Walker 250-241301 Oxygen Sensor - Downstream

Walker OE Base Oxygen Sensor 250-241301

Walker OE Base Sensor 250-241301 is a narrow-band oxygen sensor built for engine management feedback in emission control systems. It is a heated, 4-wire replacement sensor with an M18 x 1.5 thread, blade terminals, and an oblong male connector for application-specific OE-style fitment.

The OE Base Sensor line from Walker Products focuses on direct replacement oxygen and air-fuel sensors for specific vehicle applications. For drivers diagnosing a check engine light, poor fuel economy, rough running, or elevated exhaust emissions, the sensor signal is a key input the ECU uses to adjust fuel control.

Key Features

• Part number 250-241301 for OE-style oxygen sensor replacement
• Heated narrow-band sensor for closed-loop engine management feedback
• 4-wire design with blade terminals and 4 terminal positions
• Oblong male connector for application-specific electrical connection
• M18 x 1.5 thread size for direct-thread mounting where specified
• Walker OE Base Sensor line engineered for vehicle-specific fitment and ECU feedback

Detailed Description

Walker Products 250-241301 is an oxygen sensor intended for emission control and fuel-trim monitoring on vehicles that use a narrow-band sensor strategy. It is built to match the required application, fitment position, and diagnostic feedback expected by the ECU. If you are servicing a Honda Civic, Toyota Corolla, or similar vehicle that uses this sensor configuration, this part number 250-241301 provides the OE-style replacement format needed for accurate exhaust oxygen reporting.

This sensor is part of Walker’s OE Base Sensor line, which is focused on direct replacement engine management sensors for specific vehicle applications. The heated design helps the sensor reach operating temperature faster, supporting stable signal output once the engine is running. This makes it a practical choice when replacing a worn oxygen sensor that has triggered fault codes or affected drivability.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Rough idle or poor engine operation caused by incorrect air-fuel feedback
• Increased fuel consumption from inaccurate ECU fuel control
• Higher exhaust emissions from a degraded sensor signal
• Fault codes tied to the affected sensor circuit or related systems

Installation Notes and Tips

Confirm the connector shape, terminal count, wire count, and thread size before installation. Inspect the sensor wiring harness and connector for heat damage, corrosion, or physical wear, since damaged wiring can shorten sensor life and affect signal quality. Verify the sensor position on the vehicle matches the required application before replacement.

For Honda Civic and Toyota Corolla service work, confirm the exact engine and sensor location against the vehicle’s original configuration before ordering or installing part number 250-241301.

Quality Assurance

Walker Products has manufactured engine management and fuel system components since 1946 and operates as an ISO 9001/TS 16949 certified company. The OE Base Sensor line is built around application-specific replacement requirements for consistent ECU feedback and dependable emission control service.