All Timing Marks on Ford Focus 1.5 TDCi Explained. • This video highlights the key steps of a complete timing belt drive replacement on a 2015 Ford Focus equipped with the 1.5 TDCi diesel engine (engine code AED). The format is practical and to the point, focusing on the most important details without unnecessary filler. The repair includes a full timing belt service, with replacement of the timing belt itself, the water pump, and both the tensioner and idler pulleys. • The video clearly shows t