Bosch 15823 Oxygen Sensor - Downstream Right

Bosch Validated Oxygen Sensor for Volvo XC90

Bosch Validated Oxygen Sensor 15823 is a specific-fit, narrow-band heated O2 sensor built for precise air-fuel-ratio feedback to the ECU. It is listed for the 2007-2014 Volvo XC90, downstream right, and uses a threaded 18 mm mount with a 4-wire harness and rectangular connector.

Part number 15823 is part of Bosch Validated Oxygen Sensor coverage, a line focused on OE-style replacement fitment and sensor performance for emission control service. For Volvo XC90 downstream right applications, Bosch 15823 supports stable closed-loop operation with the correct connector, harness length, and heater-equipped design.

Key Features

• Specific-fit oxygen sensor for 2007-2014 Volvo XC90, downstream right
• Narrow-band heated sensor for standard replacement service
• 4-wire design with included wiring harness
• Threaded 18 mm mounting with 22 mm hex size
• Rectangular male connector with blade terminals
• Metal housing and steel finish for underbody service conditions
• Overall length: 31.9 in; harness length: 28.5 in

Detailed Description

Bosch 15823 is an emission control sensor that measures exhaust oxygen content and sends the signal needed for fuel control adjustments. On the Volvo XC90, downstream right placement means this sensor monitors catalyst efficiency after the converter, helping the engine management system maintain proper operation and emissions control. Bosch’s oxygen sensor development includes early thimble-style designs and later planar narrow-band technology, with a focus on faster light-off, accurate lambda feedback, and quicker closed-loop response.

This part cross-references Volvo 30774651 for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio feedback to the ECU
• Slow or unstable closed-loop fuel control
• Emissions test failures tied to downstream sensor faults
• Sensor signal issues caused by heat, vibration, or age

Installation Notes and Tips

Confirm the downstream right location before installation on the 2007-2014 Volvo XC90. Verify the 18 mm thread size, 4-wire connector style, and harness routing match the original sensor. Use proper oxygen sensor service tools to avoid damaging the threaded bung or connector during removal and installation.

Quality Assurance

Bosch backs this oxygen sensor with more than five decades of OE development experience and validated aftermarket coverage. The sensor uses advanced ceramic elements, optimized heater control, and high-temperature-resistant materials for consistent operation in demanding thermal and vibration conditions.