I fitted an drivers seat base from exmoor trim two years ago. At the time I was incredibly happy with it and it made a huge difference over the old one. However, I am wondering if it is coming to the end of its life and needs replacing again. Although it is only 2 years old it has done about 50k miles including a very bouncy trip around Morocco, and I am not a small individual (about 115kg). What would people expect the life span of a standard defender seat base to be, 2 years sounds fairly low, but 50k miles may be fairly reasonable when you consider the age of the design!