LurfysMa wrote:

>>For a 1994 Lexus LS 400, standard brake pad thickness is 11 mm
>>for front brakes, and 10 mm for rear brakes.
>
>
> It's a 1999, but probably the same values, right?

My guess is that you can give or take 1 mm. The maximum
thickness depends on the material physics of the break pads.
I assume that much thicker pads would have problems with either
heat transfer or physical durability, or both.

> Is there someplace online where you looked that up?

No. I looked from the repair manuals, which I only have for
the 1994 model.