Cap Expansion Tank 1.2 Bar (BMW 3 Series E30) is a crucial component designed to regulate pressure within the coolant system of the BMW 3 Series E30. This cap maintains a controlled pressure of 1.2 bar, helping to prevent coolant loss and ensuring the cooling system operates efficiently under normal engine temperatures.
The expansion tank cap fits specifically to the coolant reservoir, playing an essential role in managing thermal expansion of the coolant fluid. When pressure builds inside the tank due to engine heat, this part allows the system to release or retain pressure as needed, protecting hoses and other cooling system components from damage or leaks.
When replacing this cap, confirm the pressure rating of 1.2 bar matches your existing part and ensure compatibility with the BMW 3 Series E30 coolant tank. Comparing the old cap’s specifications with this listing helps ensure proper function and system integrity.
- Pressure rating: 1.2 bar
- Vehicle group: BMW 3 Series E30
- Category: Fuel Tank component
This cap is for buyers needing a pressure-regulating closure for their BMW E30’s expansion tank. If uncertain about fitment or specifications, contacting the sales desk or submitting a request for a part may provide additional guidance.
Not sure the code, size or specification matches? Use more Fuel Tank or Request a Part with a clear photo of the old part before checkout.





