Replace when performing cooling service.
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Connects the expansion tank to the radiator
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Upgrade to AutoTecknic’s Pre-Preg Carbon Fiber Coolant Expansion Tank Cap Cover and give your BMW the exclusive, high-performance look it deserves.
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Does not include cap or coolant level sensor
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This sensor is used in multiple locations, depending on model: coolant level, washer level, and power steering level
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Located on the expansion tank
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Brand:
ES#:
4905031
Mfg#:
61311384739
In Stock
ON SALE!
SAVE 23%
$18.99
This product was last offered at the strikethrough price on 05-02-2026
Found on the end of the coolant level sensor. Made in Germany.
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Does not include cap or coolant level sensor
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A common source of overheating problems is a broken or leaking coolant expansion tank. Replace it with an OEM coolant expansion tank or quality aftermarket expansion tank to prevent future woes.
Lifetime Replacement
