Bosch 15141 Oxygen Sensor - Downstream Right

Bosch Validated Oxygen Sensor for OE-Style Control

Bosch Validated Oxygen Sensor 15141 is a specific-fit, narrow-band heated O2 sensor built for precise air-fuel-ratio feedback to the ECU. It supports stable combustion control and emissions management in applications such as the 2007-2010 Cadillac STS downstream right and 2007-2009 Cadillac SRX downstream right.

Key Features

• Specific-fit oxygen sensor for direct application matching
• Narrow-band heated sensor design for closed-loop fuel control
• 4-wire configuration with square connector and pin terminals
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Wiring harness included with 27.8 in harness length
• Metal housing and high-temperature-resistant construction
• Bosch Validated Oxygen Sensor line backed by OE development experience

Product Details

Bosch part number 15141 uses a switching-type narrow-band design to report oxygen content in the exhaust stream so the engine control unit can adjust fueling accurately. Bosch developed this sensor family from its original oxygen sensor work and later planar narrowband designs, focusing on faster light-off, quicker closed-loop operation, and accurate lambda feedback. For Cadillac STS and Cadillac SRX applications, this sensor supports downstream right monitoring where precise exhaust feedback is required for emissions control and drivability.

The Bosch Validated Oxygen Sensor line is positioned as an OE-style replacement range for drivers who want a direct-fit sensor with proven ceramic elements, controlled heater operation, and durable materials that stand up to heat and vibration. Bosch 15141 is a practical choice when replacing a worn downstream O2 sensor on the Cadillac STS or Cadillac SRX.

This part cross-references 12610969 for the same application.

What This Sensor Helps Address

• Check engine light related to oxygen sensor performance
• Slow or inaccurate air-fuel feedback to the ECU
• Rough closed-loop fuel control during normal driving
• Emissions test failures tied to downstream sensor faults
• Sensor response issues caused by heat cycling and vibration

Installation Notes and Tips

Install Bosch 15141 in the downstream right position only where listed fitment applies. Confirm the 18 mm thread size, square connector shape, and 4-wire layout before installation. Because this is a threaded sensor, use the correct oxygen sensor socket or wrench and inspect the exhaust bung threads for damage or contamination before tightening. Verify the harness routing keeps the connector away from exhaust heat and moving components.

Quality Assurance

Bosch draws on more than five decades of OE oxygen sensor development, and this Validated Oxygen Sensor line is built to OE-proven standards for accuracy, durability, and consistent heater control. Bosch 15141 is engineered for dependable exhaust feedback in the listed Cadillac applications.