Coolant Reservoir Cap For BMW Radiator Expansion Tank Replacement Plug And Play No Fuss Easy Install Fits 2007 2018 1 Series 2 Series 3 Series 4 Series Includes 128i 135i 228i 320i 328i 330i 335i 428i 435i

Premium BMW coolant reservoir cap replacement
✔️ Direct replacement cap fits BMW 1-6 Series, single-cap install

This coolant reservoir cap is a direct replacement for cracked or missing caps on BMW expansion tanks, helping seal the system and prevent leaks.

✅ Direct OEM-style replacement cap for BMW coolant reservoir
✅ Fits BMW 1-6 Series and M/X models
✅ Includes washer seal for leak-free operation
✅ Package includes 1 cap cover

💡 What is a coolant reservoir cap used for in BMW cooling systems?

- Keeps expansion tank sealed to maintain pressure and prevent leaks - Prevents coolant loss and air ingress into the cooling circuit - Quick, handy replacement for many BMW models