Originally Posted by Simon Smith
Legally wrong in the UK too, parts have to be to the same specification as the manufacturers, but any "competent person" can do the work.
It's EU law that so long as it is serviced to the same spec as you would get from an authorised dealer they can't deny you warranty.
2002 black Tiger955i, 72000 miles and counting.
2012 black Tiger800XC, 32000 miles and counting.