Was speaking to bloke who used to be a senior engineer for about 20 years with two large car manufacturers (one Swedish and one German) and he reckoned that the injectors on practically all common rail diesel engines will run into problems.
He gave me a long technical explanation (which was over my head TBH) but the gist of what he seemed to be saying is that the diesel injectors across many manufacturers (with the exception of Honda who use their own design as in the most recent Accord) come from limited sources such as Bosch, Siemens, Lucas etc and that because of the extremely high pressure which diesel is forced through them (something like 1200 bar, or psi?), a spring mechanism within those injectors will fail sooner than those found in petrol engines or non common rail diesels engines.
He says failure rates are reflected in the types and number of warranty claims made against the manufacturers he used to work for with far higher than average incidences of injector failure on common rail diesel engines etc. He reckons that manufacturers are still strugglying with high mileage tolerances with the injectors on common rail diesel engines.
I did some scanning of various user websites as I've been considering a Volvo S60 and Mondeo recently and true enough, there do seem to be problems with the injectors used in the 2002 D5 engined Volvos and a higher than average number of injector faults with high mileage Ford TdCI engines with numerous owners stories about such failures.
Anyone have any views, technical or otherwise?