Bosch 18201 Oxygen Sensor - Upstream Right

Bosch Wideband Oxygen Sensor for Honda

Bosch Validated Oxygen Sensor 18201 is a specific-fit wideband A/F oxygen sensor for select Honda applications. It delivers continuous air-fuel ratio measurement across the full lambda range, giving the engine control unit detailed feedback for precise mixture control, stable drivability, and lower emissions.

Built with Bosch’s planar pump-cell wideband design, this sensor uses fast light-off, optimized heater control, and a robust ceramic element for dependable operation during rapid load changes and repeated thermal cycling. It is a direct replacement for upstream right locations on select Honda Odyssey, Passport, Ridgeline, and Pilot models.

Key Features

• Wideband A/F oxygen sensor for precise air-fuel ratio monitoring
• Specific-fit design with wiring harness included
• Heated sensor with optimized heater control for faster response
• 5-wire design with square connector and blade terminals
• Threaded mounting, 18 mm thread size, 22 mm hex size
• Metal housing with robust ceramic construction
• Overall length: 12.2 in; harness length: 8.7 in
• Bosch Validated Oxygen Sensor line for OE-style replacement applications

Detailed Description

Bosch 18201 is engineered for vehicles that rely on wideband feedback to manage fuel delivery and emissions control. Unlike a traditional switching sensor, this wideband oxygen sensor provides continuous measurement across the full lambda range, helping the ECU maintain accurate control under idle, cruise, acceleration, and load changes. Bosch’s long OE development history and planar pump-cell technology are reflected in the sensor’s fast response and durable construction.

This part cross-references Monroe Shocks & Struts (e.g., 365415MRA01) for the same application. It is a direct-fit replacement for select Honda Odyssey, Honda Passport, Honda Ridgeline, and Honda Pilot upstream right positions, including Fits 2021-2025 Honda Odyssey, Upstream Right; Fits 2021-2025 Honda Passport, Upstream Right; Fits 2021-2025 Honda Ridgeline, Upstream Right; and Fits 2020-2022 Honda Pilot, Upstream Right.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio readings from a worn wideband sensor
• Rough idle, hesitation, or inconsistent throttle response
• Reduced fuel economy caused by inaccurate mixture feedback
• Elevated emissions from poor upstream sensor control

Installation Notes

Verify the upstream right location, connector shape, terminal count, and thread size before installation. This sensor uses a threaded mount with an 18 mm thread diameter and includes the wiring harness. Confirm harness routing and connector orientation on the Honda Odyssey, Passport, Ridgeline, or Pilot before final fitment.

For best results, inspect the exhaust bung threads and surrounding wiring for heat damage or corrosion before installing Bosch Validated Oxygen Sensor 18201. Proper fitment is especially important on wideband sensors because the ECU depends on accurate signal response for fuel control.

Quality Assurance

Bosch supplies this oxygen sensor as part of its OE-focused aftermarket lineup, drawing on more than five decades of engine management development. The Bosch Validated Oxygen Sensor line is built to the same functional standards expected in modern Honda emissions systems, with attention to response speed, heater control, and long-term durability.