Two Pack Black Engine Radiator Coolant Reservoir Cap For Infiniti Nissan Renault OEM 21712 79900 Compatible 1.5 Inch Diameter Water Tank Cap Easy Install Tight Seal High Temp Rated Durable Replacement
✔️ 2-pack black cap, 1.5 in dia (38.1 mm), high-temp, OEM 21712-79900
This two-pack black engine radiator coolant reservoir cap is a ready-to-swap replacement for the coolant tank on many Infiniti, Nissan, and Renault models. It provides a secure seal to prevent leaks and maintain proper system pressure under engine heat and driving conditions. The cap’s outer diameter is 1.5 inches (38.1 mm), inner diameter 1.2 inches (30.5 mm), height 0.43 inches (10.9 mm); OEM model number 21712-79900. Made from durable plastic and rated for high temperatures, it’s built to last and withstand everyday use. Pack includes two caps for convenient replacement and spare capacity.
✅ Outer diameter 1.5 in (38.1 mm), inner 1.2 in (30.5 mm)
✅ Height 0.43 in (10.9 mm); seals to prevent leaks
✅ Model number 21712-79900; OEM-style fit
✅ Color: black; two caps per pack
✅ Material: durable plastic, high-temp resistance
✅ Easy install for quick replacement
💡 What is a radiator coolant reservoir cap and why replace it?
A radiator cap helps maintain pressure and prevent leaks in the cooling system. Upgrading to a quality cap keeps the system stable under heat. - It maintains system pressure to prevent boil-overs- It blocks dirt and debris from entering the reservoir
- It’s quick to swap on many vehicles, including Infiniti, Nissan, Renault
- It improves reliability and reduces risk of coolant loss