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Product Details
The Honda OEM Thermostat Assembly is a genuine factory replacement designed for select Honda and Acura K20 and K24 engines, including the 2002-2005 Honda Civic Si, 2002-2006 Acura RSX, and 2002-2006 Honda CR-V.
This thermostat regulates coolant flow between the engine and radiator, helping the engine reach its proper operating temperature and maintain consistent cooling system performance.
Over time, thermostats can become stuck open or closed, causing slow engine warm-up, fluctuating coolant temperatures, or overheating. Manufactured to Honda's original equipment specifications, this thermostat assembly provides factory-quality fitment and dependable temperature regulation.
Features
- Genuine Honda OEM Part: Factory-quality construction and precise fitment.
- Complete Thermostat Assembly: Includes the thermostat, integrated housing, and sealing gasket.
- Regulates Coolant Flow: Helps maintain proper engine operating temperatures.
- Prevents Overheating: Supports efficient cooling system operation.
- Proper Engine Warm-Up: Helps the engine reach its designed operating temperature.
- Direct Factory Replacement: Designed for compatible K-Series engine applications.
- Ideal for Cooling System Repairs: Recommended during thermostat replacement, engine servicing, or cooling system maintenance.
- OEM Part Number: 19301-PNA-003.
Additional Information
- Manufacturer: Honda / Acura
- Part Number: 19301-PNA-003
- OEM Description: Thermostat Assembly (Nippon Thermostat)
- Product Type: Engine Coolant Thermostat
- Application: Select K20 / K24 Engines
- Installation Location: Engine Cooling System / Thermostat Housing
- Includes: Thermostat, Housing, and Gasket
- Quantity: Sold Individually
Installation Notes
- Always allow the engine to cool completely before servicing the cooling system. Drain the coolant to the appropriate level, remove the original thermostat assembly, and clean the mating surfaces before installation.
- Inspect the surrounding coolant hoses and connections for wear or damage. After installation, refill the cooling system with Honda-compatible coolant and properly bleed trapped air.
Note:
- Includes one genuine Honda thermostat assembly with housing and gasket. Coolant, hoses, mounting hardware, and additional cooling system components are sold separately.
For K20/K24 hybrid builds or custom engine swaps, verify thermostat housing and coolant hose compatibility before ordering.
| Part Number: | 19301-PNA-003 |
| Brand: | Honda |
WARNING: This product may contain chemicals known to the State of California to cause cancer or birth defects. www.P65Warnings.ca.gov.
Vehicle Fitment
| Year | Make | Model | Trim |
|---|---|---|---|
| 2002 | Acura | RSX | Base |
| 2002 | Acura | RSX | Type-S |
| 2002 | Honda | CR-V | EX |
| 2002 | Honda | CR-V | LX |
| 2002 | Honda | Civic | Si |
| 2003 | Acura | RSX | Base |
| 2003 | Acura | RSX | Type-S |
| 2003 | Honda | CR-V | EX |
| 2003 | Honda | CR-V | LX |
| 2003 | Honda | Civic | Si |
| 2004 | Acura | RSX | Base |
| 2004 | Acura | RSX | Type-S |
| 2004 | Honda | CR-V | EX |
| 2004 | Honda | CR-V | LX |
| 2004 | Honda | Civic | Si |
| 2005 | Acura | RSX | Base |
| 2005 | Acura | RSX | Type-S |
| 2005 | Honda | CR-V | EX |
| 2005 | Honda | CR-V | LX |
| 2005 | Honda | CR-V | SE |
| 2005 | Honda | Civic | Si |
| 2006 | Acura | RSX | Base |
| 2006 | Acura | RSX | Type-S |
| 2006 | Honda | CR-V | EX |
| 2006 | Honda | CR-V | LX |
| 2006 | Honda | CR-V | SE |
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