Hyundai Kia Oxygen Sensor 39210-37520 NTK588H3 Replacement 3921037540

This oxygen sensor is designed for multiple modern Kia/Hyundai models: 2011-2015 Kia K5 (2.0L/2.4L), 2012-2016 Hyundai Sonata (2.0L/2.4L), and 2013-2017 Kia Sportage (2.0L/2.4L); displacement range 2.0L–2.4L. Core function: monitor exhaust oxygen content and feed ECU to optimize air-fuel ratio, improving efficiency and reducing emissions. OEM: 39210-37520; also compatible with 39210-37540, 39210-37530 and NTK 588H3/588H4 replacements. Cross-check stock accordingly. Replacement medium; use dedicated oxygen sensor socket; avoid thread damage; apply anti-coupling agent to extend life. For B2B buyers, NTK-standard sensor with stable performance; suitable for bulk purchase for maintenance or refurbishment, reducing fuel-economy issues and MIL occurrences due to O2 sensor faults.