OE Quality
60-Day Returns

Dorman 603-432 Engine Coolant Reservoir - Front
Reliable Engine Coolant Reservoir for Toyota and Scion Models
The Dorman 603-432 engine coolant reservoir is designed to provide a durable and efficient solution for maintaining proper coolant levels in your vehicle. Specifically compatible with Toyota Echo, xA, and xB models as well as Scion vehicles, this reservoir ensures reliable performance and fitment.
- Constructed from durable brown plastic for long-lasting use
- Includes mounting brackets and a flip-top cap for easy access
- Features three mounting holes for secure installation
- Cap included with a flip-top design for convenient coolant refills
- Non-pressurized reservoir designed to meet OEM specifications
- Package contains one coolant reservoir, one cap, and a fan shroud
Durable Design and Functional Features
The Dorman 603-432 engine coolant reservoir is made from sturdy plastic material in a brown finish, providing resistance to heat and corrosion commonly found in engine compartments. The included mounting brackets and three mounting holes allow for a secure and precise fit in compatible Toyota Echo, xA, and xB models, as well as Scion vehicles. The flip-top cap design simplifies coolant level checks and refills without the need to remove the entire cap assembly. This reservoir is non-pressurized, matching the original equipment specifications to maintain proper coolant system function.
Compatible Vehicles and Applications
This engine coolant reservoir is compatible with the following makes and models:
- Toyota Echo
- Toyota xA
- Toyota xB
- Scion models corresponding to these platforms
It is designed to replace worn or damaged coolant reservoirs that may cause coolant leaks, overheating, or improper coolant level readings.
Common Issues Addressed by This Coolant Reservoir
- Coolant leaks due to cracked or damaged reservoir tanks
- Inaccurate coolant level readings from faulty or missing caps
- Overheating caused by insufficient coolant circulation
- Loose or broken mounting points leading to reservoir movement
- Degraded plastic material from heat exposure over time
Installation Notes and Tips
Installation of the Dorman 603-432 engine coolant reservoir requires basic mechanical skills. Ensure the engine is cool before beginning installation to avoid injury. Use the included mounting brackets and three mounting holes to secure the reservoir firmly in place. The flip-top cap should be checked for proper sealing after installation to prevent leaks. No additional mounting hardware is included, so retain original fasteners or acquire compatible replacements as needed.
Quality Assurance and Warranty Information
Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 603-432 engine coolant reservoir undergoes quality inspections to ensure durability and reliability. While specific warranty details may vary, Dorman typically offers limited warranties covering defects in material and workmanship. Refer to Dorman’s official warranty policy for complete terms.
| Brand | Dorman |
| Part Number | 603-432 |
| Cap Included | Yes |
| Cap Type | Flip Top |
| Color | Brown |
| Material | Plastic |
| Mounting Brackets Included | Yes |
| Mounting Hardware Included | No |
| Mounting Hole Quantity | 3 |
| Package Contents | 1 Coolant Reservoir; 1 Cap; Fan Shroud |
| Pressurized | No |
This part fits 12 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2006 | Scion | xA | 1.5L | L4 | Front | Shroud Assembly; To 12/05 |
| 2006 | Scion | xB | 1.5L | L4 | Front | Shroud Assembly; To 12/05 |
| 2005 | Scion | xA | 1.5L | L4 | Front | Shroud Assembly |
| 2005 | Scion | xB | 1.5L | L4 | Front | Shroud Assembly |
| 2005 | Toyota | Echo | 1.5L | L4 | Front | Shroud Assembly |
| 2004 | Scion | xA | 1.5L | L4 | Front | Shroud Assembly |
| 2004 | Scion | xB | 1.5L | L4 | Front | Shroud Assembly |
| 2004 | Toyota | Echo | 1.5L | L4 | Front | Shroud Assembly |
| 2003 | Toyota | Echo | 1.5L | L4 | Front | Shroud Assembly |
| 2002 | Toyota | Echo | 1.5L | L4 | Front | Shroud Assembly |
| 2001 | Toyota | Echo | 1.5L | L4 | Front | Shroud Assembly |
| 2000 | Toyota | Echo | 1.5L | L4 | Front | Shroud Assembly |
* 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.