Bosch 15184 Oxygen Sensor - Upstream

Bosch Actual OE Oxygen Sensor for Land Rover

Bosch 15184 is a narrow-band heated oxygen sensor built for precise air-fuel-ratio feedback to the ECU. It is a specific-fit replacement for select Land Rover applications, including upstream positions on the Freelander and Range Rover.

The Bosch Actual OE Oxygen Sensor line reflects Bosch’s long OE development history, with sensor designs that evolved from early thimble-style units to faster-responding planar narrowband technology. This Bosch 15184 oxygen sensor uses a threaded metal housing, a 4-wire blade-terminal connector, and an included wiring harness for direct replacement service.

Key Features

• Part number 15184
• Actual OE Oxygen Sensor line from Bosch
• Narrow-band heated oxygen sensor
• Specific fit for select Land Rover upstream applications
• 4-wire design with rectangular female connector
• Threaded mounting with 18 mm thread diameter
• 22 mm hex size for service removal
• Wiring harness included
• Metal housing with high-temperature-resistant construction

Detailed Description

Bosch 15184 is an upstream oxygen sensor that measures exhaust oxygen content and sends accurate feedback to the engine control unit for closed-loop fuel control. For 2002-2004 Land Rover Freelander and 1999-2002 Land Rover Range Rover applications, this sensor supports stable combustion control and emissions management under changing operating conditions. Bosch’s OE-focused sensor engineering emphasizes fast light-off, accurate lambda response, and consistent performance in heat and vibration.

This part cross-references Monroe Shocks & Struts (e.g., MHK100940) for the same application. If you are replacing a worn Land Rover Freelander oxygen sensor or a Range Rover upstream O2 sensor, Bosch 15184 provides a direct-fit service part with the correct connector style and threaded mount.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Rough idle caused by inaccurate air-fuel feedback
• Fuel trim issues from slow or inconsistent sensor response
• Emissions test failures tied to upstream sensor faults
• Reduced closed-loop fuel control on Land Rover Freelander and Range Rover models

Installation Notes and Tips

Install Bosch 15184 in the upstream location specified for the vehicle. Confirm the connector shape, wire count, thread size, and harness length before installation. Use the correct oxygen sensor socket or 22 mm wrench size, and inspect the exhaust bung threads for damage or contamination before threading in the new sensor.

For Land Rover Freelander and Range Rover oxygen sensor replacement, verify the original sensor position and connector routing to ensure proper fitment. Bosch 15184 is a specific-fit replacement, so matching the vehicle year, model, and upstream location is important.

Quality Assurance

Bosch has more than five decades of OE oxygen sensor development and supplies aftermarket sensors built to OE-proven standards. The Bosch Actual OE Oxygen Sensor line is based on Bosch’s original sensor engineering and later narrowband planar advancements for accurate, durable operation.