Bosch 16625 Oxygen Sensor - Upstream Front or Upstream Left

OE Quality Wideband Sensor

Bosch oxygen sensor 16625 is a specific-fit wideband air-fuel sensor built for precise mixture feedback and stable engine management. It is engineered for upstream left applications on a wide range of Acura and Honda models, including the Acura MDX and Honda Pilot.

• Wideband air-fuel sensing for continuous, high-precision measurement.
• Heated design with optimized heater control for faster response.
• Robust ceramic construction for reliable operation through thermal cycling.
• Specific-fit design with a threaded mounting style and square connector.
• OE Quality Oxygen Sensor line from Bosch, backed by extensive OE development.

Detailed Product Information

This Bosch 16625 oxygen sensor uses a wideband design to provide the ECU with more detailed air-fuel ratio data than a traditional switching sensor. That level of feedback supports accurate fuel control, cleaner emissions, and consistent performance during rapid load changes. The sensor features a 5-wire configuration, 6 terminals, a heated element, and a metal housing with an 18 mm thread size for a direct replacement application.

Bosch’s OE Quality Oxygen Sensor line reflects the company’s long history in engine management and emissions technology. The wideband architecture, fast light-off behavior, and durable construction make this part a practical choice for Acura MDX, Acura RLX, Acura TLX, Honda Pilot, and Honda Accord applications where precise upstream sensing is required. This part cross-references Bosch 16625 for the same application.

What It Helps Address

• Incorrect air-fuel ratio readings from a worn upstream sensor.
• Reduced fuel economy caused by inaccurate mixture control.
• Rough engine operation during load changes.
• Higher emissions from delayed or unstable sensor feedback.
• Check engine light conditions related to oxygen sensor performance.

Installation Notes and Quality

Fits 2008-2017 Honda Accord, Upstream Left; Fits 2009-2020 Honda Pilot, Upstream Left; Fits 2010-2020 Acura MDX, Upstream Left. Confirm connector shape, wire count, thread size, and mounting location before installation. Use the vehicle service information for proper sensor placement and torque specifications.

Bosch supplies OE-proven oxygen sensors developed from more than five decades of engine management experience. Part number 16625 is built as a standard replacement wideband sensor for specific-fit applications.

Part number 16625 is also listed for Acura RLX, Acura TLX, Honda Ridgeline, Acura RDX, Honda Odyssey, Honda Crosstour, Acura TL, Acura TSX, Acura ZDX, Acura RL, and Honda Accord Crosstour in the upstream left or upstream front positions as shown in the fitment data.