My BMW X3 automatic has covered 38,000 miles from new in my ownership and recently had an inspection and brake fluid change at Sytner High Wycombe. The service received and the ongoing communication throughout the day was first class but I was surprised to hear that the car needed both front brake pads and discs. Surely the idea is that the pads wear out and are replaced and the discs don't, or is this old fashioned thinking on my part?