Bosch 16606 Oxygen Sensor - Upstream, Upstream Left or Upstream Right

Overview

Bosch Oxygen Sensor 16606 is a specific-fit, heated sensor built for precise air-fuel-ratio feedback to the ECU. It supports stable combustion control and emissions management across a wide range of operating conditions.

Compatible With Toyota Camry, Toyota Tacoma, Lexus ES350, and other listed applications, this Bosch Validated Oxygen Sensor is a standard replacement part for upstream locations. Part number 16606 is also referenced for OE-style applications that require accurate closed-loop operation.

Key Features

• Heated oxygen sensor design for faster closed-loop response
• Specific-fit construction with a threaded mounting type
• 4-wire layout with blade terminals and rectangular connector
• Metal housing with high-temperature-resistant materials
• Bosch Validated Oxygen Sensor line backed by OE development experience

Detailed Description

Bosch 16606 uses advanced ceramic elements and optimized heater control to deliver consistent signal quality under thermal and vibration stress. The narrow-band sensor design is intended for accurate lambda feedback, while the heated configuration helps the system reach operating temperature more quickly. This makes it a practical choice for Toyota Camry, Toyota Tacoma, and Lexus ES350 applications that call for dependable upstream oxygen sensor performance.

This part cross-references Toyota OE numbers 894670E270 and 8946704120 for the same application.

What It Helps Address

• Check engine lights related to oxygen sensor performance
• Unstable air-fuel mixture feedback to the ECU
• Delayed closed-loop operation after startup
• Emissions-related faults tied to upstream sensor readings
• Rough combustion control caused by inaccurate lambda data

Installation Notes

Fits 2019-2025 Lexus ES350, upstream left; 2018-2024 Toyota Camry, upstream left; 2021-2023 Toyota Tacoma, upstream left; 2019-2022 Toyota Avalon, upstream left; 2021-2022 Toyota C-HR, upstream; 2021-2022 Toyota Corolla, upstream; 2020-2022 Toyota Highlander, upstream right; 2018-2020 Toyota C-HR, upstream; 2016-2020 Toyota Tacoma, upstream left; 2016-2020 Toyota Tacoma, upstream right; 2017-2018 Toyota Corolla iM, upstream; 2016 Scion iM, upstream.

Verify connector shape, thread size, and sensor location before installation. This Bosch oxygen sensor includes a wiring harness and uses an 18 mm thread diameter with a 22 mm hex size.

Quality Assurance

Bosch draws on more than five decades of OE sensor development, and the Validated Oxygen Sensor line reflects that engineering background. Part number 16606 is built for durable, accurate operation in aftermarket service.