Recently noticed occasional drip mark on drivers side of car,set about finding cause and have found this hose is rock hard,obviously allowing liquid through otherwise it wouldnt leak & obviously previous keeper had a similar issue with it as the jubi clips are new,im guesing theyve stopped it for a while but hose is continuing to deteriorate. So before it falls in half i want to replace but want to be sure i get correct hose,so part no. and part name would be great,any help appreciated.