HomeBelts and Cooling > Radiators, Coolers and Related ComponentsDorman 603-205 Engine Coolant Reservoir - Front
Part #: 603-205

Dorman 603-205 Engine Coolant Reservoir - Front

Front
⚙️ 16 vehicles fit this part
🔍
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$50.37Free Shipping
🚚Free ShippingNo Cost to Continental U.S.
🔄Free Returns*Wrong fit? No cost
🛡️60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
🔥
✅ In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Ford, Mazda, and Mercury, Escape, Tribute, and Mariner
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Dorman Engine Coolant Reservoir 603-205

The Dorman 603-205 engine coolant reservoir is designed for reliable cooling system performance in Ford Escape, Mazda Tribute, and Mercury Mariner vehicles. This clear plastic reservoir includes a spring loaded twist cap and mounting brackets for secure installation.

  • Constructed from durable clear plastic material
  • Dimensions: 204.3 mm length and 270.6 mm height
  • Includes spring loaded twist cap rated for 17 psi maximum pressure
  • Pressurized reservoir design for efficient coolant management
  • Equipped with two mounting holes and included mounting brackets
  • Cap and reservoir included in the package

Detailed Product Description

The Dorman 603-205 engine coolant reservoir is engineered to meet the cooling system requirements of select Ford, Mazda, and Mercury models, specifically the Escape, Tribute, and Mariner. Made from clear plastic, the reservoir allows for easy visual inspection of coolant levels. Its pressurized design supports optimal coolant flow and system pressure, with a spring loaded twist cap rated to withstand up to 17 psi. The reservoir measures 204.3 mm in length and 270.6 mm in height, fitting precisely within the engine bay. Two mounting holes and included brackets ensure a secure and stable installation without the need for additional hardware.

Common Applications and Problem Resolution

  • Replacement for cracked or leaking coolant reservoirs
  • Restores proper coolant level monitoring and containment
  • Prevents coolant loss due to faulty or damaged reservoirs
  • Maintains system pressure to avoid overheating issues
  • Addresses coolant reservoir cap failures affecting pressure regulation

Installation Notes and Tips

  • Verify compatibility with Ford Escape, Mazda Tribute, or Mercury Mariner before installation
  • Ensure the engine is cool before removing the old reservoir to avoid injury
  • Use the included mounting brackets and two mounting holes for secure fitment
  • Check the spring loaded twist cap for proper sealing after installation
  • Inspect coolant levels and system pressure after replacement

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM specifications for fit, form, and function. The 603-205 engine coolant reservoir undergoes quality control testing to ensure durability and performance under normal operating conditions. This part includes the reservoir and cap, both designed for long-term reliability. Warranty coverage details can be obtained from the product documentation or manufacturer.

BrandDorman
Part Number603-205
Cap IncludedYes
Cap Maximum Pressure Rating17
Cap TypeSpring Loaded Twist
ColorClear
Height270.6
Length204.3
MaterialPlastic
Mounting Brackets IncludedYes
Mounting Hardware IncludedNo
Mounting Hole Quantity2
Package Contents1 Coolant Reservoir; 1 Cap
PressurizedYes

This part fits 16 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2006FordEscape3.0LV6Front
2006MazdaTribute2.3LL4Front
2006MazdaTribute3.0LV6Front
2006MercuryMariner3.0LV6Front
2005FordEscape3.0LV6Front
2005MazdaTribute2.3LL4Front
2005MazdaTribute3.0LV6Front
2005MercuryMariner3.0LV6Front
2004FordEscape3.0LV6Front
2004MazdaTribute3.0LV6Front
2003FordEscape3.0LV6Front
2003MazdaTribute3.0LV6Front
2002FordEscape3.0LV6Front
2002MazdaTribute3.0LV6Front
2001FordEscape3.0LV6Front
2001MazdaTribute3.0LV6Front

* 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:

1L8Z8A080BB58808A60320588080BAJ0315350HDAKG-1L8Z8AFRT1505CSK603205

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.