Walker 350-341118 Oxygen Sensor - Downstream or Upstream
Walker OE Replacement Oxygen Sensor 350-341118
Walker OE Replacement oxygen sensor 350-341118 is a specific-fit, heated narrow-band sensor built for direct application coverage on select Mazda models. It is engineered to provide the ECU with the feedback needed for proper fuel control and emissions monitoring, making it a practical choice for Mazda MX-5 Miata and Mazda CX-3 oxygen sensor replacement service.
Key Features
- Heated narrow-band oxygen sensor for OE-style signal response
- Specific-fit design for the listed Mazda applications
- 4-wire configuration with square connector and male terminals
- Threaded mounting with M18 x 1.5 thread size
- Overall length: 458 mm; wiring harness length: 425 mm
- 22 mm wrench size for service access
- Standard replacement grade from Walker OE Replacement
Product Details
Walker Products develops engine management and oxygen/air-fuel sensors as OE replacement parts for vehicle-specific applications. Part number 350-341118 is designed for downstream and upstream positions where listed, including Mazda MX-5 Miata downstream applications and Mazda CX-3 upstream coverage. For drivers searching for a Mazda MX-5 Miata downstream oxygen sensor or a Mazda CX-3 upstream O2 sensor, this part number 350-341118 provides the correct fitment format and sensor style for the specified vehicles.
This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.
What It Helps Address
- Check engine light related to oxygen sensor performance
- Poor fuel economy caused by incorrect exhaust feedback
- Rough engine operation from inaccurate air-fuel monitoring
- Elevated exhaust emissions from a failing sensor
- Stored ECU fault codes tied to the affected sensor circuit
Installation Notes and Tips
Verify the sensor position before ordering, since fitment varies by year, model, and location. Confirm the connector shape, wire count, thread size, and harness length against the original sensor on the vehicle. Inspect the sensor wiring, connector, and nearby harness for heat damage or physical wear before installation, as those issues can shorten sensor life and affect ECU feedback.
- Fits 2022-2025 Mazda MX-5 Miata, downstream
- Fits 2023 Mazda 2, N/A
- Fits 2023 Mazda CX-3, N/A
- Fits 2023 Mazda MX-5, N/A
- Fits 2020-2022 Mazda 2, downstream
- Fits 2022 Mazda CX-3, upstream
- Fits 2019-2022 Mazda MX-5, downstream
- Fits 2019-2021 Mazda CX-3, downstream; B1S2
- Fits 2019-2021 Mazda MX-5 Miata, downstream; B1S2
Quality Assurance
Walker Products has supplied engine management and fuel system components since 1946 and operates as an ISO 9001 / TS 16949 certified company. The OE Replacement line is built around application-specific fitment and diagnostic feedback requirements for modern ECU-controlled vehicles.
Walker 350-341118 Oxygen Sensor - Downstream or Upstream
Walker OE Replacement Oxygen Sensor 350-341118
Walker OE Replacement oxygen sensor 350-341118 is a specific-fit, heated narrow-band sensor built for direct application coverage on select Mazda models. It is engineered to provide the ECU with the feedback needed for proper fuel control and emissions monitoring, making it a practical choice for Mazda MX-5 Miata and Mazda CX-3 oxygen sensor replacement service.
Key Features
- Heated narrow-band oxygen sensor for OE-style signal response
- Specific-fit design for the listed Mazda applications
- 4-wire configuration with square connector and male terminals
- Threaded mounting with M18 x 1.5 thread size
- Overall length: 458 mm; wiring harness length: 425 mm
- 22 mm wrench size for service access
- Standard replacement grade from Walker OE Replacement
Product Details
Walker Products develops engine management and oxygen/air-fuel sensors as OE replacement parts for vehicle-specific applications. Part number 350-341118 is designed for downstream and upstream positions where listed, including Mazda MX-5 Miata downstream applications and Mazda CX-3 upstream coverage. For drivers searching for a Mazda MX-5 Miata downstream oxygen sensor or a Mazda CX-3 upstream O2 sensor, this part number 350-341118 provides the correct fitment format and sensor style for the specified vehicles.
This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.
