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Nowadays, developments in the automotive industry are progressing in two different ways: one of the main trends is to increase the safety of a car (active and passive safety systems, driverless cars, etc.) while the other is to reduce the consumption (engine developments, weight reduction). The demand for low consumption is endless in the automotive industry, and it is not only important in case of oil crisis, or severity of emission rules. The European Union forced the car manufacturers to develop their cars to pass the emission rules, which development is not about the competition anymore. In 2015 there were some emission scandals which showed the problems with the present emission rules, especially with the test method to the publicity. The present test cycle is evadable and at the same time it is outdated. The previous developments (DPF, hybrid drive connected to a 5 or 6 litre petrol engine, ECO and other engine modes, downsizing) were created by the fact that the car has to pass the test only on the dynamometers. Most of the car manufacturers wanted to pass the emission rules with some engine modifications, because of their low price. To integrate a filter or modify the engine control unit does not need large investment opposite to redesign the whole car to reduce its weight. Analysing the data of the new cars we can see that the weight is increasing, though car manufacturers are using high amount of HSS, UHSS, and aluminium alloys [1]. The weight of the Volkswagen Golf from the first series to the present model is shown in Figure 1.

Investigation of the Formability of EN AW 5754 Aluminium Alloy Sheets with Different Thickness