When you own a car, you should take special attention to notice very minute changes including smells, from your favorite vehicle. A musty odor from the car indicates that water is trapped under the carpet or so. An electric smoky smell means you should shut down the car. If there is an overflow of fuel inside the car, it will be shown as fuel smells. Exhaust smells mean that there is excess engine oil. You will get a sweatish smell from the car if the dynamo is to be replaced. If you feel a burning rubber smell, understand that tyres are over heated or you are driving with your breaks on.