I just went to a bay area Land Rover dealer to check my brake on my '07 RRS because it has squeak noise when I brake. The dealer says that I should replace my front brake pads/rotor as they are now about 1-2 mm. And it costs about $735. However, last month I just went for a 45000 miles inspection and it said that my brake pads are 5mm for both front and rear. My questions: Is it possible that my front brake pads' mm reduces that fast? Also, the dealer stated that my rear brake pads are now 7mm. How come it can change from 5 mm to 7 mm? Is there any other possible problem due to the squeak noise? What should I do? Thank you very much.