HomeBelts and Cooling > Radiators, Coolers and Related ComponentsDorman 603-203 Engine Coolant Reservoir - Front
Part #: 603-203

Dorman 603-203 Engine Coolant Reservoir - Front

Front
⚙️ 14 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Ford and Mercury, Taurus and Sable
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Overview of Dorman Engine Coolant Reservoir 603-203

The Dorman 603-203 engine coolant reservoir is designed for reliable cooling system performance in Ford Taurus and Mercury Sable vehicles. This clear plastic reservoir includes a spring loaded twist cap and mounting brackets for secure installation.

  • Material: Durable clear plastic for easy fluid level monitoring
  • Cap Type: Spring loaded twist cap included with a 16 psi pressure rating
  • Mounting: Comes with mounting brackets and two mounting holes for proper fitment
  • Pressurized reservoir designed to maintain system pressure
  • Package includes one coolant reservoir and one cap

Detailed Product Description

The Dorman 603-203 engine coolant reservoir is engineered to meet the cooling system requirements of Ford Taurus and Mercury Sable models. Constructed from clear plastic, it allows for quick visual inspection of coolant levels without removal. The included spring loaded twist cap is rated for a maximum pressure of 16 psi, ensuring the cooling system maintains proper pressure to prevent overheating and coolant loss. This reservoir is pressurized and comes with mounting brackets and two mounting holes, facilitating a secure and stable installation in the engine bay.

Compatible Vehicles and Applications

This engine coolant reservoir is compatible with the following vehicles:

  • Ford Taurus
  • Mercury Sable

It is specifically designed to replace the original reservoir in these models, ensuring proper fit and function.

Common Issues Addressed by This Coolant Reservoir

  • Coolant leaks due to cracked or damaged reservoirs
  • Inaccurate coolant level readings from discolored or opaque tanks
  • Loss of system pressure causing engine overheating
  • Failure of the reservoir cap leading to coolant evaporation
  • Improper mounting causing vibrations or damage to the reservoir

Installation Notes and Tips

  • Ensure the engine is cool before removing the old reservoir to avoid burns
  • Check that the mounting brackets and holes align properly with the vehicle’s frame
  • Use the included spring loaded twist cap to maintain correct system pressure
  • Inspect hoses connected to the reservoir for wear or damage during installation
  • Fill the reservoir with the recommended coolant type and check for leaks after installation

Quality Assurance and Warranty

Dorman manufactures the 603-203 engine coolant reservoir to meet or exceed OEM specifications for Ford Taurus and Mercury Sable vehicles. The product includes a cap rated for 16 psi to maintain system integrity. While specific warranty details are not provided, Dorman products typically come with a limited warranty against defects in materials and workmanship.

BrandDorman
Part Number603-203
Cap IncludedYes
Cap Maximum Pressure Rating16
Cap TypeSpring Loaded Twist
ColorClear
MaterialPlastic
Mounting Brackets IncludedYes
Mounting Hardware IncludedNo
Mounting Hole Quantity2
Package Contents1 Coolant Reservoir; 1 Cap
PressurizedYes

This part fits 14 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2007FordTaurus3.0LV6Front
2006FordTaurus3.0LV6Front
2005FordTaurus3.0LV6Front
2005MercurySable3.0LV6Front
2004FordTaurus3.0LV6Front
2004MercurySable3.0LV6Front
2003FordTaurus3.0LV6Front
2003MercurySable3.0LV6Front
2002FordTaurus3.0LV6Front
2002MercurySable3.0LV6Front
2001FordTaurus3.0LV6Front
2001MercurySable3.0LV6Front
2000FordTaurus3.0LV6Front
2000MercurySable3.0LV6Front

* 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:

11808A1F1Z8A080AA603203DAKG-8100ZFRT1501CSK603203

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