Bosch 15190 Oxygen Sensor - Downstream

Bosch Validated Oxygen Sensor for Mitsubishi Eclipse

Bosch 15190 is a narrow-band heated oxygen sensor built for specific downstream applications on the Mitsubishi Eclipse. It provides the ECU with air-fuel-ratio feedback for stable closed-loop control, accurate combustion management, and lower emissions.

As part of the Bosch Validated Oxygen Sensor line, this replacement sensor reflects Bosch’s OE development background and uses a threaded metal housing, square connector, and integrated wiring harness for a direct-fit service part.

Key Features

• Specific-fit Bosch oxygen sensor for downstream placement
• Narrow-band heated design for faster closed-loop operation
• Threaded 18 mm mounting with 22 mm hex size
• 4-wire, blade-terminal construction with square male connector
• Integrated wiring harness with 31.1 in harness length
• Standard replacement grade for emission control service
• Metal housing built for high-temperature and vibration exposure

Detailed Description

Bosch part number 15190 is engineered as a switching-type oxygen sensor that monitors exhaust oxygen content and sends precise feedback to the engine control unit. That signal helps the ECU maintain the correct air-fuel ratio during closed-loop operation, which supports smoother combustion and emissions control. Bosch’s oxygen sensor development includes early thimble-style designs and later planar narrowband technology, and this sensor reflects that OE-focused engineering approach.

Compatible With 2006 Mitsubishi Eclipse, downstream; 2007-2010 Mitsubishi Eclipse, downstream; and 2011-2012 Mitsubishi Eclipse, downstream. Fitment notes specify cylinder(s) 1 and 2 for 2006, 2011-2012, and cylinder(s) 3 and 4 for 2007-2010. Bosch 15190 is also a direct reference point for Mitsubishi Eclipse oxygen sensor replacement searches.

This part cross-references 1588A049 for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio feedback to the ECU
• Rough idle or inconsistent closed-loop fuel control
• Higher exhaust emissions from a worn downstream sensor
• Slow sensor response caused by age, heat, or contamination

Installation Notes and Tips

Verify downstream location and cylinder-specific fitment before installation on the Mitsubishi Eclipse. The sensor uses an 18 mm thread and a threaded mounting style, so the exhaust bung threads should be clean and undamaged before tightening. Confirm connector shape, terminal count, and harness routing against the original sensor to avoid strain on the wiring.

Because this is a heated narrow-band oxygen sensor, proper connector engagement and secure harness placement are important for stable signal output. Bosch 15190 should be installed on the correct downstream position listed for the vehicle application.

Quality Assurance

Bosch backs this oxygen sensor with more than five decades of OE development experience. The Validated Oxygen Sensor line is built to deliver OE-proven fit, signal accuracy, and durability for emission control service on Mitsubishi Eclipse applications.