This page lists 7 cooling system parts for the 2011 Honda Pilot, across 2 part types, covering the 3.5L V6 engine. Every part shows its brand, manufacturer part number and fitment notes.
The cooling system system on the 2011 Honda Pilot keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses. All 7 listed parts are Coolant Hose / Pipe Seal (5 parts) and Coolant Reservoir (2 parts).
Every part on this page is matched to the 3.5L V6 — the only engine offered in the 2011 Honda Pilot.
The most listed brands for 2011 Honda Pilot cooling system parts are AJUSA (2 parts), MAHLE / CLEVITE (1 part) and FEL-PRO (1 part), plus 3 more brands.
1 part on this 2011 Honda Pilot page carries a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — MAHLE / CLEVITE C32870 (Coolant Hose / Pipe Seal). Click any part number to see every vehicle that part fits.
Coolant Hose / Pipe Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MAHLE / CLEVITE Popular | C32870 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Engine Coolant Outlet O-RingMolded Rubber | View on Amazon |
| AJUSA | 16022400 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | COOLANT PIPE | View on Amazon |
| AJUSA | 16022450 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| FEL-PRO | ES72774 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | EGR Valve Gasket(s) IncludedSet | View on Amazon |
| VICTOR REINZ | 411076700 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | O-Ring | View on Amazon |
This table covers the seals at the Coolant Hose / Pipe. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again.
5 Coolant Hose / Pipe Seal parts are listed for the 2011 Honda Pilot, from AJUSA, MAHLE / CLEVITE, FEL-PRO and 1 other brand. MAHLE / CLEVITE C32870 carries the "Popular" badge.
Listed part numbers: MAHLE / CLEVITE C32870, AJUSA 16022400 and AJUSA 16022450, plus the other parts above.
Coolant Reservoir
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN | 603287 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| TECHPRO | HO3014129 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the overflow / expansion tanks that hold extra coolant.
2 Coolant Reservoir parts are listed for the 2011 Honda Pilot, from DORMAN and TECHPRO.
This group includes DORMAN 603287 and TECHPRO HO3014129.
Buying Cooling System Parts for a 2011 Honda Pilot
On this vehicle, the cooling system system keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses.
- Confirm you have the 3.5L V6 engine — every part on this page is matched to it.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, replace the thermostat and refill with fresh coolant whenever you change a water pump or radiator; original hoses on an older vehicle are on borrowed time.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Coolant Hose / Pipe Seal and Coolant Reservoir .
Frequently Asked Questions
How many cooling system parts fit the 2011 Honda Pilot?
Our catalog currently lists 7 cooling system parts for the 2011 Honda Pilot across 2 subcategories and 6 brands, covering the 3.5L V6 engine. Each part is matched to the engine(s) it fits.
What are the signs of cooling system problems on a 2011 Honda Pilot?
Common symptoms include a rising temperature gauge in traffic, sweet-smelling steam, crusty deposits around hose clamps, or a heater that blows cold. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, replace the thermostat and refill with fresh coolant whenever you change a water pump or radiator; original hoses on an older vehicle are on borrowed time.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2011 Honda Pilot was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 2011 Honda Pilot?
Every part on this page is matched to the 3.5L V6 engine. Then replace coolant with the exact specification the manufacturer calls for — mixing chemistries can gel and block small passages. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2011 Honda Pilot
Cooling System Parts for Other Honda Pilot Years
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Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.