Ownership Issues  Toyota diesel EGR problems  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).  VW Diesel Particulate Filter issues  The diesel
particulate filter systems on these engines are poorly designed
and prone to serious, ongoing problems. The diesel particulate
filter (DPF) is a device designed to remove soot from the
exhaust gas of the diesel engine. However, diesel particulate
filters must be cleaned from time to time or they will block up.
Typical warning messages include: