Bosch 15283 Oxygen Sensor - Downstream, Downstream Left or Upstream

Bosch Oxygen Sensor for OE-Style Emissions Control

Bosch Engineered Oxygen Sensor 15283 is a narrow-band heated O2 sensor built for precise air-fuel-ratio feedback to the ECU. It supports stable combustion control and emissions management across changing engine loads, temperatures, and driving conditions.

With a threaded mounting design, 4-wire harness, trapezoid connector, and 18 mm thread size, this Bosch oxygen sensor is a direct-fit replacement for select Buick, Chevrolet, GMC, Cadillac, Pontiac, Saturn, and Saab applications. It is a practical choice for drivers searching for a Bosch 15283 oxygen sensor for Buick Regal upstream service or a Bosch 15283 O2 sensor for Chevrolet Malibu and Silverado fitment.

Key Features

• Bosch Engineered Oxygen Sensor line with OE-focused design and calibration
• Narrow-band heated oxygen sensor for faster closed-loop operation
• Specific-fit replacement with included wiring harness
• 4-wire, 4-terminal blade connection with male connector and male terminals
• Threaded mount with 18 mm thread diameter and 22 mm hex size
• Metal housing and high-temperature materials for demanding exhaust conditions
• Fits upstream and downstream-left applications depending on vehicle listing

Product Details

Bosch developed its oxygen sensor technology from early thimble-style designs to later planar narrowband sensors that improve light-off speed, lambda accuracy, and closed-loop response. Part number 15283 uses that OE development background in a standard replacement format for vehicles that need accurate exhaust oxygen feedback. This part cross-references GM 12572707 and 12607145 for the same application.

Compatible With select 2003-2017 Buick Regal, Verano, LaCrosse, and Allure applications; Chevrolet Malibu, Impala, Equinox, Express 3500, Silverado 2500 HD, Silverado 3500 HD, Avalanche 2500, Suburban 2500, and Silverado Classic models; GMC Terrain, Savana 3500, Sierra 2500 HD, Sierra 3500 HD, Sierra 3500, and Yukon XL 2500; plus Cadillac STS and SRX, Pontiac G6, Saturn Aura, and Saab 9-5 listings. Bosch 15283 is also listed for upstream and downstream-left positions where specified.

What This Oxygen Sensor Helps Address

• Check engine light concerns related to oxygen sensor performance
• Rough idle or unstable air-fuel feedback at the ECU
• Delayed closed-loop operation after startup
• Emissions test failures tied to sensor response or accuracy
• Fuel control issues caused by aging narrow-band sensor output

Installation Notes

Verify the connector shape, wire count, thread size, and sensor position before installation. This Bosch oxygen sensor uses a threaded mount and a 4-wire harness, so matching the original connector and exhaust location is important for proper fitment. Confirm whether your vehicle calls for upstream, downstream, or downstream-left placement before ordering.

Quality Assurance

Bosch backs this oxygen sensor with more than five decades of OE development experience in emissions sensing. The design uses advanced ceramic elements, optimized heater control, and heat-resistant materials to support consistent operation in harsh exhaust environments.