Bosch 15988 Oxygen Sensor - Upstream, Upstream Left or Upstream Right

Reliable Oxygen Sensor for Lexus and Toyota Vehicles

The Bosch Validated Oxygen Sensor 15988 is designed specifically for select Lexus and Toyota models, ensuring precise air-fuel mixture readings for optimal engine performance. This heated wide-band oxygen sensor offers a direct fit replacement to maintain your vehicle's emission control system efficiency.

• Heated oxygen sensor with integrated heating element for faster response
• Specific fitment for Lexus and Toyota models including 4Runner, Highlander, GS350, and Tundra
• 4-wire design with blade terminal type and male connector for secure electrical connection
• Threaded mounting type with 18 mm thread diameter and 22 mm hex size for easy installation
• Durable metal housing finished in steel for long-lasting performance
• Includes wiring harness with 6.4-inch length and rectangular male connector
• Standard replacement grade ensuring reliable emission control

About the Bosch Validated Oxygen Sensor Line

The Bosch Validated Oxygen Sensor product line focuses on delivering sensors that meet strict OEM specifications for fit, form, and function. This ensures that the Bosch 15988 oxygen sensor integrates seamlessly with your vehicle’s emission system, providing accurate readings and maintaining compliance with emission standards. The line emphasizes quality and compatibility, making it a dependable choice for Lexus and Toyota owners.

Product Details and Specifications

This wide-band oxygen sensor features a heated element to reduce warm-up time and improve sensor response. The 4-wire configuration supports both the sensor signal and heater circuit, with blade-type terminals and a male rectangular connector for secure and reliable electrical connections. The sensor’s metal housing and steel finish provide durability against harsh engine conditions. Measuring 9.8 inches overall length with an 8.7-inch length from sealing surface to connector end, it fits precisely in the threaded mounting location with an 18 mm thread diameter and 22 mm hex size for installation using standard tools.

Common Applications and Issues Addressed

• Restores accurate air-fuel ratio readings for improved fuel efficiency
• Resolves check engine light triggers related to oxygen sensor faults
• Helps reduce vehicle emissions by maintaining proper combustion control
• Prevents rough idling and engine hesitation caused by faulty sensors
• Supports optimal performance in Lexus GS350, Toyota Land Cruiser, and other compatible models

Installation Notes and Tips

Before installation, ensure the vehicle is cool to avoid burns. Use a 22 mm oxygen sensor socket or wrench for removal and installation. The Bosch 15988 sensor includes a wiring harness with a 6.4-inch length and a male rectangular connector, so verify connector compatibility with your vehicle’s harness. Thread the sensor carefully to avoid cross-threading and torque to manufacturer specifications. No mounting bracket is included, as this sensor mounts directly via threaded installation.

Quality Assurance and Warranty

The Bosch Validated Oxygen Sensor 15988 is manufactured to meet OEM standards for durability and performance. Bosch provides a standard replacement grade sensor designed to maintain emission control system integrity. While specific warranty details may vary, Bosch products typically come with a limited warranty covering defects in materials and workmanship to ensure customer confidence in product reliability.