Walker 250-22006 Oxygen Sensor - Upstream

Walker OE Oxygen Sensor for Mazda MPV

Walker Products OE 250-22006 is a specific-fit oxygen sensor built for upstream applications on select Mazda MPV models. It uses a 2-wire, non-heated design with a threaded mount and a radiused polygon male connector for direct replacement in the correct sensor location.

For 1989-1994 Mazda MPV vehicles, this oxygen sensor helps the ECU monitor exhaust oxygen content so the engine management system can maintain proper fuel control. Walker Products OE focuses on application-specific fitment, making 250-22006 a practical choice when replacing a failed upstream sensor on the Mazda MPV.

Key Features

• Specific-fit oxygen sensor for upstream placement
• Fits 1989-1994 Mazda MPV, upstream
• Non-heated sensor design
• 2-wire configuration with 20-gauge wiring
• 41.26-inch wiring harness length
• 18.0 mm thread diameter with threaded mounting type
• Radiused polygon male connector
• Overall length: 44.8

Detailed Description

Walker Products OE 250-22006 is engineered as an OE-style replacement oxygen sensor for the upstream position on Mazda MPV applications from 1989 through 1994. The sensor is built to provide the diagnostic feedback the ECU relies on for fuel mixture control, helping the vehicle respond accurately to exhaust conditions. This part number is listed for Mazda MPV upstream use and is identified for Bank 1 Sensor 1 needs on supported applications.

Walker Products OE is the brand line used for application-specific engine management sensors and related components. The line is focused on direct-fit replacement parts that match the intended vehicle position and connector style, which is important when replacing an oxygen sensor on a Mazda MPV or other supported vehicle.

This part cross-references no additional part numbers in the provided data.

What It Helps Address

• Check engine light related to upstream oxygen sensor faults
• Poor fuel economy caused by incorrect air-fuel feedback
• Rough engine operation from inaccurate exhaust oxygen readings
• Higher exhaust emissions from a failing sensor
• Stored ECU fault codes tied to the oxygen sensor circuit

Installation Notes and Tips

Confirm the upstream sensor location before ordering, since this part is specific to the intended position. Inspect the sensor wiring harness and connector for damage during replacement, and verify the threaded mounting point and connector style match the original unit on the Mazda MPV.

Before installation, check for exhaust leaks and related wiring issues that can affect sensor performance. On 1989-1994 Mazda MPV applications, use the vehicle’s diagnostic information to confirm the fault is related to the upstream oxygen sensor circuit.

Quality Assurance

Walker Products has produced engine management and oxygen sensor components since 1946 and operates as an ISO 9001/TS 16949 certified company. The 250-22006 is built as an OE replacement for the specified application and position.