Niterra's automotive and semiconductor-related parts share a common ceramic-technology base, and the company manufactures both categories of components, notably NGK spark plugs. Since its inception it has expanded mainly in internal combustion engine–related business such as spark plugs, whose NGK versions fit virtually every type of petrol engine, from cars, motorcycles, and marine applications to small engines and power tools. Under the NTK brand it offers products such as semiconductor packages, exhaust gas sensors, and electrostatic chucks.
The NGK Ignition Parts brand groups its components into four product lines: spark plugs, glow plugs, ignition coils, and ignition cables and connectors. The NTK Vehicle Electronics range comprises seven product lines: lambda sensors, exhaust gas temperature sensors, exhaust gas recirculation valves, intake manifold and boost pressure sensors, mass air flow sensors, speed and position sensors, and exhaust gas and differential pressure sensors and throttle bodies. NGK Ignition Parts serves OE and aftermarket customers worldwide.
