorsWalker 350-64126 Oxygen Sensor - Upstream or Upstream Rear
Part #: 350-64126

Walker 350-64126 Oxygen Sensor - Upstream or Upstream Rear

Walker Products Aftermarket, Upstream Rear
30 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
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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 Rear
Fitment: Lexus and Toyota, RX350, RX350L, RX450hL, and Highlander
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 350-64126

The Walker 350-64126 oxygen sensor is designed for precise emission control in select Lexus and Toyota vehicles. This sensor helps maintain optimal engine performance and emissions compliance for models like the Toyota Highlander and Lexus RX350 series.

  • Compatible with Lexus Highlander, RX350, RX350L, and RX450hL models
  • Part of the Walker Products Aftermarket line, ensuring reliable replacement quality
  • Part number 350-64126 for accurate identification and fitment
  • Designed to monitor oxygen levels in the exhaust system for efficient fuel management
  • Supports emission control system functionality to meet regulatory standards

Product Details and Brand Line Information

This oxygen sensor, part number 350-64126, belongs to the Walker Products Aftermarket line, which focuses on providing dependable emission control components for a variety of vehicle makes and models. Walker Products Aftermarket parts are engineered to meet or exceed OEM specifications, offering a practical solution for maintaining the emission systems of Lexus and Toyota vehicles. This sensor is specifically calibrated to work with the exhaust systems of the Highlander, RX350, RX350L, and RX450hL, ensuring accurate oxygen level readings and consistent engine performance.

Function and Application

The Walker 350-64126 oxygen sensor plays a critical role in the vehicle's emission control system by measuring the oxygen content in the exhaust gases. This data is used by the engine control unit (ECU) to adjust the air-fuel mixture for optimal combustion efficiency.

  • Helps reduce harmful emissions by ensuring proper fuel mixture
  • Prevents engine performance issues related to incorrect oxygen readings
  • Addresses check engine light triggers related to oxygen sensor faults
  • Improves fuel economy by maintaining efficient combustion
  • Supports compliance with emission regulations for Lexus and Toyota vehicles

Installation Notes and Tips

When installing the Walker 350-64126 oxygen sensor, ensure the vehicle is compatible by verifying the make and model: Lexus Highlander, RX350, RX350L, or RX450hL. Use proper tools to avoid damaging the sensor or exhaust components. It is recommended to disconnect the battery before installation to prevent electrical issues. After installation, clear any diagnostic trouble codes and perform a test drive to confirm proper sensor operation.

Quality Assurance and Warranty

Walker Products Aftermarket parts, including the 350-64126 oxygen sensor, are manufactured to meet industry standards for durability and performance. While specific warranty details are not provided here, Walker typically offers coverage against defects in materials and workmanship. For exact warranty terms, consult the product documentation or manufacturer resources.

This part fits 30 vehicles. Search below:

YearMakeModelSubmodelLitersCylindersFuel TypePositionNotes
2022LexusRX3503.5LV6Upstream RightOE Replacement
2022LexusRX350L3.5LV6Upstream LeftOE Replacement
2022LexusRX450hL3.5LV6Upstream LeftOE Replacement
2021LexusRX3503.5LV6GASUpstream RearJapan Built Vehicle; Vehículo hecho en Japón; Upstream; Rear; Walker Products Aftermarket
2021LexusRX3503.5LV6GASUpstream RearJapan Built Vehicle; Upstream; Rear; Walker Products Aftermarket
2021LexusRX350L3.5LV6GASUpstream RearUpstream oxygen sensor for rear exhaust system.; Walker Products Aftermarket
2021LexusRX450hL3.5LV6ELECTRIC/GASUpstream RearUpstream oxygen sensor for rear exhaust system.; Walker Products Aftermarket
2020LexusRX3503.5LV6GASUpstream RearJapan Built Vehicle; Vehículo hecho en Japón; Upstream; Rear; Walker Products Aftermarket
2020LexusRX3503.5LV6GASUpstream RearJapan Built Vehicle; Upstream; Rear; Walker Products Aftermarket
2020LexusRX350L3.5LV6GASUpstream RearUpstream oxygen sensor for rear exhaust system.; Walker Products Aftermarket
2019LexusRX3503.5LV6GASUpstream RearJapan Built Vehicle; Vehículo hecho en Japón; Upstream; Rear; Walker Products Aftermarket
2019LexusRX3503.5LV6GASUpstream RearJapan Built Vehicle; Upstream; Rear; Walker Products Aftermarket
2019LexusRX350L3.5LV6GASUpstream RearUpstream oxygen sensor for rear exhaust system.; Walker Products Aftermarket
2019ToyotaHighlanderLE2.7LL4GASUpstreamBank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products Aftermarket
2019ToyotaHighlanderLE2.7LL4GASUpstreamFront oxygen sensor compatible with various vehicle models.; Walker Products Aftermarket
2018LexusRX3503.5LV6GASUpstream RearJapan Built Vehicle; Vehículo hecho en Japón; Upstream; Rear; Walker Products Aftermarket
2018LexusRX3503.5LV6GASUpstream RearJapan Built Vehicle; Upstream; Rear; Walker Products Aftermarket
2018LexusRX350L3.5LV6GASUpstream RearUpstream oxygen sensor for rear exhaust system.; Walker Products Aftermarket
2018ToyotaHighlanderLE2.7LL4GASUpstreamBank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products Aftermarket
2018ToyotaHighlanderLE2.7LL4GASUpstreamFront oxygen sensor compatible with various vehicle models.; Walker Products Aftermarket
2017LexusRX3503.5LV6GASUpstream RearJapan Built Vehicle; Vehículo hecho en Japón; Upstream; Rear; Walker Products Aftermarket
2017LexusRX3503.5LV6GASUpstream RearJapan Built Vehicle; Upstream; Rear; Walker Products Aftermarket
2017ToyotaHighlanderLE2.7LL4GASUpstreamBank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products Aftermarket
2017ToyotaHighlanderLE2.7LL4GASUpstreamFront oxygen sensor compatible with various vehicle models.; Walker Products Aftermarket
2016LexusRX3503.5LV6GASUpstream RearJapan Built Vehicle; Vehículo hecho en Japón; Upstream; Rear; Walker Products Aftermarket
2016LexusRX3503.5LV6GASUpstream RearJapan Built Vehicle; Upstream; Rear; Walker Products Aftermarket
2016ToyotaHighlanderLE2.7LL4GASUpstreamBank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products Aftermarket
2016ToyotaHighlanderLE2.7LL4GASUpstreamFront oxygen sensor compatible with various vehicle models.; Walker Products Aftermarket
2015ToyotaHighlanderLE2.7LL4GASUpstreamBank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products Aftermarket
2015ToyotaHighlanderLE2.7LL4GASUpstreamFront oxygen sensor compatible with various vehicle models.; 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.