The problem was 2001/2 so the one you're looking at is highly unlikely to cause a problem.
Even on the problem cars, it was often only one injector which needed replacing, it was just the Volvo stance to change all 5 plus pipework hence the astronomical cost.
My 2002 had one fail at around 165k miles but regardless, I wouldn't let it put me off any early D5.
A minor problem, fixable relatively cheaply.
