Walker 250-241287 Oxygen Sensor - Downstream

Walker OE Base Oxygen Sensor

Walker OE Base Sensor 250-241287 is a specific-fit downstream oxygen sensor for select Jeep Renegade and Fiat 500X applications. It is built as an OE-style replacement with the correct connector, thread, and sensor configuration for the listed vehicles.

The Walker OE Base Sensor line focuses on application-specific engine management sensors that match the vehicle’s required diagnostic feedback. For a downstream oxygen sensor replacement on a 2019-2021 Jeep Renegade or 2019-2020 Fiat 500X, this part number 250-241287 provides the narrow-band signal format and heated design used by the ECU on the covered applications.

Key Features

• Specific-fit downstream oxygen sensor for listed applications
• Heated narrow-band sensor design
• 4-wire configuration with 4 terminals
• Oblong female connector with male terminals
• M18 x 1.5 thread size and 22 mm wrench size
• Walker OE Base Sensor line for OE-style replacement needs

Detailed Description

Walker 250-241287 is an emission control oxygen sensor engineered for direct replacement in the specified downstream position. It is listed for 2019-2021 Jeep Renegade, B1S2, and 2019-2020 Fiat 500X, B1S2. The sensor uses a heated narrow-band design to deliver the feedback expected by the engine control unit on these applications. If you are replacing a downstream oxygen sensor on a Jeep Renegade or Fiat 500X, this part number 250-241287 is matched to the original fitment position and connector style.

Walker Products has long focused on engine management and oxygen/air-fuel sensors for OE replacement applications. The OE Base Sensor line is built around vehicle-specific fitment so the sensor, connector, and thread specification align with the original equipment setup.

Common Issues This Sensor May Address

• Check engine light related to downstream oxygen sensor performance
• Poor fuel economy caused by inaccurate exhaust feedback
• Elevated exhaust emissions from a failing sensor
• Rough engine operation tied to sensor signal faults
• Stored ECU fault codes for the affected sensor circuit

Installation Notes and Tips

Before replacement, inspect the sensor wiring harness and connector for heat damage, corrosion, or broken terminals. Confirm the downstream B1S2 location on the vehicle before installation, and verify the M18 x 1.5 thread and 22 mm wrench size match the original sensor. After installation, clear any stored fault codes and confirm the ECU reads the new sensor correctly.

Quality Assurance

Walker Products manufactures engine management sensors for specific vehicle applications and supports them with ISO 9001/TS 16949 quality systems. This part is part of the Walker OE Base Sensor line, which is built for OE-style replacement fitment and diagnostic performance on the listed Jeep Renegade and Fiat 500X applications.