Dorman 603-378 Engine Coolant Reservoir - Front

Brand Dorman 603-378
Position Front
Material Plastic
Length 8.44
Color White
Mounting Hardware Included No
Height 4.03
Shape Irregular
Mounting Hole Quantity 3
Mounting Brackets Included Yes
Cap Type Spring loaded twist
Pressurized Yes
Cap Maximum Pressure Rating 21
Level Sensor Included No
Cap Included Yes
Capacity 1.1 l
Package Contents 1 coolant reservoir; 1 cap
Fits Dodge · 12 vehicles

OE direct replacement. Engineered to match the fit and function of the original part.

Durable plastic construction. Built to withstand underhood heat and engine vibration.

Pressurized reservoir. Includes a spring-loaded twist cap rated to 21 psi.

Cross-references 55111471AB for the same application. See all 1.

$60.78Free shipping
In stock · usually ships same day before 1pm CST
Step 1 — Confirm fitment
Free return shipping if it doesn't fit when you check fitment here first.

Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
Step 2 — Quantity
Order total $60.78
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.

Engine Coolant Reservoir for Dodge Dart

This Dorman engine coolant reservoir is a direct replacement for the original tank used on select 2013-2016 Dodge Dart models. Built from plastic and shaped to match the OE layout, it is made to restore proper coolant expansion and recovery in the front-mounted cooling system.

  • Direct replacement coolant reservoir for select Dodge Dart applications
  • Plastic construction for underhood heat and vibration resistance
  • Pressurized design with spring-loaded twist cap
  • Cap included with a 21 psi maximum pressure rating
  • Mounting brackets included for OE-style placement
  • White irregular-shaped reservoir with 1.1 L capacity
  • Part number 603-378 for application matching and search accuracy

Fitment and Application Details

Compatible with 2013-2016 Dodge Dart, front. This reservoir is engineered to match the fit and function of the original part, making it a practical choice when replacing a cracked, leaking, or heat-damaged coolant tank on a Dodge Dart. Part number 603-378 is also referenced for OE-style application matching.

This part cross-references Mopar 55111471AB for the same application.

What This Reservoir Helps Address

  • Coolant loss from a split or cracked reservoir
  • Overflow or recovery issues caused by a damaged tank
  • Pressure retention problems related to a worn cap or reservoir neck
  • Heat-related plastic fatigue in the original coolant bottle
  • Fitment issues after replacing a failed OE reservoir on a Dodge Dart

Installation Notes and Tips

Verify the reservoir shape, mounting hole count, and cap style before installation. Transfer any reusable hoses or sensors from the original setup if applicable, since no level sensor is included. Confirm the mounting points align with the front position on the vehicle and inspect the cooling system for leaks before refilling and bleeding the system.

Quality Assurance

Dorman manufactures this replacement coolant reservoir from quality materials and engineers it to match original fit and function. The design is intended to withstand underhood heat and engine vibration for dependable cooling system service.

This part fits 12 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2016DodgeDart2.4LL4Front
2016DodgeDart1.4LL4Front
2016DodgeDart2.0LL4Front
2015DodgeDart2.4LL4Front
2015DodgeDart1.4LL4Front
2015DodgeDart2.0LL4Front
2014DodgeDart2.4LL4Front
2014DodgeDart1.4LL4Front
2014DodgeDart2.0LL4Front
2013DodgeDart2.0LL4Front
2013DodgeDart2.4LL4Front
2013DodgeDart1.4LL4Front
Directly replaces or cross-references 1 part number
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
55111471AB