Michigan Automotive Compressor, Inc. (MACI) manufactures air conditioning compressors and magnetic clutches for the automotive industry from its plant in Jackson County, Michigan, where it is the largest manufacturer. The company was established on January 25th 1989 and began production in June 1990. Its compressors and magnetic clutches hold the largest market share in North America.
MACI is a joint venture between Toyota Industries Corporation (TICO), which holds a 60% stake, and DENSO, which holds 40%. Operations draw on Japanese manufacturing techniques while maintaining a North American presence, with customers across the automotive and HVAC supply chain. Work is organised across e-machining, e-finishing and assembly.
In August 2025 the company expanded into electric compressors (ERA) and launched night shift operations covering e-finishing, e-machining and assembly, reflecting the automotive industry's transition toward electrification. The company describes its workforce as highly-skilled associates, with an emphasis on teamwork and continuous training to develop skills alongside advances in modern technology.
