Bosch 16335 Oxygen Sensor - Downstream

Bosch OE Oxygen Sensor for Ford Downstream Use

Bosch 16335 is an Actual OE Oxygen Sensor built as a narrow-band heated replacement for downstream monitoring on select Ford applications. It delivers precise air-fuel-ratio feedback to the ECU, helping maintain stable combustion control and emissions performance in normal driving conditions.

Compatible With 2017-2019 Ford Escape, downstream and 2018-2021 Ford EcoSport, downstream. Bosch 16335 is a direct-fit sensor with the connector, harness, and threaded mounting style needed for the listed applications.

Key Features

• Actual OE Oxygen Sensor from Bosch
• Narrow-band heated sensor design
• Specific-fit replacement for listed Ford models
• 4-wire configuration with included wiring harness
• Oblong female connector with pin terminals
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Steel-finish metal housing for underbody service conditions

How Bosch Actual OE Sensors Work

Bosch has developed oxygen sensor technology since 1976, starting with the original thimble-style design and later advancing to planar narrowband sensors for faster light-off and quicker closed-loop operation. This Bosch 16335 sensor uses a ceramic sensing element and controlled heater circuit to provide consistent signal output under heat and vibration. For drivers searching for a downstream oxygen sensor for 2017-2019 Ford Escape or a replacement oxygen sensor for 2018-2021 Ford EcoSport, this part matches the OE-style layout used by the vehicle platform.

This part cross-references Ford OE numbers F1FZ9G444G and J1BZ9G444B for the same application.

Common Problems This Sensor Can Address

• Check engine light related to oxygen sensor performance
• Incorrect downstream O2 sensor signal readings
• Rough or unstable fuel control feedback to the ECU
• Emissions test failures tied to sensor response issues
• Corrosion or heat damage at the original sensor body or connector

Installation Notes

Verify the downstream location before installation and confirm the connector shape, wire count, and thread size match the original sensor. The sensor uses a threaded mount with an 18 mm thread size, so proper removal tools and anti-seize practices should follow the vehicle service procedure. Inspect the harness routing and connector lock before clearing diagnostic codes and completing a road test.

Quality Assurance

Bosch backs this oxygen sensor with more than five decades of OE development and aftermarket supply experience. The 16335 is built to OE-style standards for signal accuracy, heater control, and durability in high-temperature exhaust environments.