You can save hundreds of dollars by replacing the pads and rotors yourself. And it only requires a few cheap tools.

"People generally associate pollution from cars as being from exhaust pipes and ... due to friction and wear of the road, tires, and brakes," study lead author Dr. James Parkin said in a statement.

They’re relatively quiet, fit well, and make little to no noise. A small number of owners, however, have experienced cracking with their brake pads. For most cars in everyday conditions, you're not ...