2012 Nissan Altima Owner's Manual - Page 384

SPARK PLUGS 1. Visually inspect the belt for signs of unusual wear, cuts, fraying or looseness. If the belt is in poor condition or is loose, have it replaced or adjusted by a NISSAN dealer. 2. Have the belt checked regularly for condition and tension in accordance with the maintenance schedule found in the "NISSAN Service and Maintenance Guide". WDI0721 SDI1895 VQ35DE engine 1. 2. 3. 4. 5. 6. 7. Power steering fluid pump pulley Idler pulley Generator Air conditioner Idler pulley Crankshaft pulley Drive belt Automatic tensioner REPLACING SPARK PLUGS Platinum-tipped spark plugs A It is not necessary to replace platinum-tipped ᭺ spark plugs as frequently as conventional type spark plugs because they last much longer. Follow the maintenance log shown in the "NISSAN Service and Maintenance Guide". Do not service platinum-tipped spark plugs by cleaning or regapping. ● Always replace spark plugs with recommended or equivalent ones. Maintenance and do-it-yourself 8-19