Nissan Xterra loud chatter noise from under air intake manifold despite replacing tensioner and idler pulleys on Nissan Xterra

Some Nissan Xterra owners report experiencing a loud chatter noise from under the air intake manifold even after replacing tensioner and idler pulleys. This issue may be caused by cracked rubber couplers connecting the intake tube to the throttle body and air box, particularly if there is a crack on the throttle body coupler. Additionally, some owners find that a rattling noise can be related to the VIAS (Variable Intake Air System) valve, which may be resolved by disconnecting the associated line when the valve is open and vibrating due to turbulent air. Furthermore, regular maintenance checks for worn-out parts, including brake lines and wheel bearings, are crucial to prevent unusual noises and maintain optimal vehicle performance. If the chatter persists, consulting a qualified mechanic or Nissan dealership is advisable for a thorough diagnosis and resolution.