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It depends on where the leak is. If it's just a hose that is pretty easy to fix. If it is the manifold gasket that is a bit harder and can be expensive. Either way you need to get it taken care of soon because your car will not perform at it's best with a vacuum leak and gas mileage will probably be poor as well.

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14y ago

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Q: How bad is it if your car has a vacuum leak?
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