INFINITI G20 1999-2002. INFINITI I30 1996-1999. INFINITI J30 1995-1997. INFINITI Q45 1996-2001. INFINITI QX4 1997-2003. Contents SENSOR. Location: The AAT sensor used as an ambient temperature sensor may be located behind the front grill or bumper fascia or inside one of the front fenders.