Circulate engine coolant between the pipe and thermostat with the Dayco heater hose 86505, a molded direct-fit replacement for the 2003-2009 Toyota 4Runner and the 2005-2010 Toyota Tacoma equipped with the V6-4.0L engine. This pre-formed hvac heater hose is shaped to follow the factory pipe-to-thermostat routing, so it drops into the original path without splicing or reshaping.
A cracked, swollen, or leaking heater hose can weep coolant and let air into the system. If a failed hose in this location is the cause of your coolant loss, this molded replacement restores the original pipe-to-thermostat routing. If you searched for a 4RUNNER heater hose, confirm your engine is the V6-4.0L before ordering.
Interchange: 14643S · 18337 · 10337
This part cross-references / interchanges with the following part numbers:
What is the Dayco 86505 hvac heater hose?
It is a molded coolant hose that routes between the pipe and the thermostat, serving as a direct-fit replacement for the listed Toyota V6-4.0L applications.
Which vehicles does this heater hose fit?
It fits the 2003-2009 Toyota 4Runner and the 2005-2010 Toyota Tacoma with the V6-4.0L engine. Confirm your engine in the Buyer's Guide tab before ordering.
What is the inside diameter of this hose?
Both ends have a .25 in (1/4 in) inside diameter, and the hose has a centerline length of 4.5 in.
Where is this hose located?
It is the molded hose that connects the pipe to the thermostat, following the factory coolant routing in that position.
What are the signs this heater hose may need replacing?
Cracking, swelling, soft or hardened sections, or coolant weeping at the hose are common signs. Diagnose the source of any coolant loss before replacing.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
