Guaranteed fitment precision-molded to OE cap dimensions to ensure compatibility with original and aftermarket coolant recovery tanks. Quality cap and seal materials resist engine heat and harsh cooling system environment factory pressure-tested.
Part #’s
17-11-7-639-020 / 17 11 7 639 020 / 17117639020
17-11-7-521-071 / 17 11 7 521 071 / 17117521071
Caps, Caps ### Engine, Cooling, Covers, Engine
Expansion Tank Cap – BMW 1/3/5 Series / X3 / X5 / Z4 (many models check fitment)
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