Z4 is a variety of roadsters anc coupes that are being produced since 2002. Z4 is a successor to Z3. First generation of Z4 were based on E85 & E86 and produced since 2003 until 2009, second one models were based on E89 and were produced between 2009 and 2016. And the last, third one was introduced in 2018. Z4 received inline-4 and straight-6 petrol engines.