Nobody likes having to get their car repaired, but it is a necessity when you own a car. Here are five of the most common car repairs, according to CarMD, and what causes them to fail.

Note: these numbers are compiled from over 170,000 vehicle repairs from 1996 to 2010.

 1. Oxygen Sensor. In 2010, 9.43% of all auto repairs where for the oxygen sensor. This sensor usually lasts for about 50,000 miles and monitors the amount of unburned oxygen in the exhaust and helps tell the engine how much gas is in the tank.
2. Loose/Missing Fuel Caps. Believe it or not, 9.28% of all repairs in 2010 were actually for loose fuel caps. This can cause the "check engine" light to turn on and makes many people head to the service department.
3. Catalytic Converter. 6.4% of repairs involved the catalytic converter. This can be a costly repair, but one that is easily avoided by having simple routine maintenance performed, such as changing the spark plugs or a getting the fuel injector replaced, when needed.
4. Mass Air Flow Sensor. The next 4.36% of repairs were for this issue. The mass air flow sensor measures the amount of air supplied to the engine. This repair can also usually be avoided by having your air filters replaced regularly.
5. Spark Plugs. Spark plugs may be small, but they account for 3.71% of repairs in 2010. The spark plugs ignite the fuel inside the cylinders in your engine and can cause more serious issues (see catalytic converter above) if faulty ones are ignored for too long.

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