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Just type in Lexus TIS on eBay. Any of the cheap ones should work. The legit mongoose is $$$. A forum search should bring up some info for you, I've seen this discussed before.
I am using version 8.10 or something. Beware the cheap cables online will not be anywhere near perfect, causing connection losses and access issues to certain ECUs on the car.
Access to the engine parameters are hit and miss with a cheap cable.
I was able to reprogram a key but can't access Engine ECU live data...
Yep this is what I mean. I have the cheap cable and cannot access the Engine parameters at all. Everything else works but sometimes I have to close the program and reopen.