Dorman 54223 Engine Coolant Reservoir Cap

Engine Coolant Reservoir Cap Replacement

Replace a cracked or missing coolant reservoir cap with a direct-fit Dorman solution built for the specified reservoir application. Dorman 54223 is a threaded, twist-style plastic cap made for a secure closure on the coolant reservoir used in select Honda Civic and Acura EL models.

• Direct replacement engine coolant reservoir cap
• Threaded twist-on design for a secure reservoir seal
• Plastic construction with 37 mm diameter
• White finish
• Non-pressurized, non-vented design
• Compatible with Dorman Reservoir 603-803

Product Details

Dorman 54223 is engineered as a direct replacement for the original engine coolant reservoir cap on the listed applications. It is designed for 1996-2000 Honda Civic and 1997-2000 Acura EL vehicles when used with Dorman Reservoir 603-803. This coolant reservoir cap uses a threaded twist attachment and is sized at 37 mm to match the specified reservoir opening. If you are searching for a Honda Civic coolant reservoir cap replacement or an Acura EL reservoir cap by part number 54223, this part provides the correct fitment for the listed vehicles and reservoir.

This part cross-references OE part number 19102P2A000 for the same application.

What It Helps Fix

• Cracked coolant reservoir cap
• Lost or missing reservoir cap
• Improper closure at the coolant reservoir opening
• Reservoir cap mismatch on the specified Dorman reservoir
• Service issues caused by a damaged plastic cap

Installation Notes and Tips

Verify reservoir compatibility before installation. This cap is only compatible with Dorman Reservoir 603-803 and is not a universal coolant cap. Confirm the 37 mm threaded opening, then install by hand using the twist-on design until fully seated. Check the cap and reservoir neck for damage before replacement to ensure proper closure.

Quality Assurance

Dorman designs direct replacement parts to match the original application requirements. Part number 54223 is built for the listed Honda Civic and Acura EL fitments and follows the specified reservoir configuration for a straightforward replacement.