OE Quality
60-Day Returns

Walker 350-64126 Oxygen Sensor - Upstream or Upstream Rear
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:
| Year | Make | Model | Submodel | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|---|
| 2022 | Lexus | RX350 | 3.5L | V6 | Upstream Right | OE Replacement | ||
| 2022 | Lexus | RX350L | 3.5L | V6 | Upstream Left | OE Replacement | ||
| 2022 | Lexus | RX450hL | 3.5L | V6 | Upstream Left | OE Replacement | ||
| 2021 | Lexus | RX350 | 3.5L | V6 | GAS | Upstream Rear | Japan Built Vehicle; VehÃculo hecho en Japón; Upstream; Rear; Walker Products Aftermarket | |
| 2021 | Lexus | RX350 | 3.5L | V6 | GAS | Upstream Rear | Japan Built Vehicle; Upstream; Rear; Walker Products Aftermarket | |
| 2021 | Lexus | RX350L | 3.5L | V6 | GAS | Upstream Rear | Upstream oxygen sensor for rear exhaust system.; Walker Products Aftermarket | |
| 2021 | Lexus | RX450hL | 3.5L | V6 | ELECTRIC/GAS | Upstream Rear | Upstream oxygen sensor for rear exhaust system.; Walker Products Aftermarket | |
| 2020 | Lexus | RX350 | 3.5L | V6 | GAS | Upstream Rear | Japan Built Vehicle; VehÃculo hecho en Japón; Upstream; Rear; Walker Products Aftermarket | |
| 2020 | Lexus | RX350 | 3.5L | V6 | GAS | Upstream Rear | Japan Built Vehicle; Upstream; Rear; Walker Products Aftermarket | |
| 2020 | Lexus | RX350L | 3.5L | V6 | GAS | Upstream Rear | Upstream oxygen sensor for rear exhaust system.; Walker Products Aftermarket | |
| 2019 | Lexus | RX350 | 3.5L | V6 | GAS | Upstream Rear | Japan Built Vehicle; VehÃculo hecho en Japón; Upstream; Rear; Walker Products Aftermarket | |
| 2019 | Lexus | RX350 | 3.5L | V6 | GAS | Upstream Rear | Japan Built Vehicle; Upstream; Rear; Walker Products Aftermarket | |
| 2019 | Lexus | RX350L | 3.5L | V6 | GAS | Upstream Rear | Upstream oxygen sensor for rear exhaust system.; Walker Products Aftermarket | |
| 2019 | Toyota | Highlander | LE | 2.7L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products Aftermarket |
| 2019 | Toyota | Highlander | LE | 2.7L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products Aftermarket |
| 2018 | Lexus | RX350 | 3.5L | V6 | GAS | Upstream Rear | Japan Built Vehicle; VehÃculo hecho en Japón; Upstream; Rear; Walker Products Aftermarket | |
| 2018 | Lexus | RX350 | 3.5L | V6 | GAS | Upstream Rear | Japan Built Vehicle; Upstream; Rear; Walker Products Aftermarket | |
| 2018 | Lexus | RX350L | 3.5L | V6 | GAS | Upstream Rear | Upstream oxygen sensor for rear exhaust system.; Walker Products Aftermarket | |
| 2018 | Toyota | Highlander | LE | 2.7L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products Aftermarket |
| 2018 | Toyota | Highlander | LE | 2.7L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products Aftermarket |
| 2017 | Lexus | RX350 | 3.5L | V6 | GAS | Upstream Rear | Japan Built Vehicle; VehÃculo hecho en Japón; Upstream; Rear; Walker Products Aftermarket | |
| 2017 | Lexus | RX350 | 3.5L | V6 | GAS | Upstream Rear | Japan Built Vehicle; Upstream; Rear; Walker Products Aftermarket | |
| 2017 | Toyota | Highlander | LE | 2.7L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products Aftermarket |
| 2017 | Toyota | Highlander | LE | 2.7L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products Aftermarket |
| 2016 | Lexus | RX350 | 3.5L | V6 | GAS | Upstream Rear | Japan Built Vehicle; VehÃculo hecho en Japón; Upstream; Rear; Walker Products Aftermarket | |
| 2016 | Lexus | RX350 | 3.5L | V6 | GAS | Upstream Rear | Japan Built Vehicle; Upstream; Rear; Walker Products Aftermarket | |
| 2016 | Toyota | Highlander | LE | 2.7L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products Aftermarket |
| 2016 | Toyota | Highlander | LE | 2.7L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products Aftermarket |
| 2015 | Toyota | Highlander | LE | 2.7L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products Aftermarket |
| 2015 | Toyota | Highlander | LE | 2.7L | L4 | GAS | Upstream | Front 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.