Bosch 15799 Oxygen Sensor - Downstream

Bosch Oxygen Sensor 15799 for Suzuki Forenza

Bosch Engineered Oxygen Sensor 15799 is a narrow-band heated downstream O2 sensor built for precise air-fuel-ratio feedback to the ECU. It supports stable combustion control and emissions management for 2006-2008 Suzuki Forenza applications.

Key Features

• Specific-fit oxygen sensor for direct application matching
• Narrow-band heated sensor design for closed-loop fuel control
• 4-wire configuration with rectangular male connector
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Wiring harness included with 17.6 in harness length
• Metal housing for high-temperature and vibration resistance
• Downstream position for 2006-2008 Suzuki Forenza

Product Details

Bosch 15799 is part of the Bosch Engineered Oxygen Sensor line, a product family developed from Bosch OE oxygen sensor engineering and refined through planar narrowband technology for faster light-off, improved lambda accuracy, and quicker closed-loop operation. This sensor uses a heated narrow-band design with advanced ceramic elements and optimized heater control to deliver consistent signal response under demanding thermal conditions. For drivers searching for a downstream oxygen sensor for 2006-2008 Suzuki Forenza, Bosch 15799 provides the OE-style replacement format expected for emission control service. This part cross-references 1821385Z20 and 96418970 for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio feedback to the ECU
• Rough idle or unstable combustion control from a worn downstream sensor
• Emissions test failures tied to sensor response issues
• Delayed closed-loop fuel control after sensor aging

Installation Notes

Fits 2006-2008 Suzuki Forenza, downstream. Confirm the threaded mounting location, 18 mm thread size, 4-wire connector layout, and harness routing before installation. Use the existing sensor port and verify connector orientation and sealing surface fitment during replacement. Bosch 15799 is a direct-fit style replacement for the listed application.

Quality Assurance

Bosch backs this oxygen sensor with more than five decades of OE development and aftermarket supply experience. The design uses durable materials intended to maintain accurate sensor output in harsh heat and vibration environments.