Bosch 16063 Oxygen Sensor - Downstream

Bosch 16063 Oxygen Sensor for Cadillac Catera

Bosch 16063 is a specific-fit, narrow-band heated oxygen sensor built for downstream use on the 1999-2001 Cadillac Catera. It provides the ECU with air-fuel-ratio feedback needed for stable closed-loop fuel control and emissions monitoring.

Key Features

• Specific-fit Bosch Actual OE Oxygen Sensor
• Narrow-band heated oxygen sensor design
• 4-wire configuration with pin terminals
• Oblong female connector with included wiring harness
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Metal housing for high-temperature and vibration resistance
• Wiring harness length: 10.2 in; overall length: 13.6 in

Product Details

Bosch 16063 is part of Bosch’s Actual OE Oxygen Sensor line, which builds on Bosch’s long history of OE oxygen sensor development. Bosch introduced the original thimble-style sensor in 1976 and later advanced planar narrowband designs for faster light-off, improved lambda accuracy, and quicker closed-loop response. This downstream oxygen sensor is engineered for the 1999-2001 Cadillac Catera and is also referenced by part number 9120293 for the same application. Bosch 16063 is a direct-fit replacement for drivers who need accurate exhaust feedback and consistent sensor response under normal thermal and vibration loads.

Used For

• Replacing a failed downstream oxygen sensor on a 1999-2001 Cadillac Catera
• Restoring proper air-fuel-ratio feedback to the ECU
• Addressing oxygen sensor fault codes related to downstream monitoring
• Correcting poor emissions test results caused by sensor degradation
• Resolving drivability issues tied to inaccurate closed-loop fuel control

Installation Notes

Fits 1999-2001 Cadillac Catera, downstream. Confirm the connector shape, 4-wire layout, and 18 mm threaded mounting before installation. Use the existing harness routing and sensor location as a reference, and verify the exhaust bung threads are clean and undamaged before threading in the sensor. Bosch 16063 is a direct replacement for the listed application and should be matched to the vehicle’s downstream position only.

Quality Assurance

Bosch supplies this oxygen sensor as an OE-proven replacement backed by more than five decades of oxygen sensor development and aftermarket support. The design uses advanced ceramic elements, controlled heater operation, and heat-resistant materials to maintain consistent signal quality in demanding exhaust conditions.