Dorman 54210 Engine Coolant Reservoir Cap

Dorman 54210 Coolant Reservoir Cap

Replace a cracked, missing, or worn coolant reservoir cap with this direct replacement from Dorman. Built as a black plastic, snap-on, flip-top cap with a 82 mm diameter, it is vented and non-pressurized for the specified application.

Key Features

• Direct replacement engine coolant reservoir cap
• Black plastic construction
• 82 mm diameter with snap-on attachment
• Flip-top design with vented construction
• Non-pressurized cap for the listed application
• Package contains 1 coolant cap

Product Details

Dorman 54210 is engineered to replace the original coolant reservoir cap on select vehicles with a precise fit and function. This cap is listed for 2005-2007 Ford Focus automatic transmission vehicles and is noted for the washer fluid reservoir cap position in the fitment data. If you are searching for a 2005 Ford Focus coolant reservoir cap, 2006 Ford Focus reservoir cap, or 2007 Ford Focus replacement cap, this part number provides a direct-reference option. This part cross-references Ford (e.g., 9S4Z8100B) for the same application.

Common Issues It Can Help Address

• Cracked reservoir cap housing
• Lost or missing cap
• Loose cap fit at the reservoir opening
• Damaged vented cap that no longer seals properly
• Replacement after original cap wear or breakage

Installation Notes

Confirm the reservoir opening diameter and attachment style before installation. This cap uses a snap-on, flip-top design and does not use a pressure release lever. Verify vehicle configuration against the fitment notes for 2005-2007 Ford Focus automatic transmission vehicles before ordering. Part number 54210 should be matched to the original cap shape and size for proper fit.

Quality Assurance

Dorman manufactures direct replacement components to match the original part’s basic form and function. Part number 54210 is built from plastic and specified as vented and non-pressurized for the listed application.