Founded in 1936, Diamond Electric Manufacturing is an automotive ignition coil manufacturer. The company offers a wide range of engineering design and manufacturing services. Its product line includes ignition coils, sensors, transmission switches, and industrial and home fuel ignitors. It is an ISO 9001-certified company and operates research, simulation and testing facilities. Its mobile lab offers a wide range of testing capabilities that include thermal, corrosion, heat and humidity testing. The company also undertakes X-ray, decomposition and dimensional analysis for its products. Diamond Electric Manufacturing has its corporate office and manufacturing facility located in Dundee, Mich.