Walker 350-34593 Oxygen Sensor - Downstream

Walker Oxygen Sensor for Mazda MX-5

Walker Products 350-34593 is a heated oxygen sensor built as a specific-fit replacement for select Mazda MX-5 and Mazda MX-5 Miata applications. It is designed to provide the ECU with the correct exhaust feedback for downstream bank 1 sensor 2 locations.

Key Features

• Heated oxygen sensor for downstream monitoring
• Specific fitment for select Mazda MX-5 and MX-5 Miata models
• 4-wire design with female connector
• Threaded mounting type with 18.0 mm thread diameter
• Wiring harness length: 15.28 in.; overall length: 18.82 in.
• Walker Products Aftermarket part number 350-34593

Product Details

Walker Products 350-34593 is part of the Walker Products Aftermarket engine management line, which focuses on OE-style replacement sensors for vehicle-specific applications. This heated oxygen sensor is engineered for downstream bank 1 sensor 2 placement on select 2006-2015 Mazda MX-5 and Mazda MX-5 Miata models, helping the ECU monitor exhaust system performance and maintain proper diagnostic feedback. The radiused polygon connector, 20-gauge wiring, and threaded mount support a direct-fit installation on the listed applications. This part number, 350-34593, is a practical choice when replacing a failed downstream oxygen sensor on a Mazda MX-5 or Mazda MX-5 Miata.

Common Issues This Sensor May Address

• Check engine light related to oxygen sensor performance
• Poor engine operation caused by incorrect exhaust feedback
• Increased fuel consumption from inaccurate air-fuel monitoring
• Higher exhaust emissions from a failing downstream sensor
• Stored ECU fault codes tied to the affected sensor circuit

Installation Notes and Tips

Confirm the vehicle is a 2006-2015 Mazda MX-5 or Mazda MX-5 Miata with downstream bank 1 sensor 2 placement before ordering. Inspect the sensor connector, wiring harness, and nearby exhaust wiring for heat damage or physical wear before installation. Because this is a threaded sensor with a specific connector shape and wire configuration, match the original sensor layout and mounting location carefully. This part cross-references Walker Products Aftermarket 350-34593 for the same application.

Quality Assurance

Walker Products states that its engine management sensors are developed as OE replacement parts and manufactured under Automotive ISO9001/TS 16949 quality systems. Since 1946, the brand has supplied oxygen and air-fuel sensors for vehicle-specific engine management applications.

Compatible Vehicles

• Fits 2006-2015 Mazda MX-5, downstream bank 1 sensor 2.
• Fits 2006-2015 Mazda MX-5 Miata, downstream bank 1 sensor 2.