2 Pack Engine Radiator Coolant Reservoir Tank With Yellow Cap Replacement OEM 21712 79900 Check Vehicle Fitment Plug And Play Durable Replacement Part For Your Car

2-Pack Engine Coolant Reservoir Cap, OEM 21712-79900
✔️ Two caps, yellow, fits select vehicles; 1.5x1.5 in outer, 0.43 in tall

These 2-pack radiator coolant reservoir caps are replacement caps for the expansion tank that helps maintain cooling system pressure. They're handy for DIY car maintenance in garages or at home.

✅ Outer diameter approximately 1.5 x 1.5 inches; inner diameter 1.2 x 1.2 inches; height 0.43 inches
✅ Made from durable premium plastic that withstands high temperatures
✅ Well-sealed design prevents coolant leaks during motion
✅ Includes 2 caps; lightweight replacement option for compatible models

💡 What is a coolant reservoir cap used for and why replace it?

A handy explanation for car owners explains why a replacement matters. - Maintains pressure in the cooling system - Seals against leaks and prevents coolant spills - Helps prevent overheating by keeping the system sealed - Ready-to-install option for OEM 21712-79900 compatible models