Had a fault on a Saxo cat.
Fitted one from ECP as the customer didn't have much money. After three weeks the car returned with MIL on, tested and found catalyst efficiency fault, tested as required - cat fault. phoned local branch to be told " we never get any problem with our cats" they sent out replacement. Fitted replacement, burnt in and reset as required , sent customer on their way with an apology.
Four weeks later ditto, phoned ECP to be told "there must be a fault with the car we never have a problem with our cats".
Got fed up with the embarrassing situation of a customer coming back twice with the same fault so sourced a cat from another supplier, fitted it about six months ago now - make your own conclusion.
Still waiting to be paid the labour claims I sent in but I don't take excuses. Why should we lose out when its thier parts at fault? Courts soon!