Bosch 15178 Oxygen Sensor - Downstream or Downstream Left

Bosch Validated Oxygen Sensor 15178

Bosch 15178 is a narrow-band heated oxygen sensor built for precise air-fuel-ratio feedback to the ECU. It supports stable combustion control and emissions management on select Volvo and Land Rover applications, including downstream and downstream left positions.

Key Features

• Specific-fit Bosch Validated Oxygen Sensor for direct application matching
• Narrow-band heated O2 sensor for closed-loop fuel control
• 4-wire design with blade terminals and rectangular male connector
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Wiring harness included; harness length measures 14.2 in
• Metal housing with steel finish for demanding underbody conditions
• Overall length: 17.9 in; sealing surface to connector end: 16.7 in

Product Details

This Bosch Validated Oxygen Sensor line reflects Bosch’s long OE development history in oxygen sensing technology, including narrowband designs that improve light-off response and closed-loop operation. Part number 15178 uses advanced ceramic sensing elements, controlled heating, and high-temperature-resistant materials to maintain consistent signal output under thermal and vibration load. It is a standard replacement sensor for downstream monitoring on select Volvo S60, S60 Cross Country, V60, V60 Cross Country, XC60, XC70, C30, S40, and V50 models, as well as Land Rover LR4 and Range Rover Sport applications.

This part cross-references LR013661 for the same application.

Vehicle Fitment

• Fits 2013-2016 Volvo S60, downstream.
• Fits 2016 Volvo S60 Cross Country, downstream.
• Fits 2015-2016 Volvo V60, downstream.
• Fits 2015-2016 Volvo V60 Cross Country, downstream.
• Fits 2015-2016 Volvo XC60, downstream.
• Fits 2016 Volvo XC70, downstream.
• Fits 2010-2013 Land Rover LR4, downstream left.
• Fits 2010-2013 Land Rover Range Rover Sport, downstream left.
• Fits 2007-2010 Volvo C30, downstream.
• Fits 2004-2010 Volvo S40, downstream.
• Fits 2005-2010 Volvo V50, downstream.

Installation Notes

Confirm the connector shape, wire count, thread size, and sensor position before installation. Bosch 15178 uses a threaded 18 mm mounting design and a 4-wire heated configuration, so the replacement should match the original sensor location and harness routing. Inspect the exhaust bung threads and wiring path for heat damage, corrosion, or contamination before fitting the new sensor.

Quality Assurance

Bosch backs this oxygen sensor with OE-level engineering developed over more than five decades of oxygen-sensor production. The Bosch Validated Oxygen Sensor line is built to deliver accurate signal response and durable operation for emissions control service on the listed Volvo and Land Rover applications.