Bosch 15578 Oxygen Sensor - Upstream, Upstream Rear or Upstream Right

Reliable Oxygen Sensor for Mitsubishi Eclipse and Endeavor

The Bosch Validated Oxygen Sensor part number 15578 is designed specifically for Mitsubishi Eclipse and Endeavor models. This narrow-band heated oxygen sensor ensures accurate air-fuel mixture readings to support optimal engine performance and emissions control.

• Specific fit for Mitsubishi Eclipse and Endeavor vehicles
• Narrow-band heated oxygen sensor with threaded mounting
• 25-inch wiring harness with 4-wire blade terminals and square male connector
• Durable metal housing with 22 mm hex size and 18 mm thread diameter
• Standard replacement grade with included wiring harness

About the Bosch Validated Oxygen Sensor Line

The Bosch Validated Oxygen Sensor line offers sensors that meet strict quality and performance standards to ensure compatibility and reliability. This product line focuses on providing specific fit sensors that maintain factory specifications, making the Bosch Validated Oxygen Sensor 15578 a dependable choice for emission control in Mitsubishi Eclipse and Endeavor models.

Product Features and Specifications

This oxygen sensor features a narrow-band heated design, which allows for faster sensor response and improved fuel efficiency. The sensor includes a 25-inch wiring harness with four wires and blade-type terminals, connected via a square-shaped male connector. The sensor mounts using a threaded 18 mm diameter fitting and has a 22 mm hex size for installation. Constructed with a metal housing finished in steel, it weighs approximately 0.198 pounds and measures 28.7 inches overall length, with 27.6 inches from sealing surface to connector end.

Common Applications and Issues Addressed

• Helps maintain proper air-fuel ratio for Mitsubishi Eclipse and Endeavor engines
• Reduces emissions by providing accurate oxygen level data to the engine control unit
• Resolves check engine light triggers related to oxygen sensor faults
• Improves fuel economy by optimizing combustion efficiency
• Prevents rough idling and engine performance issues caused by faulty sensors

Installation Notes and Tips

Installation requires a 22 mm wrench or socket to remove and install the sensor. Ensure the threaded mounting hole is clean before installation to avoid cross-threading. The included wiring harness simplifies connection, but verify the square male connector aligns properly with the vehicle’s harness. No mounting bracket is included, so use the existing sensor mounting location on the exhaust manifold or pipe. This sensor is a direct replacement designed for specific Mitsubishi Eclipse and Endeavor models, so no modifications are necessary.

Quality Assurance and Warranty

The Bosch Validated Oxygen Sensor 15578 is manufactured to meet OEM standards for fit, form, and function. Bosch’s quality control ensures consistent sensor performance and durability. While specific warranty details are not provided here, Bosch typically offers limited warranties on their oxygen sensors covering defects in materials and workmanship.