TOYOTA 85316-0K010 Windshield Washer Reservoir Cap

The genuine TOYOTA (part number: 85316-0K010) windshield washer reservoir cap is a premium-quality, original replacement part designed to securely seal the washer fluid reservoir. This small yet critical component prevents dirt, dust, engine bay soot, and other foreign contaminants from entering the washer system, thereby protecting the washer pump and spray nozzles from clogs and premature failure.

Key Features and Technical Specifications:

• Manufacturer: TOYOTA (Original Equipment Manufacturer - OEM)
• Part Number: 85316-0K010
• Part Type: Washer Fluid Reservoir Cap (Cap, Washer, Tank)
• Material: High-strength, chemical- and heat-resistant plastic (polypropylene), offering excellent resistance to high engine bay temperatures and the chemical effects of windshield washer concentrates.
• Design: Features an ergonomic tab for easy opening and closing, marked with a standard windshield washer icon for quick identification.

Function and Importance:

The washer reservoir cap acts as a primary line of defense. Without an adequate seal, dust particles and microscopic debris entering the tank exert an abrasive effect on the internal components of the electric pump and can obstruct the fine spray nozzles. Furthermore, it prevents premature fluid evaporation and stops washer fluid from splashing into the engine compartment while the vehicle is in motion.

Signs of Wear or Failure:

• Material Fatigue and Cracking: Engine bay temperature fluctuations can cause the plastic to become brittle, discolored, and cracked over time.
• Loose Fit: If the cap no longer seals tightly, washer fluid may leak or evaporate.
• Physical Damage or Loss: If the retaining tab breaks or the cap is lost entirely, immediate replacement is required to preserve the cleanliness of the system.