Walker 250-21009 Oxygen Sensor - Upstream, Upstream Front or Upstream Rear

Overview of Walker Products OE Oxygen Sensor 250-21009

The Walker Products OE 250-21009 oxygen sensor is designed for specific vehicle applications including Acura, Chevrolet, Geo, Honda, and Suzuki models. This non-heated oxygen sensor features a threaded mounting type and a radiused polygon male connector, ensuring precise fit and reliable performance for emission control systems.

• Wiring harness length: 16.46 inches
• Wire gauge measurement: 20 gauge
• Sensor type: Non heated
• Specific fit for select Acura, Chevrolet, Geo, Honda, and Suzuki models
• Connector shape: Radiused polygon with male gender
• Thread diameter: 18.0 mm
• Overall length: 20.0 inches
• Mounting type: Threaded
• Single wire configuration

Detailed Product Description

This oxygen sensor, part number 250-21009, is engineered to meet the exact specifications required by certain Acura, Chevrolet, Geo, Honda, and Suzuki vehicles such as the Accord, Civic, CRX, Integra, Legend, Prelude, Samurai, Sidekick, Sprint, and Tracker. The sensor’s non-heated design and 20 gauge wire ensure compatibility with the vehicle’s emission control system without the need for additional heating elements. The radiused polygon male connector and threaded mounting type provide a secure and precise installation, reducing the risk of leaks or sensor misalignment.

Walker Products OE is a product line focused on delivering original equipment quality parts that match or exceed factory specifications. This oxygen sensor is part of that line, offering a reliable replacement option that maintains the integrity of the vehicle’s emission system and supports proper engine management.

Common Applications and Issues Addressed

• Replacement for faulty or failing oxygen sensors in compatible Acura, Chevrolet, Geo, Honda, and Suzuki models
• Helps resolve engine performance issues related to incorrect air-fuel mixture readings
• Reduces emissions by providing accurate oxygen level data to the engine control unit
• Prevents check engine light triggers caused by sensor malfunctions
• Supports fuel efficiency by ensuring proper combustion monitoring

Installation Notes and Tips

• Ensure the vehicle is compatible with part number 250-21009 before installation
• Disconnect the battery and allow the engine to cool before removing the old sensor
• Use appropriate tools to avoid damaging the threaded mounting or connector
• Verify the wiring harness length and connector shape match the vehicle’s original sensor
• After installation, clear any diagnostic trouble codes and perform a test drive to confirm proper operation

Quality Assurance and Warranty

Walker Products OE oxygen sensors are manufactured to meet stringent quality standards, ensuring durability and reliable performance. This part undergoes rigorous testing to comply with original equipment specifications. Warranty details are provided by the manufacturer and typically cover defects in materials and workmanship under normal use conditions.