Why half of them are decent I've brought plenty of cheap parts from repco that didn't last. Why do mechanics say that when they wont warranty the rubbish they supply and wont install the rubbish I supply? When the part the mechanic fits fails with in 3 months he wouldn't fit the part I gave him should he warranty the part he supplied free of charge? The 20% mark up?
Says on the packets of parts, warranty void if not fitted by qualified person.(Or something along those lines) Read the packet...
So if you're going to a shop and they claim they won't warrant parts they supply and fit, they're B/Sing you.....
And yes, not warranting parts you supply is because when a claim is made against faulty parts, the supplier only covers the cost of the parts, not the labour...So the cheaper price they get the parts for goes a little way to cover the labour costs if they fail...
Very rarely (if ever) does a customer cover the cost of the labour if their supplied parts fail.....That's why businesses don't want to fit parts you supply