Bosch 15482 Oxygen Sensor - Upstream

Bosch Wideband O2 Sensor for OE-Style Control

Bosch Validated Oxygen Sensor 15482 is a wideband air-fuel ratio sensor built for precise mixture feedback to the engine control unit. It is a specific-fit, heated replacement with a 4-wire blade terminal design, making it a direct service part for select Subaru Legacy, Subaru Outback, and Acura TSX upstream applications.

The Bosch Validated Oxygen Sensor line focuses on OE-level fit and signal accuracy for modern engine management systems. Part number 15482 uses Bosch wideband sensor technology with fast light-off, optimized heater control, and a durable ceramic construction for stable operation during load changes and thermal cycling.

Key Features

• Wideband A/F oxygen sensor for continuous air-fuel ratio measurement
• Specific-fit replacement with threaded mounting
• Heated design for faster operating temperature
• 4-wire configuration with blade terminals
• Rectangle female connector with included wiring harness
• 18 mm thread diameter and 22 mm hex size
• Overall length: 25.2 in; harness length: 21.8 in
• Standard replacement grade for OE-style service

Detailed Description

Bosch 15482 is a wide band oxygen sensor that provides the ECU with detailed air-fuel ratio data across the full lambda range, helping the engine manage fueling more precisely than a traditional switching sensor. This matters on vehicles that rely on upstream feedback for mixture control, emissions performance, and drivability. It is a direct-fit option for 2010-2012 Subaru Legacy upstream, 2010-2012 Subaru Outback upstream, and 2004-2008 Acura TSX upstream applications. This part cross-references 36531RBB003 for the same application.

For buyers searching for a Subaru Legacy upstream oxygen sensor, Subaru Outback upstream O2 sensor, or Acura TSX upstream wideband sensor, Bosch 15482 provides the OE-style configuration needed for proper installation and signal response. The Bosch Validated Oxygen Sensor 15482 is backed by Bosch’s long OE development history in engine management and emissions control.

Common Issues This Sensor Can Address

• Check engine light related to upstream oxygen sensor performance
• Incorrect air-fuel ratio readings at the ECU
• Rough idle or hesitation caused by inaccurate mixture feedback
• Reduced fuel economy from poor fueling control
• Elevated emissions from delayed or unstable sensor response

Installation Notes and Tips

Confirm the upstream sensor location before ordering, since this part is not for downstream use. Verify connector shape, wire count, thread size, and harness length against the original sensor before installation. Use the correct oxygen sensor socket for the 22 mm hex and 18 mm threaded mounting, and inspect the harness routing to avoid heat damage after installation.

Quality Assurance

Bosch supplies this validated oxygen sensor as a standard replacement part built to OE-style specifications for fit, signal accuracy, and durability. Bosch’s wideband sensor design is based on the planar pump-cell architecture used in modern engine management systems.