There are many different types of spark plugs, so be sure to get the right one. Spark plugs vary on how fast or slow it takes heat away from the You’ll need to know the year of your car, the make, model, and engine that your vehicle has in order to buy the correct one. If you decide to take your car to the shop instead of replacing it yourself, be prepared to have to drop your car off, as the spark plug can only be replaced when the car is cold.