Bosch 15971 Oxygen Sensor - Upstream

Bosch OE Oxygen Sensor for Nissan Altima

Bosch 15971 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 the 2000-2001 Nissan Altima, upstream, with OE-style fitment and a threaded mounting design.

Key Features

• Actual OE Oxygen Sensor line from Bosch
• Narrow-band heated sensor for closed-loop fuel control
• Specific fit for upstream Nissan Altima applications
• 3-wire design with included wiring harness
• Blade terminals, oblong connector, male connector and terminal ends
• Threaded mounting with 18 mm thread size and 22 mm hex size
• Metal housing for high-temperature and vibration resistance

Product Details

Bosch 15971 uses advanced ceramic sensing elements and optimized heater control to deliver fast light-off and accurate lambda feedback during warm-up and normal driving. As part of Bosch’s Actual OE Oxygen Sensor line, it reflects more than five decades of OE development and is built to maintain consistent signal quality under thermal stress. This sensor is a direct-fit replacement for the upstream position on the 2000 Nissan Altima and the 2001 Nissan Altima built to 11/2000. This part cross-references Nissan 226900Z801 for the same application.

Common Issues This Sensor Can Address

• Check engine light related to oxygen sensor performance
• Rough idle or unstable air-fuel mixture control
• Delayed closed-loop operation after cold start
• Excess fuel consumption caused by inaccurate O2 feedback
• Emissions test failures tied to upstream sensor faults

Installation Notes and Tips

Confirm the upstream location before installation and verify thread size, connector shape, and harness length against the original sensor. The threaded design installs into the exhaust stream, so use proper oxygen sensor service tools and inspect the connector routing to avoid heat damage. For the 2001 Nissan Altima, verify the build date note of 11/2000 before ordering or installing Bosch 15971.

Quality Assurance

Bosch supplies OE-proven oxygen sensor technology to the aftermarket, using durable materials and heater control strategies developed for demanding engine and exhaust conditions. Bosch 15971 is built to deliver consistent sensor response and reliable emissions-system feedback in the Nissan Altima application.