Product: Windshield Washer Reservoir Cap — Compatible with Tesla Model S / 3 / X / Y Key benefits Prevents leaks and spills: restores a secure seal on the washer fluid reservoir to stop fluid loss and enginebay contamination. Durable replacement: made from quality plastic that resists heat and normal wear so it lasts longer than a cracked or fatigued original cap. Simple maintenance solution: quick, tool swap that immediately returns the washer system to reliable operation. What it does Seals the windshield washer fluid reservoir to prevent leakage, evaporation and dirt entry. Replaces damaged, melted, or brittle caps caused by heat, age, or mechanical stress. Helps maintain washer fluid levels and reliable windshield cleaning performance. Compatibility Designed to fit Tesla Model S, Model 3, Model X and Model Y washer fluid reservoirs. Matches the original cap form and fit for an easy, correct replacement. Material and performance Constructed from durable, quality plastic for resistance to heat, chemicals in washer fluid, and everyday wear. Provides a snug seal when the cap and gasket are properly seated, reducing the chance of seepage or contamination. Installation Remove the old cap, inspect the gasket seating area for debris or damage, then place the cap and press until it seats securely. Check the gasket to ensure a proper seal after installation; no tools required in most cases. Practical use scenarios Winter driving: a cracked cap before cold weather to prevent washer fluid loss and maintain visibility when removing road salt and slush. After enginebay cleaning or service: Restore a proper seal if the original cap was removed or damaged during maintenance. Long trips or daily commuting: a fatigued cap to avoid slow leaks that can lower washer fluid between filling intervals and affect windshield visibility. Notes and care Inspect the gasket and reservoir neck for debris or damage before installation to ensure a reliable seal. Periodically check the cap for signs of wear or cracking and if the seal becomes compromised. This cap is a direct, dependable replacement to keep your Tesla's washer system sealed and working as intended.