Mando 18A1404 Oxygen Sensor - Downstream Left or Upstream

Mando O2 Sensor for Hyundai and Kia

The Mando 18A1404 oxygen sensor is a New Original Equipment replacement built to factory precision specs for select Hyundai and Kia applications. It helps monitor the air-fuel mixture so the engine control system can maintain proper combustion and emissions performance.

Key Features

• OE-style oxygen sensor replacement from Mando New Original Equipment
• Factory precision specifications for accurate signal output
• Direct replacement for upstream and downstream left positions on listed vehicles
• Supports air-fuel ratio monitoring for engine management
• Cross-references Hyundai part numbers 3921037160 and 3921037165

Detailed Description

Part number 18A1404 is an oxygen sensor for select 1999-2002 Hyundai Sonata, 2001-2002 Hyundai Santa Fe, and 2001 Kia Optima applications. Mando builds this sensor as an OE replacement to match original equipment fit and electrical specifications, making it a practical choice for restoring sensor response on Hyundai Sonata, Hyundai Santa Fe, and Kia Optima models. This part number 18A1404 is intended for vehicles listed in upstream and downstream left positions only.

Mando’s New Original Equipment line focuses on factory-style replacement parts for Hyundai and Kia vehicles, with specifications aligned to original equipment requirements. For buyers searching for a Hyundai Sonata oxygen sensor replacement or a Kia Optima upstream O2 sensor, this part provides a direct-fit option for the listed applications.

Common Issues This Sensor Can Address

• Check engine light related to oxygen sensor fault codes
• Rough or erratic engine idle
• Poor fuel economy from incorrect air-fuel mixture readings
• Hard starting or delayed engine start-up
• Reduced engine efficiency on affected Hyundai and Kia models

Installation Notes and Tips

Confirm the sensor position before ordering, since fitment is limited to upstream and downstream left locations shown in the application list. Inspect the connector, wiring, and exhaust threads before installation, and compare the old sensor to the new unit to verify the correct style and lead routing. After installation, clear any stored diagnostic trouble codes and verify proper operation with a scan tool if needed.

Quality Assurance

Mando New Original Equipment parts are built to OE replacement standards with factory precision specs for the listed Hyundai and Kia applications. This helps support consistent sensor performance and proper integration with the vehicle’s engine management system.