Toyota Sienna 2000-06

Heater and/or Evaporator Unit

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Removal & Installation



  1. Disconnect the negative battery cable.
  2.  
  3. Drain the cooling system into a clean container for reuse.
  4.  
  5. Disconnect the heater hoses from the rear heater core.
  6.  
  7. Remove the front seats.
  8.  
  9. Remove the front door scuff plates.
  10.  
  11. Remove the cowl side trim.
  12.  
  13. Remove the rear door scuff plates.
  14.  
  15. Remove the lower door scuff plates.
  16.  
  17. Remove the rear console box.
  18.  
  19. Remove the left side air outlet grille.
  20.  
  21. Pull the carpet rearward.
  22.  
  23. Remove the 3 clips and the air outlet grille.
  24.  
  25. Remove the rear air duct 2 bolts, 2 clips and the duct.
  26.  
  27. Disconnect the electrical connectors.
  28.  
  29. Remove the 3 rear heater housing bolts and the housing.
  30.  
  31. Remove both heater core-to-heater housing screws and clamps.
  32.  
  33. Remove the heater core-to-heater housing screw and plate.
  34.  
  35. Remove the heater core.
  36.  


    Click image to see an enlarged view

    Fig. Exploded view of the rear heater core, the rear heater housing and related components


To install:

  1. Install the heater core.
  2.  
  3. Install the heater core-to-heater housing screw and plate.
  4.  
  5. Install both heater core-to-heater housing screws and clamps.
  6.  
  7. Install the rear heater housing and the 3 housing bolts.
  8.  
  9. Connect the electrical connectors.
  10.  
  11. Install the rear air duct and the 2 bolts and 2 clips.
  12.  
  13. Install the 3 clips and the air outlet grille.
  14.  
  15. Move the carpet forward.
  16.  
  17. Install the left side air outlet grille.
  18.  
  19. Install the rear console box.
  20.  
  21. Install the lower door scuff plates.
  22.  
  23. Install the rear door scuff plates.
  24.  
  25. Install the cowl side trim.
  26.  
  27. Install the front door scuff plates.
  28.  
  29. Install the front seats.
  30.  
  31. Connect the heater hoses to the rear heater core.
  32.  
  33. Refill the cooling system.
  34.  
  35. Connect the negative battery cable.
  36.  

 
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