HomeBelts and Cooling > Radiators, Coolers and Related ComponentsDorman 603-542 Engine Coolant Reservoir - Front
Part #: 603-542

Dorman 603-542 Engine Coolant Reservoir - Front

Front
⚙️ 19 vehicles fit this part
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Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Mazda, 626 and MX-6
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Overview of Dorman Engine Coolant Reservoir for Mazda 626 and MX-6

The Dorman 603-542 engine coolant reservoir is designed specifically for Mazda 626 and MX-6 models. This white plastic coolant reservoir includes a flip top cap and mounting brackets, providing a reliable replacement part for your vehicle's cooling system.

  • Durable white plastic construction
  • Includes flip top cap for easy access
  • Mounting brackets included for secure installation
  • Single mounting hole design
  • Non-pressurized reservoir
  • Compatible with Mazda 626 and MX-6 models
  • Part number 603-542 for precise fitment

Detailed Product Description

The Dorman 603-542 engine coolant reservoir is crafted from sturdy plastic material, ensuring resistance to heat and corrosion within the engine bay. Its white color allows for easy fluid level inspection without removing the cap. The reservoir comes with a flip top cap included, which simplifies coolant refilling and maintenance. Designed with one mounting hole and supplied with mounting brackets, this reservoir can be securely attached to the vehicle frame, maintaining stability during operation. This reservoir is non-pressurized, matching the original equipment specifications for Mazda 626 and MX-6 models, ensuring proper coolant expansion and recovery.

Common Applications and Issues Addressed

  • Replacement for cracked or leaking coolant reservoirs
  • Solves coolant overflow due to damaged caps
  • Prevents engine overheating caused by coolant loss
  • Restores proper coolant level monitoring
  • Addresses mounting bracket failure or damage

Installation Notes and Tips

  • Ensure the engine is cool before removing the old reservoir
  • Check for any damaged hoses or fittings during installation
  • Use the included mounting brackets for secure fitment
  • Verify the flip top cap seals properly to prevent leaks
  • Refill with the recommended coolant type for Mazda 626 or MX-6

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards, providing reliable performance and durability. The 603-542 engine coolant reservoir undergoes quality inspections to ensure proper fit and function. While specific warranty details may vary, Dorman typically offers limited warranties covering defects in material and workmanship.

BrandDorman
Part Number603-542
Cap IncludedYes
Cap TypeFlip Top
ColorWhite
MaterialPlastic
Mounting Brackets IncludedYes
Mounting Hardware IncludedNo
Mounting Hole Quantity1
Package Contents1 Coolant Reservoir; 1 Cap
PressurizedNo

This part fits 19 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
1992Mazda6262.2LL4Front
1992MazdaMX-62.2LL4Front
1992MazdaMX-62.2LL4Frontw/2 Wheel Steering
1991Mazda6262.2LL4Front
1991Mazda6262.2LL4Frontw/2 Wheel Steering
1991MazdaMX-62.2LL4Front
1991MazdaMX-62.2LL4Frontw/2 Wheel Steering
1990Mazda6262.2LL4Front
1990Mazda6262.2LL4Frontw/2 Wheel Steering
1990MazdaMX-62.2LL4Front
1990MazdaMX-62.2LL4Frontw/2 Wheel Steering
1989Mazda6262.2LL4Front
1989Mazda6262.2LL4Frontw/2 Wheel Steering
1989MazdaMX-62.2LL4Front
1989MazdaMX-62.2LL4Frontw/2 Wheel Steering
1988Mazda6262.2LL4Front
1988Mazda6262.2LL4Frontw/2 Wheel Steering
1988MazdaMX-62.2LL4Front
1988MazdaMX-62.2LL4Frontw/2 Wheel Steering

* 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:

F20115350BFRT2105C

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