I have a 95 ES300. I've already purchased factory pads. At what pad thickness should old ones be replaced?

 

Honestly, when they start squeaking.

 

Bob,

If you are to install the pads, do not take it to lexus dealer. I used to own a 97 ES300 and my dealer charged me $1100 to replace the pads. Of course I refused them but they constantly told me my car is a danger on the road since there is min pads left and wouldn't release my car (took it in for maintenance).