Dorman 54375 Engine Coolant Reservoir Cap

Engine Coolant Reservoir Cap Replacement

Restore the cooling system seal with this Dorman engine coolant reservoir cap, part number 54375. It is a direct replacement for a cracked, missing, or worn coolant reservoir cap and is built for closed, pressurized systems that require a 20 psi pressure relief cap.

Compatible With Ram ProMaster 1500, Ram ProMaster 2500, Ram ProMaster 3500, Ram ProMaster City, Ram ProMaster Rapid, and Fiat 500L applications where this cap matches the original design.

Key Features

• Direct replacement coolant reservoir cap for closed cooling systems
• Pressure relief design rated at 20 psi
• Screw-on attachment for secure installation
• Round, vented, pressurized cap construction
• Plastic and rubber materials for cooling system service
• Quick pressure release feature
• Indicator markings for easier identification
• Black cap with yellow markings

Detailed Description

Dorman 54375 is engineered as a direct-fit engine coolant reservoir cap for vehicles that use a pressurized, closed cooling system. The cap measures 49.33 mm in diameter and 39.63 mm in overall height, with a 25 mm cap depth. Its screw-on design helps maintain a secure seal on the reservoir while the pressure relief function supports proper system operation.

This part cross-references Mopar 68097622AA and Motorad T75 for the same application. It is a practical replacement for Ram ProMaster 1500, Ram ProMaster 2500, Ram ProMaster 3500, Ram ProMaster City, Ram ProMaster Rapid, and Fiat 500L models that require this style of coolant reservoir cap. Use part number 54375 when matching the original cap specification matters.

What It Helps Fix

• Cracked coolant reservoir cap
• Lost or missing reservoir cap
• Coolant system pressure loss
• Improper reservoir sealing
• Warning signs related to cap wear or damage

Installation Notes and Tips

Verify the reservoir neck style, diameter, and pressure rating before installation. This cap uses a screw-on attachment and is intended for closed, pressurized cooling systems. Confirm the vehicle application against the original cap design on your Ram ProMaster or Fiat 500L before service. Part number 54375 should be matched to the OE-style cap specification for proper fit.

Quality Assurance

Dorman designs this coolant reservoir cap as a direct replacement part for the listed applications. The construction uses plastic and rubber materials selected for cooling system service, and the cap is built to meet the stated pressure rating and fitment requirements for the vehicles shown.