Mazda Oxygen Sensor LF4J-18-8G1B Direct Replacement for Original Position

KLP-brand Mazda oxygen sensor LF4J-18-8G1B, replacement for Mazda original parts with consistent material and workmanship; uses high-temperature ceramic core and precise welding; tested on rigs; durable for over 50,000 km. Compatible with LF4J-18-8G1A and LF4J18G1; fits Mazda3, Mazda6, CX-5 and other models. Function: monitor exhaust oxygen content and feed ECU to adjust air–fuel ratio for combustion efficiency and emission compliance. Install as direct OEM replacement; unscrew old sensor and fit new one; simple operation.