Walker 250-24728 Oxygen Sensor

Walker OE Oxygen Sensor for GM Applications

Walker Products OE oxygen sensor Part Number 250-24728 is a heated, specific-fit replacement built for downstream monitoring on select Cadillac, Chevrolet, GMC, Hummer, Pontiac, and Saturn vehicles. It is engineered to deliver the ECU feedback needed for accurate fuel control and emissions monitoring.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for the listed downstream positions
• 4-wire configuration with 20-gauge wiring
• Threaded mounting with 18.0 mm thread diameter
• Radiused polygon male connector for application-specific connection
• Wiring harness length: 24.13 in.; overall length: 27.68 in.
• Walker Products OE line replacement for emission control service

Detailed Description

Walker Products OE 250-24728 is an oxygen sensor designed for downstream placement where the engine control unit relies on exhaust feedback to monitor catalyst efficiency and fuel trim behavior. As part of the Walker Products OE line, this sensor is built as an original-equipment-style replacement with application-specific fitment, connector shape, and mounting details matched to the vehicle position. It is a direct service part for vehicles such as the Cadillac CTS, Chevrolet Malibu, and GMC Sierra 3500 HD, with coverage across multiple downstream left, right, rear, and front locations.

This part number 250-24728 is used on select 2006-2015 GM platforms, including Cadillac CTS, Cadillac STS, Chevrolet Malibu, Chevrolet Silverado 3500 HD, GMC Sierra 3500 HD, Hummer H2, Pontiac G6, and Saturn Aura. This part cross-references Bosch 15717 for the same application.

What It Helps Address

• Stored oxygen sensor fault codes in the ECU
• Illuminated malfunction indicator light related to exhaust feedback
• Rough engine operation caused by inaccurate sensor data
• Increased fuel consumption from incorrect air-fuel correction
• Elevated exhaust emissions from degraded sensor performance

Installation Notes and Tips

Confirm the exact downstream position before ordering, since this sensor is listed for downstream left, downstream right, downstream rear, and downstream front applications depending on vehicle. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before installation. Verify thread size and connector orientation against the original part to ensure proper routing and secure threaded mounting.

Quality Assurance

Walker Products states that its engine management and oxygen/air-fuel sensors are developed as OE replacement parts and manufactured under Automotive ISO 9001/TS 16949 certification. The Walker Products OE line is supported by the company’s long-running focus on engine management and fuel system components.