Exhaust Gas Recirculation (EGR) valves cause more than their fair share of problems. Problems with the EGR system, like so many vehicle problems, are often caused by a lack of maintenance: diesel owners typically expect high mileages and low maintenance bills. Because owners expect their diesels to go for huge mileages without much maintenance, they don’t pay much attention to their diesel engines until something goes wrong. By then it may be too late. Also, many diesel owners resent paying to have their engine’s EGR valve replaced at a fairly early age (it can be expensive).
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