Righto, I know next to nothing about the mechanic side of cars, so I would appreciate some guidance as to the above.

My father in law drives an 02 plate Mondy TDci estate which is running rather badly. Local garage have advised him that two of the injectors need replacing at a cost of £300 each, plus fitting.

Like I say, I know nothing about mechanics but I just thought this seemed a bit costly. Any ideas where they may be a wee bit cheaper please.