Bosch 17118 Oxygen Sensor - Upstream

Bosch Wideband O2 Sensor for Land Rover

Bosch 17118 is an Actual OE wideband air-fuel oxygen sensor built for precise upstream mixture monitoring. It delivers fast, continuous readings to the ECU, helping maintain accurate fuel control across changing load and temperature conditions.

Compatible with select Land Rover Discovery, Range Rover, Range Rover Sport, and LR4 applications, this Bosch wideband O2 sensor is a direct-fit replacement for upstream use.

Key Features

• Wideband A/F oxygen sensor for continuous air-fuel ratio measurement
• Heated design with optimized heater control for faster light-off
• Specific-fit replacement with 5-wire harness and included wiring harness
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Robust metal housing and ceramic sensor construction
• Oblong male connector with blade terminals

Product Details

Bosch pioneered the wideband planar pump-cell sensor design used in modern engine management systems, and Bosch 17118 reflects that OE development background. As an upstream wideband sensor, it provides the ECU with detailed feedback across the full lambda range, supporting accurate fuel mixture control, stable drivability, and lower emissions. This part cross-references LR035750 for the same application.

Fits 2017-2020 Land Rover Discovery, Upstream. Fits 2013-2019 Land Rover Range Rover, Upstream. Fits 2014-2019 Land Rover Range Rover Sport, Upstream. Fits 2014-2016 Land Rover LR4, Upstream.

What It Helps Address

• Check engine light related to upstream oxygen sensor performance
• Incorrect air-fuel ratio readings from a worn wideband sensor
• Rough idle or inconsistent throttle response caused by poor mixture control
• Reduced fuel economy from inaccurate ECU feedback
• Elevated emissions from delayed or unstable sensor response

Installation Notes

Verify the connector shape, terminal count, and harness length before installation. This Bosch 17118 sensor uses a threaded mount and is intended for upstream placement only. Confirm vehicle application by year, make, model, and position before replacing the original sensor.

Quality Assurance

Bosch supplies OE-developed oxygen sensors backed by more than five decades of engine management experience. The wideband design, heated operation, and durable construction are selected to deliver consistent sensor output in demanding thermal conditions.