You have a few options:

1) Check this tool out... Not sure if compatible with your 4GS but PM the guy
https://www.clublexus.com/forums/clu...s-at-home.html

2) If you are willing to live with the Warning lights, perhaps you are ok with the TPMS in a cannister trick. Just some advice if you go this route - foam padding and dont cheap out on the canister. It will be pressurized and a rattler if not properly insulated.
http://www.tundratalk.net/forums/tun...pipe-bomb.html

Good luck!

 

That is pretty interesting, but if I decided to keep the 20s without tpms, the tpms would just be left in my stock wheels. If I was going to take them out of the stock wheels, then I would just place them in my 20s. This is interesting none the less!

 

^^ True but, was not sure if you were anticipating swapping wheels often. I am in Canada and have two sets - summer and winter. Swapping and having to put up with the warning light is not an option for me. TPMS in the winter wheels will cost over $600 once programmed by Lexus. I have a 2IS and lack of the TMPS takes over the information display with "Check System", the giant red exclamation triangle turns ON and the TPMS low pressure light turns ON. Thats too many colored lights for me.

 

I had purchased some custom ISSForged 3pc wheels from WheelsPerformance out of Miami, FL and they were able to get some OEM TPMS sensors that worked when I got them programmed to get rid of that low pressure sensor light when switching out the OEM wheels/tires. I don't recall the individual prices, as it was a pkg deal when I ordered the wheels/tires. Here's their contact information and just ask for Rick (Mgr) there and he will take good care of you:


"Customizing the world's finest and fastest automobiles"
1-888-23-WHEEL(94335) or 1-305-326-3324




____________________
2013 GS350 F-Sport: Starfire Pearl/Cabernet Red | NAV | ML Audio | HUD | BSMS | IPA | DHS.DRS | Remote Engine Start | ISSForged FM10R Gloss Black/Polished 20"x9" +38 & 20"x10.5" +45 | Nitto NT555 245/35R20 & 275/30R20 | Swift Springs | Prestigious Society NAV Override | JDM Fog Light Kit w/Hoen Endurance Yellow Bulbs

 

I work for Costco and maybe able to help you guys looking for Sensors.. Aftermarket sensors by Dill start at about $65 installed and I can clear TPMS lights. PM me and Ill see if I can help you. Im in Los Angeles btw.