Bosch 18021 Oxygen Sensor - Downstream Right or Upstream Right

Reliable Oxygen Sensor for Hyundai and Kia Vehicles

The Bosch Validated Oxygen Sensor 18021 is designed specifically for select Hyundai and Kia models, including the Genesis, Santa Fe, Santa Fe XL, Sedona, and Sorento. This narrow-band heated oxygen sensor ensures accurate emissions control and optimal engine performance.

• Specific fit for Hyundai and Kia models
• Narrow-band heated oxygen sensor type
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Four-wire design with blade terminals and male connectors
• Wiring harness length of 30.3 inches included
• Durable metal housing with steel finish
• Overall length of 25.8 inches for precise installation

About the Bosch Validated Oxygen Sensor Line

The Bosch Validated Oxygen Sensor product line focuses on delivering reliable and tested emission control components tailored to specific vehicle applications. The 18021 sensor is engineered to meet OEM specifications, providing consistent performance and durability for Hyundai and Kia vehicles. This line emphasizes compatibility and quality to support proper engine management and emissions compliance.

Product Details and Specifications

This Bosch oxygen sensor features a narrow-band heated design, which allows for faster sensor response and improved fuel mixture control. The sensor includes a threaded mounting type with an 18 mm thread diameter and a 22 mm hex size for secure installation. It has a four-wire configuration with blade-type terminals and a male connector in a square shape, ensuring proper electrical connection. The wiring harness length is 30.3 inches, and the overall length from sealing surface to connector end is 24.6 inches, providing flexibility during installation. The sensor housing is made of metal with a steel finish, weighing approximately 0.485 pounds.

Compatible Vehicles and Common Applications

• Hyundai Genesis
• Hyundai Santa Fe and Santa Fe XL
• Kia Sedona
• Kia Sorento

This oxygen sensor is used to monitor exhaust gases and help regulate the air-fuel mixture for efficient combustion and reduced emissions. It is essential for resolving issues such as:

• Check engine light triggered by oxygen sensor faults
• Poor fuel economy due to incorrect air-fuel mixture
• Failed emissions tests
• Rough engine idle or hesitation
• Increased exhaust emissions

Installation Notes and Tips

The Bosch 18021 oxygen sensor is a direct fit replacement designed for specific Hyundai and Kia models. It features a threaded mounting type for straightforward installation using a 22 mm hex socket. Ensure the wiring harness is routed properly to avoid damage and confirm the connector securely mates with the vehicle’s wiring. No mounting bracket is included, so use the existing sensor location and hardware. Proper torque specifications should be followed to avoid sensor damage.

Quality Assurance and Warranty

Bosch oxygen sensors are manufactured to meet strict quality standards and OEM specifications. The Bosch Validated Oxygen Sensor 18021 undergoes rigorous testing to ensure reliable performance and durability. While specific warranty details are not provided here, Bosch typically offers coverage against defects in materials and workmanship. Refer to Bosch or vehicle manufacturer documentation for exact warranty terms.