That's just it, none, none at all, mainly because I did my own research, before buying, and not listening to the Vectra owner in the pub, who's best mates, sister in laws, dad had a system fitted, on a shoestring budget, and found it went pearshaped on him after 6 months, I got the right system, literally paid a pittance for a two year warranty on it, had it serviced every year, and paid for the flashlube system to be put on it.