Bosch 16605 Oxygen Sensor - Upstream Left or Upstream Right

Bosch Validated Oxygen Sensor for Acura and Honda

Bosch Validated Oxygen Sensor 16605 is a specific-fit emission control sensor built for precise air-fuel-ratio feedback to the ECU. It supports stable combustion control and lower emissions in confirmed Acura RLX and Honda Accord applications, including upstream left and upstream right positions.

Key Features

• Bosch Validated Oxygen Sensor line with OE-focused validation
• Heated oxygen sensor design for faster closed-loop operation
• Wide band oxygen sensor construction with narrow-band sensor type listing
• Specific fit with threaded mounting and 18 mm thread size
• Blade terminals, 5-wire harness, and included wiring harness
• Rectangle connector, male connector gender, and male terminal gender
• Metal housing with high-temperature-resistant materials for harsh underhood conditions
• Overall length: 11.8 in; harness length: 8.3 in

Product Line Details

The Bosch Validated Oxygen Sensor line reflects Bosch’s long OE development history in oxygen sensing technology. Bosch pioneered early thimble-style sensors and later advanced planar narrowband designs to improve light-off speed, lambda accuracy, and closed-loop response. Bosch 16605 carries that OE-oriented approach into the aftermarket for direct replacement use.

Detailed Description

Bosch 16605 is an emission control oxygen sensor engineered for direct replacement in specific Acura and Honda applications. It measures exhaust oxygen content so the engine control unit can adjust fuel delivery accurately, helping maintain stable combustion across changing operating conditions. The sensor uses a heated design, ceramic sensing elements, optimized heater control, and durable materials to maintain consistent signal quality under thermal and vibration load. This part cross-references 365415G1A01 for the same application.

Compatible vehicle coverage includes Fits 2016-2020 Acura RLX, Upstream Left; Fits 2014 Acura RLX, Upstream Right; Fits 2013-2017 Honda Accord, Upstream Right, with California Emission System; and Fits 2008-2009 Honda Accord, Upstream Left. Bosch 16605 is a direct-fit option for buyers searching for an Acura RLX upstream oxygen sensor or a Honda Accord upstream oxygen sensor replacement.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio feedback to the ECU
• Rough idle or unstable combustion control caused by sensor degradation
• Delayed closed-loop operation after startup
• Elevated emissions from inaccurate exhaust oxygen readings

Installation Notes and Tips

Confirm the vehicle year, engine/emissions package, and sensor position before ordering. This Bosch oxygen 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 connector shape, wire count, and harness routing against the original part before installation. Because fitment is specific, match the upstream left or upstream right location exactly as listed for the vehicle.

Quality Assurance

Bosch backs this oxygen sensor with more than five decades of OE development experience in sensor technology. The design uses OE-proven materials and heater control strategies intended to deliver consistent signal accuracy and durability in demanding exhaust environments.