FLEXUS K

Hi guys does anybody know the correct denso lambda sensor for a IS200 sport year 2000?(direct fit) i have the fault code P0135 bank 1 sensor 1 after looking online and the denso website there seems to be more than one sensor which will fit🤔 DOX-0231 DOX-0205 DOX-0236 is listed for is300 but matches my car reg when I search?? Are the old ones hard to remove if yeah any good tips? Thanks Karl