Accessory Drive Belt Idler Pulley. Idler / Tensioner Pulley. 1999 Nissan Frontier Engine: 3.3L V6; Position: Air Conditioning;. 2000 Nissan Frontier Engine: 3.3L V6; Position: Air Conditioning;. 2001 Nissan Frontier Engine: 3.3L V6; Position: Air Conditioning;.