Bosch 18142 Oxygen Sensor - Downstream

Bosch Validated Oxygen Sensor 18142

Bosch 18142 is a specific-fit, narrow-band heated oxygen sensor built for downstream applications where accurate air-fuel feedback matters. It uses a threaded mounting design, a 4-wire harness, and a rectangular male connector for direct replacement service on select Nissan and INFINITI vehicles.

Key Features

• Specific-fit Bosch Validated Oxygen Sensor for direct replacement use
• Narrow-band heated oxygen sensor with optimized heater control
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• 4-wire design with blade terminals and rectangular male connector
• Wiring harness included with an 8 in harness length and 11.4 in overall length
• Steel finish, metal housing, standard replacement grade

Product Details

Bosch 18142 is part of the Bosch Validated Oxygen Sensor line, which reflects Bosch’s OE-focused oxygen sensor development for aftermarket replacement. Bosch has refined switching-type O2 sensor technology from early thimble designs to planar narrowband construction, improving response time, lambda accuracy, and closed-loop operation. This sensor is engineered to provide precise exhaust feedback to the ECU so the engine can maintain stable combustion control and emissions performance under changing operating conditions. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Compatible With select downstream applications including 2020 Nissan Rogue, 2013-2019 Nissan Frontier, 2014-2019 Nissan Rogue, 2014-2017 INFINITI QX60, 2016 Nissan Murano, 2014-2015 Nissan Pathfinder, and 2013-2015 Nissan Xterra. Use Bosch 18142 when replacing a downstream narrow-band heated oxygen sensor on these vehicles.

What It Helps Address

• Check engine light concerns related to oxygen sensor performance
• Unstable air-fuel ratio feedback to the ECU
• Delayed closed-loop fuel control after sensor warm-up
• Emissions-related drivability issues from a worn downstream sensor
• Incorrect exhaust oxygen readings on select Nissan and INFINITI models

Installation Notes

Confirm the downstream position, connector shape, wire count, and thread size before installation. This sensor uses a threaded mount with an 18 mm thread diameter and a 22 mm hex size, so the correct oxygen sensor socket or wrench is recommended. Verify harness routing and connector orientation against the original part to avoid strain on the wiring.

Quality Assurance

Bosch backs this oxygen sensor with more than five decades of OE development and validation. The sensor uses high-temperature-resistant materials, ceramic elements, and heater control strategies intended to maintain consistent operation in demanding thermal and vibration conditions.