Bosch 13812 Oxygen Sensor - Upstream, Upstream Left or Upstream Right

Bosch Oxygen Sensor for Stealth and 3000GT

Bosch 13812 is a narrow-band heated oxygen sensor built for specific-fit applications on select Dodge Stealth and Mitsubishi 3000GT models. It provides the ECU with air-fuel-ratio feedback for stable closed-loop fuel control and lower emissions across changing operating conditions.

Key Features

• Specific-fit Bosch Engineered Oxygen Sensor for direct application matching
• Narrow-band heated oxygen sensor with 4-wire configuration
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Square male connector with blade terminals
• Wiring harness included for the listed application
• Metal housing and high-temperature-resistant construction for demanding exhaust conditions
• Bosch 13812 is part of Bosch’s OE-focused oxygen sensor line

Product Details

Bosch 13812 uses a switching-type narrow-band design to report exhaust oxygen content to the engine control unit, helping maintain accurate fuel delivery during warm-up and normal driving. Bosch developed this sensor line from its long-running OE oxygen sensor engineering, including faster light-off and quicker closed-loop response in later planar designs. For drivers servicing a Dodge Stealth or Mitsubishi 3000GT, Bosch 13812 offers a direct replacement format that matches the listed connector, wiring, and threaded mounting specifications.

This part cross-references Mitsubishi MD165083 and MD186990 for the same application.

Vehicle Fitment

• Fits 1994-1995 Dodge Stealth, upstream, without California Emission System.
• Fits 1994 Dodge Stealth, upstream left.
• Fits 1994 Dodge Stealth, upstream right, without California Emission System.
• Fits 1991-1993 Dodge Stealth, upstream.
• Fits 1994-1995 Mitsubishi 3000GT, upstream, without California Emission System.
• Fits 1991-1993 Mitsubishi 3000GT, upstream.

Installation Notes

Verify the sensor position, connector shape, wire count, and emission-system notes before installation. This Bosch 13812 oxygen sensor uses a threaded 18 mm mount and a 4-wire heated design, so the replacement should match the vehicle’s upstream location and connector style exactly. Inspect the exhaust bung threads and wiring routing before tightening the sensor into place.

Quality Assurance

Bosch backs this oxygen sensor with more than five decades of OE development in emissions sensing. The design reflects Bosch’s focus on accurate lambda measurement, durable heater control, and stable performance under heat and vibration.