we have a peugeot 807 2.2 hdi,bought in june 2009.very soon after got the dreaded anti polution fault,got it sorted at local garage which wasnt cheap,we thought that was it but 6 months later its back… :'( (found ANDYS website made a quick phone call got appoinment.got the particular filter taken out of the system altogether.. Andy traveled from doncaster to my home in shildon did his MAGIC 🙂 ) Car now runs smoother quicker and more power and getting at least an extra 6 mpg and the anti polution fault gone forever 😀 cheers colin and clare