OE Quality
60-Day Returns

Dorman 603-809 Engine Coolant Reservoir - Front
Overview of Dorman Engine Coolant Reservoir for Honda Civic
The Dorman 603-809 engine coolant reservoir is designed specifically for Honda Civic models, providing a reliable replacement for your vehicle's cooling system. Made from durable plastic with a white finish, this reservoir includes a cap and mounting brackets for straightforward installation.
- Constructed from durable plastic material
- White color for easy fluid level monitoring
- Includes one mounting bracket and one mounting hole
- Cap included with the reservoir for secure sealing
- Non-pressurized design suitable for Honda Civic cooling systems
Detailed Product Description
The Dorman 603-809 engine coolant reservoir is engineered to meet the specifications of Honda Civic vehicles. Its plastic construction ensures resistance to corrosion and heat, while the white color allows for quick visual checks of coolant levels. This reservoir comes with one mounting bracket and a single mounting hole, facilitating a secure fit in the engine bay. The included cap is designed to seal the reservoir properly, preventing coolant loss and contamination. As a non-pressurized reservoir, it works seamlessly with the existing cooling system components of the Honda Civic.
Common Applications and Problem Resolution
- Replacement for cracked or leaking coolant reservoirs
- Solves coolant overflow issues due to damaged tanks
- Prevents engine overheating caused by coolant loss
- Restores proper coolant level monitoring
- Addresses mounting bracket failures or missing hardware
Installation Notes and Tips
Installation of the Dorman 603-809 reservoir is straightforward with the included mounting bracket. Ensure the old reservoir is fully drained before removal to avoid spills. Verify the mounting hole alignment on your Honda Civic before securing the new reservoir. The included cap should be tightened securely to maintain system integrity. No additional mounting hardware is included, so retain any reusable components from the original reservoir if necessary.
Quality Assurance and Warranty Information
Dorman parts are manufactured to meet or exceed OEM standards, ensuring compatibility and durability. The 603-809 engine coolant reservoir undergoes quality checks to maintain performance reliability. Please refer to Dorman's warranty policy for specific coverage details related to this part.
| Brand | Dorman |
| Part Number | 603-809 |
| Cap Included | Yes |
| Cap Type | Yes |
| Color | White |
| Material | Plastic |
| Mounting Brackets Included | Yes |
| Mounting Hardware Included | No |
| Mounting Hole Quantity | 1 |
| Package Contents | 1 Coolant Reservoir; 1 Cap |
| Pressurized | No |
This part fits 25 vehicles. Search below:
| Year | Make | Model | Submodel | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2005 | Honda | Civic | LX | 1.7L | L4 | Front | |
| 2005 | Honda | Civic | LX Special Edition | 1.7L | L4 | Front | |
| 2005 | Honda | Civic | EX | 1.7L | L4 | Front | |
| 2005 | Honda | Civic | EX Special Edition | 1.7L | L4 | Front | |
| 2005 | Honda | Civic | GX | 1.7L | L4 | Front | |
| 2005 | Honda | Civic | DX | 1.7L | L4 | Front | |
| 2005 | Honda | Civic | Value Package | 1.7L | L4 | Front | |
| 2005 | Honda | Civic | HX | 1.7L | L4 | Front | |
| 2004 | Honda | Civic | LX | 1.7L | L4 | Front | |
| 2004 | Honda | Civic | EX | 1.7L | L4 | Front | |
| 2004 | Honda | Civic | GX | 1.7L | L4 | Front | |
| 2004 | Honda | Civic | DX | 1.7L | L4 | Front | |
| 2004 | Honda | Civic | Value Package | 1.7L | L4 | Front | |
| 2004 | Honda | Civic | HX | 1.7L | L4 | Front | |
| 2003 | Honda | Civic | LX | 1.7L | L4 | Front | |
| 2003 | Honda | Civic | EX | 1.7L | L4 | Front | |
| 2003 | Honda | Civic | GX | 1.7L | L4 | Front | |
| 2003 | Honda | Civic | DX | 1.7L | L4 | Front | |
| 2003 | Honda | Civic | HX | 1.7L | L4 | Front | |
| 2002 | Honda | Civic | LX | 1.7L | L4 | Front | |
| 2002 | Honda | Civic | EX | 1.7L | L4 | Front | |
| 2002 | Honda | Civic | GX | 1.7L | L4 | Front | |
| 2002 | Honda | Civic | DX | 1.7L | L4 | Front | |
| 2002 | Honda | Civic | HX | 1.7L | L4 | Front | |
| 2001 | Honda | Civic | 1.7L | L4 | Front |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.