Nissan Repair: 2004 Maxima Timing Belt, double overhead cam, cam engine

Question
When should the timing belt/chain be replaced and how much should this typically cost?  The dealer is not giving me straight forward answers and I honestly don't trust them. Thanks.  

Answer
Jon,

Drive the car until it starts making noise.  Basically, you are looking at something like 200,000 miles or greater since it has a chain.  I don't blame you on the dealership and the service advisors.  But, the VQ engine has evolved from a single overhead cam engine that had a timing belt to a double overhead cam engine with a chain.  It is pretty much bulletproof other than normal maintenance.  The wife has 130,000 miles on hers and it is still running strong.