Lithium CR1632 (2008). I just replaced mine and got it from the dealer.
The 2008 Lexus IS-F's turning circle is 33.5 ft..
The 2008 Lexus IS-250's turning circle is 33.5 ft..
The 2008 Lexus IS-350's turning circle is 33.5 ft..
The 2008 Lexus GS-450H's turning circle is 36.7 ft..
The 2008 Lexus LX-570's turning circle is 38.7 ft..
The 2008 Lexus LS-460's turning circle is 35.4 ft..
The 2008 Lexus ES-350's turning circle is 36.7 ft..
The 2008 Lexus RX-350's turning circle is 37.4 ft..
The 2008 Lexus LS-600H-L's turning circle is 39.4 ft..
The following models are affected: 07-09 LS460 AND LS460L, 07-09 GS350 AND GS450H, 2008 GS460, 2008 LS600HL, 2006-2008 IS350.
The 2008 Honda Ridgeline's turning circle is 42.6 ft..