2018 TOYOTA SIENNA PROBLEMS

Common Complaints and Reliability

• 1. Acceleration/Transmission Issues:

  • Even to go on a small uphill slope, the vehicle struggles to accelerate
    
  • Maintaining speed over 65 mph on highways requires pressing hard on the gas pedal
    
  • Delay in downshifting when throttle is pressed
    
  • Hesitation and delay in acceleration, causing safety concerns
    

• 2. Power Seats Malfunction:

  • 3rd-row power seats are malfunctioning, operating while the vehicle is in motion
    
  • 3rd-row seating passenger side cup holders and side panel get hot during driving
    

• 3. Miscellaneous Electrical/Mechanical Issues:

  • Tire pressure warning light always on
    
  • Car stalled, sputtered, and died due to fuel pump failure
    
  • Driver side automatic sliding door won't stay open
    
  • Sunroof exploded while driving
    
  • Safety Connect system not functioning properly
    
  • Recall-related issues affecting registration renewal
    
  • Seats in the third row have excessive movement, potential safety concern
    
  • Instrument panel hard to read, causing safety concerns
    
  • Speed deceleration issue due to faulty software update
    
  • Vibration on front brakes when driving downhill
    
  • Defective fuel line rupture causing fuel leak
    
  • AC hose clogged, leading to mold growth in the vehicle
    
  • PCS system stopping the van abruptly with no warning
    
  • Tires wearing down unevenly, alignment issue
    
  • Defective Bridgestone tires showing severe wear
    
  • Defective buckle handle and harness connection in car seat
    
  • Front passenger side bumper issue due to air flow
    
  • Carpet near accelerator and brake pedals is loose and interfering
    
  • Low oil warning light illuminating due to oil leak
    
  • Unintended acceleration while reversing vehicle
    
  • Safety recall notice for fuel pump, not replaced due to conversion by a mobility company
    
  • Hesitation in acceleration from a stop or at speed, suspected fuel filter issue
    
  • Airbag deployment causing light coverings to come off and scratch occupants