[RiotGrip]

I have no concrete numbers, but maybe I can help a little.

My educated guess is that 1 to 5% of IS-Fs have the PCS/radar cruise. I would say that you will find that option primarily only on a 2008. My reason for this answer is that most IS-Fs came with a set option package depending on the region they were initially delivered, to my knowledge the PCS/Radar cruise was not part of any of those option packages. Given this, it is likely that nearly every PCS/Radar cruise was a special order car. Also, the PCS/Radar cost almost $3000 as an option on a new IS-F. From the very small number of IS-Fs I've seen with PCS/RC, it really doesn't add much to the resale value(good if you buy it used).

I myself have a Red IS-F with Alpine white leather and PCS/Radar, I have speculated that it is a rare combo, but I have no data to back it up. The radar cruise is a great option if you travel a lot on open highways, if traffic is heavy the system is less usefull.

For the 2009 and 2010 IS-Fs I'd guess the PCS/Radar cruise was special order only and you won't see many with that option. Also the production numbers in general for 2009 and 2010 are much lower than 2008 on the IS-F. Hope this sheds some light on the subject.

 

[RiotGrip]

Do you have any numbers on how many were manufactured (for the USA) in 2009 and 2010? I have read that 1700 were shipped to the USA for 2008.

Did you special order your IS-F?

No, I didn't special order my IS-F. I bought it used with 6000 miles, and it was originally driven by a lexus factory rep(not a dealer) in California. I was primarily looking for an IS-F with the white interior, and mine just happened to have the PCS/Radar cruise--it was a nice find.
As far as production numbers, sometime between 11/08 and 3/09, the 2009 IS-F went to special order only so there are a lot less examples. For 2010, there are new models in dealerships, but production is still probably less than the original 2008 run. Hopefully one of the dealers that post on this site can provide some actual numbers, because most of what I'm telling you I've read here and elsewhere about the car.