Lamda Sensor 4.9 NTK

Description

This high-performance NTK Wideband Lambda Sensor is a 5-wire Universal Exhaust Gas Oxygen (UEGO) sensor designed for precision air-fuel ratio monitoring in demanding automotive environments.
​While the “4.9” designation is most commonly associated with Bosch LSU sensors, NTK sensors (such as the LZA or L2H2 series) are frequently used as the premium, more robust alternative for many of the same high-performance applications.
​Key Features & Benefits
​High-End Precision: Unlike standard narrowband sensors that only signal “rich” or “lean,” this wideband sensor provides a linear signal across a broad range (0.65\lambda to air), allowing for exact fuel table adjustments.
​Superior Robustness: NTK sensors are renowned in the tuning industry for being more resistant to “lead poisoning” and thermal shock compared to other brands, making them the preferred choice for race engines using leaded fuel or methanol.
​Extended Range: Capable of reading extremely rich mixtures—down to a 2:1 AFR for methanol applications—which is nearly double the range of standard performance sensors.
​Fast Light-Off Time: Optimized heater control ensures the sensor reaches its operating temperature (350^{\circ}\text{C}) quickly, reducing the time spent in “open-loop” mode.