Denso 234-4195 Oxygen Sensor - Downstream or Downstream Left

Overview of the Denso OE Style Oxygen Sensor 234-4195

The Denso OE Style Oxygen Sensor 234-4195 is designed specifically for select Subaru models, including the Forester, Impreza, Legacy, Outback, and WRX. This heated oxygen sensor features a threaded mounting type and a 14.88-inch wiring harness, ensuring precise fitment and reliable performance.

• Heated oxygen sensor for accurate emissions monitoring
• Specific fit for Subaru Forester, Impreza, Legacy, Outback, and WRX
• 14.88-inch wiring harness length for optimal installation
• Threaded mounting with 0.708-inch thread diameter
• Four-wire design with male connector for secure connection

Detailed Features and Specifications

This Denso oxygen sensor (part number 234-4195) is engineered with a heated sensor element to provide faster response times and improved fuel efficiency. The four-wire configuration supports both the sensor signal and heater circuit, which helps maintain accurate oxygen level readings under various operating conditions. The 0.708-inch threaded mounting ensures a secure and leak-free installation in the exhaust system. With a wiring harness length of 14.88 inches, this sensor offers sufficient reach for proper connection without excess slack.

About the Denso OE Style Product Line

The OE Style line from Denso focuses on delivering replacement parts that closely match original equipment specifications. This oxygen sensor maintains the same fit, form, and function as the factory-installed component, making it a reliable choice for Subaru owners seeking a direct replacement. The OE Style designation indicates that this sensor meets the quality and performance standards expected from original parts.

Common Applications and Problem Resolution

• Restores proper air-fuel mixture readings for Subaru Forester, Impreza, Legacy, Outback, and WRX
• Resolves check engine light issues related to oxygen sensor faults
• Improves fuel economy by providing accurate emissions data
• Helps reduce harmful exhaust emissions
• Prevents rough idling and engine performance problems caused by faulty sensors

Installation Notes and Tips

When installing the Denso 234-4195 oxygen sensor, ensure the engine and exhaust system are cool to avoid burns. Use an oxygen sensor socket or appropriate tool to remove the old sensor carefully. Verify the wiring harness length and connector gender match the vehicle’s factory setup before installation. Thread the sensor by hand initially to prevent cross-threading, then tighten to the manufacturer’s torque specifications.

Quality Assurance and Warranty

Denso oxygen sensors are manufactured to meet strict quality standards and undergo rigorous testing to ensure durability and performance. The OE Style 234-4195 sensor is designed to provide consistent operation throughout its service life. Warranty coverage details should be confirmed with the point of purchase or manufacturer documentation.