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Engine Coolant Reservoir Cap
Fits A8, S4Engine Coolant Expansion Tank - Repair or ReplaceA failed expansion tank can cause the cooling system in your 2008 Audi RS4 to leak antifreeze, or it can cause your engine to overheat. If you're losing coolant, contact our service department to avoid engine damage.
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6972 US Hwy. 72 W., Huntsville, AL, 35806-1726