IHO Holding GmbH & Co. KG

The ATESTEO corporate group is a specialized service provider for Drivetrain Testing and gearbox development within the automotive industry. The company delivers reproducible and traceable drivetrain testing across test benches, test tracks, and real-world road conditions. Core offerings include endurance testing, NVH testing, environmental simulation, E-Mobility testing, and the analysis of components such as brakes, hot gas systems, and inverters. Acting as a DAkkS-accredited, independent partner, ATESTEO supports automotive manufacturers and engineering teams early in the development phase to eliminate defects early and improve drive efficiency and sustainability. The organization operates more than 200 proprietary test rigs worldwide and maintains an in-house calibration laboratory alongside mechanical manufacturing capabilities. Employing over 800 staff across locations in Germany, China, Japan, and the United States, the group covers the central regions of global automotive and gearbox development.