CSF Standard Replacement Radiator Cap — direct fit for Mercury Mountaineer all (1998-2001). Genuine quality replacement built to OEM tolerances, ships to all 50 USA states from RevXSC.
Engineered by CSF as a standard replacement grade radiator cap for the all engine, this 4503 matches factory mounting points and form factor so install requires no modification. Mini, 16 PSI Standard replacement spec — the same dimensions, materials and performance envelope as the original factory part.
| Year | Make / Model | Engine | Notes |
|---|---|---|---|
| 1998 | Mercury Mountaineer | all | Mini, 16 PSI |
| 1999 | Mercury Mountaineer | all | Mini, 16 PSI |
| 2000 | Mercury Mountaineer | all | Mini, 16 PSI |
| 2001 | Mercury Mountaineer | all | Mini, 16 PSI |
Always replace radiator cap components in matched sets where applicable, torque fasteners to factory spec, and inspect adjacent cooling system components for wear during installation. If you're not sure which variant matches your VIN, send us the last 8 digits of the VIN before checkout and we will confirm fitment.
Is 4503 a direct replacement?
Yes — CSF 4503 is built to OEM form/fit/function for the Mercury Mountaineer all (1998-2001).
Do you ship to my state?
We ship to all 50 USA states. Tracking is provided.
What's the difference between Economy, Standard Replacement and Heavy Duty?
Economy is the value-priced option for everyday driving; Standard Replacement matches OEM spec; Heavy Duty uses upgraded materials for towing, fleet and severe service.
How can I confirm fitment?
Match year, make, model and engine (1998-2001 Mercury Mountaineer all). When in doubt, send your VIN — we verify before dispatch.
Keywords: CSF 4503, 4503 radiator cap, mercury mountaineer radiator cap, mercury mountaineer all radiator cap, mercury mountaineer radiator cap 1998-2001, standard replacement radiator cap mercury mountaineer, oem replacement radiator cap mercury mountaineer, aftermarket mercury mountaineer radiator cap, buy 4503 online usa, mercury mountaineer radiator cap usa, mercury mountaineer all parts, csf radiator cap 1998-2001
Note: The product image is for illustrative purposes only. Actual product may vary slightly in appearance, packaging, or labeling. Fitment and specifications are guaranteed to OEM standards.