From a survey, the frequent and abnormal oil pump motor failure, either the chain or the hexagonal shaft, results in a phenomenon typical of the engines 2.0 tdi 140CV. The defect is well known, since, on those engines, Audi has introduced important changes to the oil pump system: a kit in which the pump is not driven by a chain but rather by a system of gear sprockets. The breaking chain or the faulty hexagonal shaft must be considered abnormal as it is not due by poor maintenance, and much less, due to the mileage (Audi would have otherwise provided routine maintenance). The oil pump failure must be considered a constructive defect because the oil pump chain replacement no longer exists and is repaired by only the modification kit. I firmly considered myself damaged by the occurred event due to a flaw design that Audi, despite many reported cases, suggest to repair with an oil pump modified kit. Repairing an anomaly, if not recognized in time, as it can suddenly happen, it can permanently damage the whole engine, causing enormous damage. The replacement must be supposed to be a part of a major recall of all cars involved. A major recall that, in light of the facts, I feel a civic and moral duty. A moral duty with respect and gratitude to the customers. A civic duty, because, the anomaly is an event highly dangerous to the passengers’ safety. The oil pump failure leads to engine seizure and failure of the tandem pump. In the first case, although a remote possibility, the car may suddenly stop/stall, in the second case the breaking efficiency is very reduced or compromised. In both cases, who can exclude that this defect could cause serious accidents. Although Audi might be restless to recall those involve vehicles (it is understandable, because the recall would be cost a fortune in terms of money and brand image) it would have been very wise if Audi would have warn/call all the Audi A4 2005 & 2006 owners in order to prevent repair the anomaly and avoid to the own fidelity customer to pay a fortune in repairing costs.