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Need to check to make sure your coolant level is ok. Do you have a gauge? Is it running hot?

Ans: The level sensor in these cars is sensitive. Typically adding a few ounces of coolant to the reservoir until the level is just above the upper hose will solve the issue. If you still have a coolant light, the sensor has failed. It is easy to replace.

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Q: What causes the cooling system light to come on in a 1998 Mercury Mystique?
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bleeder valve on cooling system

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On a 1998 Mercury Mystique : To the left of your tachometer is the seatbelt reminder light and Under your fuel gauge is the airbag readiness light ( if the light stays on or flashes take your vehicle in to have the airbag ( Supplemental Restraint System , SRS ) system checked out / repaired

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A little more information please . What year , four cylinder or V6 , automatic or manual transmission . Then someone can probably answer your question about the coolant system capacity of a Mercury Mystique . Thanks ( also might need to know if it has air conditioning )

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This should not be necessary on this vehicle.

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