Raising the bonnet of the 2008 Citroën C4 1.6 HDi that was manufactured between 2004 and 2011, Mark Shipman at AES points out the failed seal for injector number one (the nearest one to the offside of the engine bay), which can result in catastrophic damage should a build-up of carbon deposits get into the engine and block the oil supply to the turbocharger. He also assures me that between the back of the engine and the bulkhead, there’s an air filter, recalling how when he worked at a dealership, they had figured out a quicker means of changing it by supporting the engine, undoing the offside engine mount and moving the engine to gain access – the official method involves removing the scuttle panel trim.
Neglectful servicing is inevitable when a component
