

Within Siemens AG, the area was called "Siemens VDO Automotive". The company and product brands "Siemens VDO" and "VDO Dayton" were continued after the company was integrated. In March 2006, Siemens VDO Automotive AG was legally integrated into Siemens AG. Siemens AG founded the independent automotive technology division in 1989, in 2000 the automotive technology division was spun off from Siemens AG as Siemens Automotive AG and in 2001 merged with VDO to form Siemens VDO Automotive AG. The merger with Siemens Automotive AG created a leading supplier of automotive electronics and mechatronics.

For competitive reasons, Siemens took over VDO alone, while Bosch took over the Rexroth division. However, this did not materialize because Siemens AG took over these areas together with Robert Bosch GmbH.

In 2001 Vodafone took over Mannesmann AG, kept its telecommunications shares and initially intended to list the remaining business areas, including VDO, as an independent AG under the name ATECS (“Advanced Technologies”). This continues to offer bike and heart rate computers under the VDO brand. In 1999 the VDO bicycle computer division was sold to Cycle Parts GmbH in Rohrbach / Landau. In 1998 this was followed by the acquisition of the Philips division Philips Car Communications (audio and car navigation). As a result, Mannesmann Kienzle GmbH (tachographs and taximeters) was integrated into Mannesmann VDO AG. The divisions VDO Luftfahrt (today: Diehl Aerospace), VDO Marine, VDO Verkehrsleittechnik (today: Designa) and VDO Measurement and Control Technology (today: Tecsis) had already been sold. The sole heiress of Adolf Schindling, Liselott Linsenhoff, sold the entire property to Mannesmann in 1991. In 1978 the companies IWC and Jaeger-LeCoultre (mechanical wristwatches ) were bought. The automobile part of Deuta later became VDO Adolf Schindling Tachometerwerke GmbH, which in turn became VDO Adolf Schindling AG. The company VDO (United DEUTA - OTA) was created in 1929 through the merger of DEUTA (Deutsche Tachometer -Werke GmbH) with OTA Apparate GmbH (Offenbacher Tachometer-Werke). DEUTA speedometer of a historic DAAG - Post bus from 1925
