What is the expected life of the engine mount (#4) or what is the recommended mileage to replace it?

Keep in mind that it's a 10/03 2004 MCS so it doesn't have the oil-filled mount; it's all rubber.

I'm replacing a bunch of bushings and mounts and want to make sure I don't leave anything behind that's going to wear out soon after all the work.

 

I'm interested as well (9/03 build).

 

Mine lasted to about 90K, till I noticed it starting to rip. By 100K, What happened is it cut a cone out of the upper part of the mount around the upper bolt. My build is 07/03.

 

Mine is still good, of course with the powerflex inserts the stress is greatly reduced so life should be extended.