If you are going to take on that job, its mad not to use a genuine part to replace it with. Unless you fancy doing it again as the hose you used gave up after 2 weeks lol.
Some people say that this hose causes problems due to a design defect on the part of Toyota. Either that or the fact it is a bitch to get to is a design defect. Not sure, my head is mushy at the minute as I have been in work for 16 hours and counting .......
Worth a bit more research but I would suggest not using garden hose from B&Q