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Gates 18476 HVAC Heater Hose - Auxiliary Heater Pipe-3 To Auxiliary Heater Pipe-4
| Brand | Gates 18476 |
|---|---|
| Position | Auxiliary Heater Pipe-3 To Auxiliary Heater Pipe-4 |
| 0 | |
| Yes | |
| Branch Quantity | 0 |
| Centerline Length | 14.6 |
| Centerline Length | 371 |
| Centerline Length (in) | 14.6 |
| Centerline Length (mm) | 371 |
| End 1 Inside Diameter | .5 |
| End 1 Inside Diameter | 13 |
| End 2 Inside Diameter | .63 |
| End 2 Inside Diameter | 16 |
| Material | EPDM |
| Molded | Yes |
| Number of Quick Connect Fittings | 0 |
| Product line | Molded Heater Hose |
| Fits | Toyota · 3 vehicles |
OEM-style molded hose. Factory-molded for a precise fit and cleaner routing.
EPDM construction. Built from durable material for coolant, water, and air use.
Approved for marine applications.
Cross-references CSF 10476, Davico Mfg 18476 and 14433S for the same application. See all 5.
Gates Molded Heater Hose for Toyota Sienna
Gates Part Number 18476 is a molded heater hose built for tight engine compartments where a straight hose will not route correctly. It is an OEM-style coolant hose formed to match the application on 2004-2006 Toyota Sienna models at the auxiliary heater pipe connection.
Key Features
- Factory-molded shape for accurate routing in compact engine bays
- EPDM construction for coolant, water, and air service
- Small I.D. hose design with 0.5 in. (13 mm) end 1 and 0.63 in. (16 mm) end 2
- Centerline length of 14.6 in. (371 mm)
- Approved for marine applications
- OE-style replacement for the Gates Molded Heater Hose line
Detailed Description
This Gates molded coolant hose is part of the Molded Heater Hose product line, which focuses on factory-formed routing for vehicles with limited clearance. Part Number 18476 is shaped to follow the original hose path on the Toyota Sienna, helping maintain proper coolant flow between the auxiliary heater pipe-3 and auxiliary heater pipe-4 connection points. This part cross-references Davico Mfg 18476 for the same application.
Compatible With 2004-2006 Toyota Sienna, Auxiliary Heater Pipe-3 To Auxiliary Heater Pipe-4. Use Gates 18476 when replacing a molded heater hose that must match the original bend profile and small inside diameter requirements of the vehicle’s HVAC coolant circuit.
Common Replacement Issues
- Cracked or hardened heater hose material
- Coolant seepage at a molded hose bend
- Poor routing from a hose that no longer holds its formed shape
- Restricted heater circuit flow caused by hose deterioration
- Fitment problems when a universal hose does not match the original contour
Installation Notes and Tips
Verify the hose routing, end diameters, and centerline length against the removed part before installation. Confirm the connection points on the 2004-2006 Toyota Sienna auxiliary heater pipe assembly and inspect adjoining clamps, pipes, and sealing surfaces for wear or corrosion. Proper alignment of the molded shape is important for clearance in tight engine compartments.
Quality Assurance
Gates manufactures this hose as an OEM-style molded replacement using EPDM material for coolant-system service. The design is intended to match the original application geometry for the Toyota Sienna heater circuit and support reliable fitment when the correct part number 18476 is selected.
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2006 | Toyota | Sienna | 3.3L | V6 | GAS | Auxiliary Heater Pipe-3 To Auxiliary Heater Pipe-4 | Molded Heater Hose |
| 2005 | Toyota | Sienna | 3.3L | V6 | GAS | Auxiliary Heater Pipe-3 To Auxiliary Heater Pipe-4 | Molded Heater Hose |
| 2004 | Toyota | Sienna | 3.3L | V6 | GAS | Auxiliary Heater Pipe-3 To Auxiliary Heater Pipe-4 | Molded Heater Hose |
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