pipes to deteriorate we have had this on both petrol and diesel models
for a car 13 years old its quite normal rubber has shelf life of 5 years and should be replaced if any deteration is visable
the 2.2dti and B series also have pipes deterioting and they are a lot younger
rubber pipes need checking as part of service especially on chassis
weather sunlight and tempeture all have an effect on the performance of rubber



