Genuine BMW Expansion Tank Cap - G2x G4x G6x G7x
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Product Details
A failing expansion tank cap can compromise your entire cooling system, leading to lost pressure, fluid boil-off, and dangerous temperature spikes under load. This Genuine BMW Coolant Reservoir Cap restores factory pressure thresholds to keep your coolant boiling point elevated during spirited driving and track sessions. Built to precise OEM tolerances for modern G-chassis BMW models, it provides total seal integrity to keep your cooling system operating at peak thermal efficiency.
- Restores factory cooling system pressure to prevent heat-induced coolant boil-over
- Precision OEM sealing ring prevents fluid migration and system pressure loss
- Direct factory replacement engineered to withstand intense thermal cycling and track heat
Prop 65 Warning
- 17138665638, 17-13-8-665-638, 17 13 8 665 638, 17.13.8.665.638
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