Bosch 15358 Oxygen Sensor - Downstream Left or Downstream Right

Bosch Oxygen Sensor for Mitsubishi Applications

The Bosch Engineered Oxygen Sensor, part number 15358, provides direct air-fuel ratio feedback to the ECU for stable combustion control and lower emissions. This narrow-band heated oxygen sensor is a specific-fit replacement for select Mitsubishi Montero and Mitsubishi Diamante applications, including downstream left and downstream right positions.

Key Features

• Bosch Engineered Oxygen Sensor, part number 15358
• Narrow-band heated oxygen sensor for closed-loop fuel control
• Specific fit with square connector, 4-wire design, and male blade terminals
• Threaded mounting with 18 mm thread size and 22 mm hex size
• Wiring harness included with 21.5 in harness length
• Metal housing built for high-temperature and vibration exposure
• Fits 2001-2006 Mitsubishi Montero, downstream left
• Fits 2001-2004 Mitsubishi Diamante, downstream right
• Fits 1999-2000 Mitsubishi Diamante, downstream right, with California Emission System

Product Details

Bosch Engineered Oxygen Sensor 15358 is built around Bosch’s long OE development history in oxygen sensing, including narrowband planar sensor technology that improves light-off response and closed-loop operation. The sensor uses a heated ceramic element and optimized heater control to deliver consistent signal output across changing exhaust temperatures. For Mitsubishi Montero and Mitsubishi Diamante vehicles, this Bosch oxygen sensor supports accurate downstream monitoring and helps the ECU maintain proper fuel mixture control.

This part cross-references Monroe Shocks & Struts (e.g., MD357286, MD369192) for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio readings at the ECU
• Rough idle caused by inaccurate downstream sensor feedback
• Elevated emissions from poor combustion control
• Slow sensor response during closed-loop operation

Installation Notes

Verify the connector shape, wire count, and threaded mounting location before installation. This Bosch 15358 oxygen sensor uses a 4-wire harness, male connector, and 18 mm thread size, so matching the original sensor configuration is important for proper installation. Confirm whether your vehicle requires the downstream left or downstream right position, and on 1999-2000 Mitsubishi Diamante applications, confirm California Emission System fitment.

Quality Assurance

Bosch supplies oxygen sensors with OE-level engineering and durable materials selected for heat and vibration resistance. The Bosch Engineered Oxygen Sensor line reflects Bosch’s long-standing development of switching-type and narrow-band oxygen sensor technology for aftermarket replacement use.