replacing brake pads on 2007 Lexus RX350

my back brakes need to be replaced. how much will this cost

3 answers
Does the Lexus RX350 have a timing belt that should be changed? I couldn't find it listed within their maintenance lists.
You can get this estimate and any others at and find a shop here
If you do the job yourself it will cost you $40. If you take it to a shop $200+ and to a Lexus dealer over $300.