Clean up your engine bay or replaced your cracked unit with a new coolant expansion tank
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Triangular Connector
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Triangular Connector
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Stop coolant loss and cure a fogged windshield
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Updated <font color='green'>Green</font> sensor with square/round connector. Please check existing sensor color
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Revised green 4 pin sensor, located in the cooling flange located on the side of the cylinder head
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Seals the expansion tank cap to the reservoir. 28.5x3.8
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Connects the upper radiator hose to the top of the secondary water pump
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Includes sealing O-Ring
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Si-OAT technology specifically engineered for modern BMW, VW, Audi, and Porsche vehicles.
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Brand:
ES#:
5435259
Mfg#:
904683
Back Ordered
$25.99
This product was last offered at the strikethrough price on 05-07-2026
Optimize your engine cooling system performance and heater output with quality drive belts, coolant hoses, cooling system parts, and approved coolant fluids from ECS Tuning. Head off expensive repairs and untimely breakdowns with regularly scheduled cooling system inspection and maintenance.
Lifetime Replacement
