Walker 350-34647 Oxygen Sensor - Downstream

Walker 350-34647 Oxygen Sensor for Mercedes-Benz

Walker Products 350-34647 is a heated downstream oxygen sensor built as a specific-fit OE-style replacement for select Mercedes-Benz applications. It is engineered to provide the ECU with the feedback needed for proper emissions and fuel-control monitoring on the affected vehicle.

Compatible with 1994-1995 Mercedes-Benz S320, downstream, this Walker Products Aftermarket sensor is a direct-fit option for the listed application. The Walker Products engine management line focuses on application-specific sensor fitment, connector style, and signal output for modern diagnostic systems.

Key Features

• Part number: 350-34647
• Heated oxygen sensor design for faster operating response
• Specific fit for the listed Mercedes-Benz S320 downstream location
• 4-wire configuration with 20-gauge wiring
• Female connector with radiused polygon shape
• Threaded mounting design with 18.0 mm thread diameter
• Overall length: 18.62 in; wiring harness length: 15.08 in

Detailed Description

This Walker oxygen sensor is intended for downstream installation on 1994-1995 Mercedes-Benz S320 models. As an emissions control sensor, it monitors exhaust conditions and sends feedback to the ECU so the vehicle can manage fuel delivery and emissions strategy correctly. The specific-fit design helps match the original sensor location, connector style, and electrical configuration for the listed application. If you are replacing a failed downstream oxygen sensor on a Mercedes-Benz S320, part number 350-34647 provides a direct replacement reference for the exact vehicle fitment shown here.

Walker Products Aftermarket has supplied engine management and oxygen/air-fuel sensors for OE-style replacement use across many vehicle platforms. This part cross-references Bosch (e.g., 15733) for the same application.

What It Helps Address

• Check engine light related to downstream oxygen sensor performance
• Poor fuel economy caused by incorrect exhaust feedback
• Elevated exhaust emissions from a failing sensor
• Rough engine operation tied to faulty ECU sensor input
• Stored fault codes associated with the oxygen sensor circuit

Installation Notes

Verify the downstream sensor location before installation and compare the connector, thread diameter, and harness length to the removed part. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion, since physical damage can shorten service life and affect signal quality. Confirm the vehicle application by year, make, model, and position before ordering or installing Walker 350-34647.

Quality Assurance

Walker Products is an ISO 9001/TS 16949 certified manufacturer with a long history in engine management and fuel system components. The 350-34647 is built as an application-specific replacement sensor for the listed Mercedes-Benz S320 fitment.