I was changing out the rear pads and rotors and lubricating the caliper slide pins and I noticed none of the slide pins had the rubber bushing.

One pin on each side did have the groove on the pin to fit a bushing but neither had it on.

I am curious if there is supposed to be a bushing for the rear or not?

I have heard some cars didn't have the bushing even though the pin had the groove.

 

I think so as 09 RX350 [JPP] share the same part number with 06 RX330 [JPP]: 47815-48050 , 47814-48050 & 04479-48050

Some photos few years back, sometime the rubber bushing may come off and stay inside when disassembly the caliper.

 

For a 2007 RX 350, does the caliper slide pin with the rubber bushing at the ned go in the top or bottom location?
Manual says bottom, but mine were in the top when disassembled. I took pics. Thanks

 

are you referring to the front or rear? For mine, the rears depending on which side, 1 was top, 1 was bottom. I forget if the front side did the same or not.