OEM 2007 Toyota Highlander Heater Core

2007 Toyota Highlander Parts Questions & Experts Answers

• Q: How to remove and install the Heater Core on 2007 Toyota Highlander?

  A: The operation to replace the rear heater starts with removal of the deck board number two sub-assembly and rear floor finish plate along with the back door Weather Strip followed by the deck side trim box right-hand side and rear door scuff plate right-hand side and rear door opening trim Weather Strip right-hand side and deck side trim cover right-hand side followed by the deck trim side panel right-hand side. Begin by sliding off the heater water outlet hose clip with pliers while gripping its claws before handling the heater water pipes to avoid deformation and providing a drain pan or cloth to catch any cooling water leaks. Remove the heater water inlet hose through the same process. Remove the foot air duct rear by disconnecting the wire harness clamp and taking out both clip attachments before you remove air duct rear No.5. The procedure for removing the rear heater assembly includes disconnecting the washer hose clamp and removing 4 bolts and a plate and then removing the heater relay No.1 clamp and heater blower resistor connector followed by extracting the assembly with its 4 bolts. Installation begins with screwing in the rear heater assembly using its 4 bolts while tightening them to 9.8 N.m (100 kgf.cm, 87 in.lbf) torque value in sequence and then installing the heater blower resistor connector followed by heater relay No.1 and washer hose and the plate with 4 bolts at the same torque. The installation process starts with air duct rear No.5 and continues with foot air duct rear along with heater water inlet hose and heater water outlet hose and then includes deck trim side panel assembly RH followed by deck side trim cover RH and deck side trim cover front LH with rear door opening trim Weather Strip RH and rear door scuff plate RH to finish with the installation of deck side trim box RH before putting back door Weather Strip and rear floor finish plate then completing with the deck board sub-assembly No.2.