BOSJINLAI Upstream O2 Oxygen Sensor for Hyundai & Kia 1.8L–2.0L — Direct‑Fit, Fast Response

If your vehicle is running rich, throwing an OBD-II code, or showing reduced fuel economy, a faulty upstream oxygen sensor can be the cause. This BOSJINLAI upstream O2 sensor is manufactured from engine-grade materials, factory-tested, and built for a plug-and-play replacement on a wide range of Hyundai and Kia models from roughly 2011–2024. It supplies stable signal output and fast response to help the engine management system adjust fuel delivery and emissions strategy.

Which cars and engines is this O2 sensor compatible with?

This sensor fits many Hyundai and Kia models equipped with 1.8L and 2.0L engines. It is intended as an upstream (pre-catalytic converter) replacement for specific model years—always confirm fit by entering your vehicle details before ordering.

• Hyundai: Elantra, Elantra Coupe, GT, Kona, Sonata, Tucson, Veloster (2011–2021 ranges)
• Kia: Forte, Forte Koup, Forte5, Optima, Seltos, Soul (2012–2024 ranges)
• Replace part numbers: 234-5082, 2345082, 234 5082, 39210-2E100, 392102E100, 24325

How does this upstream oxygen sensor improve engine performance?

The BOSJINLAI O2 sensor provides accurate, rapid voltage/signal output so the ECU receives reliable air/fuel ratio data. A responsive upstream sensor helps the engine adjust fuel trims quickly, which can improve drivability and fuel usage when functioning correctly.

• Rapid signal response reduces lag in fuel trim corrections
• Stable output helps maintain consistent engine operation under varying loads
• Direct-fit electrical connector and mounting for straightforward replacement

What should I expect during installation and maintenance?

The sensor is designed for direct installation and is suitable for both professional mechanics and experienced DIYers. Proper installation torque and using anti-seize only where recommended will ensure longevity; always disconnect the battery and follow vehicle-specific procedures.

• Comes pre-tested from the factory for correct operation
• Direct-replacement fit minimizes modifications or adapters
• Installation tools: oxygen sensor socket, ratchet, anti-seize (if specified), torque wrench

What quality controls and part assurances does BOSJINLAI provide?

Each unit undergoes factory testing to validate output and response characteristics. BOSJINLAI sources engine-compatible materials and assembles components to meet reliability expectations for automotive sensors, and offers customer support for fitment questions.

• Manufactured from selected materials tailored for engine environments
• Factory-tested to ensure consistent signal output before shipping
• Customer support available—contact BOSJINLAI for assistance within 24 hours

Who this is for: Drivers and technicians who need a reliable upstream oxygen sensor replacement for compatible Hyundai and Kia 1.8L–2.0L vehicles. It’s suited to owners troubleshooting fuel trim codes, addressing reduced fuel economy, or replacing a failing pre-cat O2 sensor with a direct-fit, tested aftermarket part. Before purchasing, verify your exact model and year against the listed replace part numbers to ensure compatibility.