Hi, I have got P0031 HO2s heater control circuit low, bank 1 sensor 1 problem ,just looked for other posts and found a good one, but it was for a 2007 model IS, mine is the 2009 model,55k mileage the part he used Denso 234-9051 does not fit on my car. Does any one know the part number I need, I want to use a Denso sensor. Thanks, this is my first post, also do not really want to have to get it from USA thanks for any help.