Walker 350-34717 Oxygen Sensor - Upstream

Walker 350-34717 Oxygen Sensor for Toyota Avanza

Walker Products 350-34717 is an upstream oxygen sensor engineered as an OE-style replacement for select 2012-2015 Toyota Avanza applications. It is built to deliver the diagnostic feedback the ECU expects, helping maintain proper air-fuel control and emissions monitoring.

Key Features

• Upstream oxygen sensor for Bank 1 Sensor 1 applications
• Direct-fit replacement for select Toyota Avanza models
• Supports ECU feedback for fuel control and emissions monitoring
• Walker Products Aftermarket engine management sensor line
• Part number 350-34717 for application-specific lookup

Product Details

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors developed for specific vehicle applications and sensor positions. The 350-34717 is intended for the upstream location on compatible Toyota Avanza models, where accurate exhaust feedback is critical for engine management. For buyers searching for a Toyota Avanza upstream oxygen sensor, Bank 1 Sensor 1 replacement, or Walker 350-34717, this part is matched to the listed fitment and position.

Fits 2012-2015 Toyota Avanza, upstream. Fits 2012-2015 Toyota Avanza, upstream, Bank 1 Sensor 1.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Poor engine operation caused by incorrect exhaust feedback
• Increased fuel consumption from inaccurate air-fuel readings
• Higher exhaust emissions from a failing upstream sensor
• Fault codes stored in the ECU for the affected sensor circuit

Installation Notes and Tips

Confirm the sensor position before ordering, since this part is specified for the upstream location. Inspect the sensor wiring harness and connector for heat damage, corrosion, or broken terminals before installation. If the vehicle has stored fault codes, verify the related circuit and clear codes after the repair is completed.

Quality Assurance

Walker Products has supplied engine management components since 1946 and manufactures sensors for application-specific fitment and ECU feedback requirements. The company is ISO 9001 and TS 16949 certified, supporting consistent production standards for replacement oxygen sensors such as 350-34717.