OE Quality
60-Day Returns

Dorman 603-566 Engine Coolant Reservoir - Front
Overview of Dorman Engine Coolant Reservoir for Toyota RAV4
The Dorman 603-566 engine coolant reservoir is designed specifically for Toyota RAV4 models, providing a reliable replacement for your vehicle's cooling system. Made from durable plastic with a white finish, this reservoir includes a flip-top cap and necessary tubing to ensure proper coolant containment and flow.
- Constructed from durable plastic material for long-lasting use
- White color for easy coolant level visibility
- Includes flip-top cap for secure sealing and easy access
- Cap included with the reservoir for a complete replacement
- Comes with tubing to facilitate proper coolant circulation
- Non-pressurized design suitable for Toyota RAV4 cooling systems
- Compatible with Toyota RAV4 models requiring part number 603-566
Detailed Product Description
The Dorman 603-566 engine coolant reservoir is engineered to meet the specifications of Toyota RAV4 vehicles. Its plastic construction offers resistance to corrosion and heat, ensuring consistent performance under engine operating conditions. The white reservoir allows for quick visual inspection of coolant levels without removing the cap. The included flip-top cap provides a secure seal to prevent leaks while allowing easy access for refilling or maintenance. This reservoir is non-pressurized, matching the original equipment design for proper system function. Additionally, the package includes tubing to connect the reservoir to the cooling system, facilitating efficient coolant flow.
Common Applications and Issues Addressed
- Replacement of cracked or leaking coolant reservoirs in Toyota RAV4
- Resolving coolant overflow or underfill problems
- Addressing coolant contamination due to damaged caps or reservoirs
- Fixing coolant system pressure inconsistencies caused by faulty reservoirs
- Maintaining proper coolant levels to prevent engine overheating
Installation Notes and Tips
Installation of the Dorman 603-566 engine coolant reservoir is straightforward for technicians familiar with Toyota RAV4 cooling systems. Since mounting hardware and brackets are not included, reuse existing components or source compatible hardware as needed. Ensure the flip-top cap is securely fastened after installation to prevent leaks. Verify all tubing connections are tight and free of damage. It is recommended to inspect the entire cooling system during installation to identify any additional worn components.
Quality Assurance and Warranty
Dorman parts are manufactured to meet or exceed OEM standards, ensuring reliable fit and function for Toyota RAV4 vehicles. The 603-566 engine coolant reservoir undergoes quality checks to maintain durability and performance. While specific warranty details are not provided here, Dorman typically offers limited warranties on their replacement parts. Consult product documentation or the manufacturer for exact warranty terms.
| Brand | Dorman |
| Part Number | 603-566 |
| Cap Included | Yes |
| Cap Type | Flip Top |
| Color | White |
| Material | Plastic |
| Mounting Brackets Included | No |
| Mounting Hardware Included | No |
| Mounting Hole Quantity | 0 |
| Package Contents | 1 Coolant Reservoir; 1 Cap; Tubing |
| Pressurized | No |
This part fits 8 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2005 | Toyota | RAV4 | 2.4L | L4 | Front | ||
| 2004 | Toyota | RAV4 | 2.4L | L4 | Front | ||
| 2003 | Toyota | RAV4 | 2.0L | L4 | GAS | Front | |
| 2003 | Toyota | RAV4 | ELECTRIC | Front | |||
| 2002 | Toyota | RAV4 | 2.0L | L4 | GAS | Front | |
| 2002 | Toyota | RAV4 | ELECTRIC | Front | |||
| 2001 | Toyota | RAV4 | 2.0L | L4 | GAS | Front | |
| 2001 | Toyota | RAV4 | ELECTRIC | 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.