Bosch 13412 Oxygen Sensor

Bosch Oxygen Sensor for Mitsubishi and Chrysler

Bosch Part Number 13412 is a narrow-band heated oxygen sensor built for specific downstream and upstream-left applications across Mitsubishi, Chrysler, and Dodge vehicles. It delivers air-fuel-ratio feedback to the ECU for stable closed-loop control, accurate combustion management, and lower emissions.

The Bosch Engineered Oxygen Sensor line draws on Bosch OE development, including the original thimble sensor design and later planar narrowband technology for faster light-off and quicker closed-loop response. Bosch 13412 uses a threaded metal housing, 4-wire blade terminals, and an included wiring harness for direct replacement service.

Key Features

• Specific-fit oxygen sensor for targeted vehicle applications
• Narrow-band heated design for precise ECU feedback
• 4-wire configuration with male square connector and blade terminals
• Threaded mounting with 18 mm thread size and 22 mm hex size
• Wiring harness included for service replacement
• Steel finish with metal housing for high-temperature durability
• Overall length: 31.1 in; harness length: 27.8 in

Product Details

Bosch 13412 is engineered as a standard replacement oxygen sensor for emissions and drivability service. It is used in downstream and upstream-left positions on select Mitsubishi Eclipse, Galant, Montero, and Montero Sport models, as well as Chrysler Sebring and Dodge Stratus applications. This part cross-references Mitsubishi OE numbers such as MD312084 and MD360181 for the same application.

Compatible With 2004-2005 Mitsubishi Eclipse, downstream left or downstream right; 2001-2003 Mitsubishi Galant, downstream; 2001-2006 Mitsubishi Montero, downstream right; 2001-2003 Mitsubishi Montero Sport, upstream left; 2004-2005 Chrysler Sebring, downstream left or downstream right; and 2004-2005 Dodge Stratus, downstream left or downstream right. It also covers additional Mitsubishi fitments including 1995-2000 Montero, 1997-2000 Montero Sport, 1997 Montero, 1999-2000 Galant, and 2000 Eclipse with California emissions coverage where listed.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Rich or lean fuel trim readings from a worn sensor
• Slow closed-loop response during warm-up and cruise operation
• Emissions test failures tied to inaccurate exhaust feedback
• Rough idle or inconsistent fuel control caused by sensor aging

Installation Notes and Tips

Verify the connector shape, wire count, thread size, and sensor position before installation. Bosch 13412 is a specific-fit threaded sensor, so confirm downstream or upstream-left placement on the vehicle and match the harness routing to the original layout. Use proper oxygen sensor service tools and inspect the exhaust bung threads before tightening.

Quality Assurance

Bosch backs this oxygen sensor with more than five decades of OE development in emissions sensing. The design uses advanced ceramic elements, optimized heater control, and high-temperature-resistant materials to support consistent operation under thermal and vibration load.