Is the Intake Manifold part of the Drivetrain Warranty?

Yes. Powertrain Coverage is 60 months / 60,000 miles. 2016 Nissan | Warranty Information Booklet

Nissan Powertrain Warranty Coverage

While Nissan vehicles are recognized for their long-lasting durability, the Nissan Powertrain Warranty provides additional peace of mind. The following parts are covered under our limited powertrain coverage:

Engine

• Cylinder Heads, Block, and all Internal Parts
• Rocker Covers
• Oil Pan
• Valve Train and Front Cover
• Timing Chain and Tensioner
• Oil Pump
• Water Pump and Fuel Pump
• Fuel Injectors
• Intake and Exhaust Manifolds
• Turbocharger
• Flywheel
• Seals and Gaskets

Transmission and Transaxle

• Case and All Internal Parts
• Torque Converter and Converter Housing
• Automatic Transmission Control Module
• Transfer Case and all Internal Parts
• Seals and Gaskets
• Clutch Cover and Housing
• A/T Cooler
• Electronic Transmission Controls

Drivetrain

• Drive Shafts
• Final Drive Housing and All Internal Parts
• Propeller Shafts
• Universal Joints
• Bearings
• Seals and Gaskets

Restraint System

• Air bags and Related Electronic Control Systems

Thank you so much for the info.
I have an error code P2004 (Chassis System Control Error pop up and Check engine light also appeared). It's an error about the intake manifold, etc. Do you think this error is covered by the drivetrain warranty? Hope it does.

Probably. Nissan issued a Technical Service Bulletin for it.

Nissan TSB #NTB17-091
2016 Nissan Rogue (and other models)

Summary
2013-2017 ALTIMA AND 2014-2017 ROGUE; MIL ON WITH DTC P2004 STORED IF YOU CONFIRM MIL is ON with P2004 (INTAKE MANIFOLD RUNNER CONTROL VALVE POSITION SENSOR) stored. And There are no drivability issues. ACTION 1. Remove the intake manifold. 2. Replace the intake manifold runner control valve position sensor. 3. Re-install intake manifold.

Thank you so much!