Electronic Control Units (ECUs) dominate all areas of the modern vehicle. Initially the engine was controlled by an ECU, but today we find ECUs in dashboards, infotainment systems, sat-navs, transmissions, suspension and emissions control systems to name a few. In our 10-page feature on ‘An introduction to ECUs’ we look at what can go wrong and your repair options. Also... we introduce our new project car to run over six issues – a 2010 Lexus IS 250. We carry out a full maintenance service on a Vauxhall Astra J and change the timing belt on a Ford Mondeo 2.0 TDCi. And much, much more…