Download IF YOU CONFIRM: There is a buzzing / whining noise coming from one or both secondary timing chain / camshaft sprocket areas. The noise may increase with engine speed (RPM). ACTION: 1. Replace both secondary timing chains and both secondary timing chain tensioners with the ones from the Parts Information section of this bulletin. 2. Change the engine oil and filter. (1) Reference the Parts Information Table and use the applicable Secondary Timing Chain P/N as the PFP. (2) Reference the current Nissan Warranty Flate Rate Manual and use the indicated FRT.