Heres a list common problems to look out for when youre choosing one. Citroen C4 Picasso braking problem. Some models built between May and December 2006 had braking issues. The check valve Answered by Honest John Presumably a diesel? Injector problems are quite common, but I would not have expected the waterpump to have failed at 40k miles and thrown off the timing belt. 60k miles plus, yes. Are you absolutely certain that the car had not been clocked before you bought it? Tags: mpvs diesel engines technical issues f7xg.