Some Nissan Altima owners report experiencing jerking forward and delayed engagement when shifting into Drive or Reverse. These issues are often attributed to a misfiring engine, commonly caused by problems with spark plugs or coil packs. Additionally, some owners have noted that delayed engagement may indicate potential issues with the CVT transmission. In more severe cases, if the Altima shifts into gear but fails to move, it could point to significant internal transmission problems, including issues with gears or the clutch system. Jerking during braking has also been reported, which may stem from faulty brake rotors, brake pads, or bad wheel bearings, particularly if the vehicle has not been used frequently. Furthermore, some owners find it necessary to check for looseness in the front wheels due to worn suspension parts if other causes have been eliminated. Addressing these concerns promptly is crucial to ensure a smoother driving experience and to prevent further complications with the vehicle's transmission or braking systems.