What It Helps Address
- Check engine light related to oxygen sensor performance
- Poor fuel economy caused by incorrect exhaust feedback
- Rough engine operation from inaccurate air-fuel monitoring
- Elevated exhaust emissions from a failing sensor
- Stored ECU fault codes tied to the affected sensor circuit
Installation Notes and Tips
Verify the sensor position before ordering, since fitment varies by year, model, and location. Confirm the connector shape, wire count, thread size, and harness length against the original sensor on the vehicle. Inspect the sensor wiring, connector, and nearby harness for heat damage or physical wear before installation, as those issues can shorten sensor life and affect ECU feedback.
- Fits 2022-2025 Mazda MX-5 Miata, downstream
- Fits 2023 Mazda 2, N/A
- Fits 2023 Mazda CX-3, N/A
- Fits 2023 Mazda MX-5, N/A
- Fits 2020-2022 Mazda 2, downstream
- Fits 2022 Mazda CX-3, upstream
- Fits 2019-2022 Mazda MX-5, downstream
- Fits 2019-2021 Mazda CX-3, downstream; B1S2
- Fits 2019-2021 Mazda MX-5 Miata, downstream; B1S2
Quality Assurance
Walker Products has supplied engine management and fuel system components since 1946 and operates as an ISO 9001 / TS 16949 certified company. The OE Replacement line is built around application-specific fitment and diagnostic feedback requirements for modern ECU-controlled vehicles.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
Walker OE Replacement Oxygen Sensor 350-341118
Walker OE Replacement oxygen sensor 350-341118 is a specific-fit, heated narrow-band sensor built for direct application coverage on select Mazda models. It is engineered to provide the ECU with the feedback needed for proper fuel control and emissions monitoring, making it a practical choice for Mazda MX-5 Miata and Mazda CX-3 oxygen sensor replacement service.
Key Features
- Heated narrow-band oxygen sensor for OE-style signal response
- Specific-fit design for the listed Mazda applications
- 4-wire configuration with square connector and male terminals
- Threaded mounting with M18 x 1.5 thread size
- Overall length: 458 mm; wiring harness length: 425 mm
- 22 mm wrench size for service access
- Standard replacement grade from Walker OE Replacement
Product Details
Walker Products develops engine management and oxygen/air-fuel sensors as OE replacement parts for vehicle-specific applications. Part number 350-341118 is designed for downstream and upstream positions where listed, including Mazda MX-5 Miata downstream applications and Mazda CX-3 upstream coverage. For drivers searching for a Mazda MX-5 Miata downstream oxygen sensor or a Mazda CX-3 upstream O2 sensor, this part number 350-341118 provides the correct fitment format and sensor style for the specified vehicles.
This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.
What It Helps Address
- Check engine light related to oxygen sensor performance
- Poor fuel economy caused by incorrect exhaust feedback
- Rough engine operation from inaccurate air-fuel monitoring
- Elevated exhaust emissions from a failing sensor
- Stored ECU fault codes tied to the affected sensor circuit
Installation Notes and Tips
Verify the sensor position before ordering, since fitment varies by year, model, and location. Confirm the connector shape, wire count, thread size, and harness length against the original sensor on the vehicle. Inspect the sensor wiring, connector, and nearby harness for heat damage or physical wear before installation, as those issues can shorten sensor life and affect ECU feedback.
- Fits 2022-2025 Mazda MX-5 Miata, downstream
- Fits 2023 Mazda 2, N/A
- Fits 2023 Mazda CX-3, N/A
- Fits 2023 Mazda MX-5, N/A
- Fits 2020-2022 Mazda 2, downstream
- Fits 2022 Mazda CX-3, upstream
- Fits 2019-2022 Mazda MX-5, downstream
- Fits 2019-2021 Mazda CX-3, downstream; B1S2
- Fits 2019-2021 Mazda MX-5 Miata, downstream; B1S2
Quality Assurance
Walker Products has supplied engine management and fuel system components since 1946 and operates as an ISO 9001 / TS 16949 certified company. The OE Replacement line is built around application-specific fitment and diagnostic feedback requirements for modern ECU-controlled vehicles.
