Walker 350-34325 Oxygen Sensor - Upstream

Walker 350-34325 Oxygen Sensor for Ferrari

Walker Products 350-34325 is a heated oxygen sensor built as a specific-fit OE replacement for select Ferrari applications. It is engineered to provide the ECU with the diagnostic feedback needed for proper fuel control and emissions monitoring.

Key Features

• Heated oxygen sensor for faster operating response
• Specific fitment for the listed Ferrari applications
• Threaded mounting type with 18.0 mm thread diameter
• 33.58 in. wiring harness length and 20-gauge wire
• Radiused polygon connector design with female and male connector ends
• Overall length: 37.13 in.

Product Details

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors developed as OE-style replacements for worldwide vehicle coverage. Part number 350-34325 is built for the upstream position on select Ferrari 348 TB, Ferrari 348 GTB, and Ferrari Mondial t models, including 1990-1994 applications listed below. For Ferrari 348 GTB and Ferrari Mondial t service, this sensor supports the ECU’s ability to monitor exhaust oxygen content and maintain correct air-fuel feedback.

This part number, 350-34325, is a direct-fit oxygen sensor for the specified upstream location and is intended for vehicles that require a threaded, heated sensor with the listed connector and harness configuration. If the original sensor has failed, the vehicle may show poor running behavior, higher fuel use, increased emissions, or a malfunction indicator light.

What It Helps Address

• Check engine or malfunction indicator light related to oxygen sensor faults
• Rough engine operation caused by inaccurate exhaust feedback
• Increased fuel consumption from incorrect air-fuel correction
• Elevated exhaust emissions from a degraded upstream sensor
• Stored ECU fault codes tied to the affected sensor circuit

Installation Notes

Install in the upstream oxygen sensor position only for the listed vehicles. Before replacement, inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion, since physical damage can shorten sensor life and affect signal quality. Verify thread size, connector shape, and harness length against the original part before installation.

Compatible With: Fits 1993-1994 Ferrari 348 GTB, Upstream; Fits 1992-1993 Ferrari Mondial t, Upstream; Fits 1990 Ferrari Mondial t, Upstream; Fits 1990-1992 Ferrari 348 TB, Upstream. Walker 350-34325 is also a relevant search term for Ferrari 348 TB and Ferrari Mondial t upstream oxygen sensor replacement.

Quality Assurance

Walker Products has manufactured engine management and fuel system components since 1946 and operates as an Automotive ISO9001/TS 16949 certified company. The Walker Products Aftermarket line is built around application-specific replacement parts for modern diagnostic systems, including oxygen sensors that provide the ECU with the feedback required for proper operation.