Keep coolant flowing where it belongs with the Dayco Molded Heater Hose (P/N 86826) — a single, custom-molded coolant hose that runs between the filler reservoir and radiator on the 2005-2010 Ford Mustang.
Note: This hose connects the coolant filler reservoir to the radiator — it is not the heater core supply or return hose. Confirm the routing on your vehicle matches this location before purchasing.
Signs this hose may need replacing include visible cracking, softness, or swelling along the hose body; a puddle of coolant under the front of the vehicle; or a dropping coolant level with no obvious source. A failing reservoir-to-radiator hose can disrupt the coolant circuit and lead to overheating — catching it early keeps the cooling system working as designed.
Fits: 2005-2010 Ford Mustang
(V8-4.6L)Replaces / cross-references: Ford OEM references 4R33-8276-AC · 4R3Z-8276-AA
This part cross-references / interchanges with the following part numbers:
What vehicle does this hose fit?
This Dayco molded heater hose (P/N 86826) fits the 2005-2010 Ford Mustang.
What Ford part numbers does this replace?
It replaces Ford OEM references 4R33-8276-AC and 4R3Z-8276-AA.
What are signs this hose may need replacing?
Look for cracks, soft or swollen hose walls, a coolant puddle under the vehicle, or a dropping coolant level. Overheating can follow if the hose fails.
Is this a direct-fit replacement?
Yes — it is molded to fit the 2005-2010 Ford Mustang without cutting or adapting, running from the coolant filler reservoir to the radiator.
What does this hose do?
It carries coolant between the filler reservoir and the radiator, keeping the coolant circuit connected so coolant can flow through that part of the cooling system.
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.
