Bosch 18019 Oxygen Sensor - Downstream or Downstream Right

Bosch Validated Oxygen Sensor for Land Rover

Bosch Validated Oxygen Sensor 18019 is a narrow-band heated O2 sensor built for precise air-fuel-ratio feedback to the ECU. It supports stable combustion control and emissions management on select Land Rover LR4, Range Rover Sport, and Range Rover applications.

As part of the Bosch Validated Oxygen Sensor line, this replacement sensor reflects Bosch’s OE development background and focuses on accurate signal response, durable construction, and consistent operation under heat and vibration.

Key Features

• Fits select 2010-2013 Land Rover LR4, downstream right
• Fits select 2010-2013 Land Rover Range Rover Sport, downstream right
• Fits select 2010-2012 Land Rover Range Rover, downstream
• Narrow-band heated oxygen sensor for closed-loop fuel control
• Specific-fit design with 4-wire harness and rectangle male connector
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Wiring harness included with 38 in harness length and 41.7 in overall length
• Metal housing and high-temperature-resistant construction

Detailed Description

Bosch 18019 is a standard replacement oxygen sensor engineered for downstream monitoring on compatible Land Rover vehicles. It measures exhaust oxygen content and sends data to the ECU so the engine can maintain the correct air-fuel ratio during normal operation. The heated narrow-band design helps the sensor reach operating temperature quickly and maintain stable feedback across changing load and temperature conditions. This part cross-references Land Rover LR011711 and LR013660 for the same application.

What This Sensor Helps Address

• Check engine light related to oxygen sensor performance
• Slow or unstable closed-loop fuel control
• Incorrect downstream O2 sensor readings
• Emissions test failures tied to sensor response issues
• Rough combustion control caused by aging sensor elements

Installation Notes and Tips

Confirm the connector shape, wire count, thread size, and sensor position before installation. This Bosch 18019 uses a threaded mount, 4-wire harness, and male rectangle connector, so it should be matched to the original sensor configuration on the vehicle. Inspect the exhaust bung threads and wiring routing before tightening the sensor to specification.

Quality Assurance

Bosch has more than five decades of OE oxygen sensor development, and this Validated Oxygen Sensor line is built around the same core priorities used in factory applications: accurate signal output, fast warm-up, and durable operation in high-heat exhaust environments.