BorgWarner is a Tier I auto-parts supplier with three operating segments. The air management group makes turbochargers, e-boosters, e-turbos, timing systems, emissions systems, thermal systems, gasoline ignition technology, powertrain sensors, and cabin heaters. The drivetrain and battery systems group produces automatic transmission components, torque management products, battery heaters, battery charging, and battery modules. The e-propulsion segment makes e-motors, power electronics, and software and control modules. The company's largest customers are Ford and Volkswagen at 14% and 11% of 2023 revenue, respectively. Geographically, Europe accounted for 36% of 2023 revenue, while Asia and North America were 34% and 29% apiece.