Mando 18A1405 Oxygen Sensor - Upstream

Mando O2 Sensor OE Replacement

The Mando 18A1405 oxygen sensor is a New Original Equipment replacement built to factory precision specs for accurate air-fuel monitoring. It helps restore proper engine feedback for Hyundai and Kia applications when the original upstream sensor is no longer reading correctly.

Compatible With 2006-2010 Kia Optima, upstream; 2006-2008 Hyundai Sonata, upstream; and 2007-2008 Kia Rondo, upstream.

Key Features

• OE replacement oxygen sensor for upstream placement
• Factory-spec fit and signal performance
• Supports air-fuel mixture monitoring for combustion control
• Direct replacement for Hyundai and Kia applications
• Part number 18A1405 for easy identification

Detailed Description

Mando 18A1405 is an upstream oxygen sensor made for drivers replacing a worn or inaccurate factory sensor on select Hyundai and Kia vehicles. As part of the emission control system, the sensor reports exhaust oxygen content so the engine control system can adjust fueling. This OE-style replacement is suited for 2006-2010 Kia Optima, 2006-2008 Hyundai Sonata, and 2007-2008 Kia Rondo applications. This part also cross-references Hyundai/Kia OE number 39210-25300 for the same application.

What It Helps Address

• Check engine light related to oxygen sensor faults
• Rough or unstable engine idle
• Poor fuel economy from incorrect air-fuel readings
• Hard starting caused by inaccurate sensor feedback
• Emission control issues tied to upstream sensor failure

Installation Notes and Tips

Install in the upstream sensor location specified for the vehicle. Confirm connector style, thread engagement, and routing before final tightening. Clear diagnostic trouble codes after installation and verify repair with a road test and scan tool data review.

Quality Assurance

Mando New Original Equipment parts are built to factory precision specifications for OE-style replacement performance. Part number 18A1405 is intended for direct replacement use on the listed Hyundai and Kia applications.