On 26.07.2019 the first provider of hardware retrofits was granted a “General type approval (ABE) for NOx reduction systems for retrofitting passenger cars”. In this Tread I would like to collect information about the hardware retrofits. So, among other things, what providers and solutions there are, what these costs, which car manufacturers give a subsidy, which workshops offer retrofits and what experiences you have had with upgraded vehicles. I have been able to collect nfos so far: Type-approvals from the KBAZusschuss der Daimler AG für Hardware RetrofitsFAQ for hardware retrofits from VWInfos about Baumot’s HW retrofitsInfos about Dr Pley’s HW retrofits The media coverage of HW retrofits is of course just as much a topic as the political decisions for/against the retrofits.