VDO is a German brand of Continental Automotive which makes automotive electronics and mechatronics for powertrain, engine management system, fuel injection Systems.

VDO was founded by Adolf Schindling and the result of a merger between DEUTA (Deutsche Tachometer-Werke GmbH) and OTA Apparate GmbH (Offenbacher Tachometer-Werke GmbH) in the German city of Frankfurt am Main in 1929 VDO stands for “Vereinigte DEUTA – OTA”

In 1991, the company was acquired by Mannesmann. In 1999, Mannesmann was itself acquired by Vodafone and VDO was put up for sale. In 2000, the company was acquired by Siemens AG, Germany’s biggest engineering company, and re-branded as Siemens VDO. Siemens sold VDO to Continental in 2007.