Many drivers may take for granted the fact that their car is equipped with a spare tire. But according a news release from AAA, that may not be true. In order to meet new government fuel efficiency standards, some car makers are taking out spare tires and instead equipping cars with emergency sealant or an inflator kit. They may also make the car with tires that can still operate even with damage.

In 2010 the Department of Transportation and the Environmental Protection Agency increased the limit for miles per gallon rates. For 2012 models, vehicles must have a combined 29.7 mpg. That will increase to 34.1 mpg in 2016. Those increases are forcing auto makers to change things that were once commonplace– like the inclusion of a spare tire. Spare tires and tools can weigh as much as 40 pounds. “Unfortunately many vehicle owners may be unaware that their vehicle has no spare tire until they experience a flat tire,” says John Nielsen, AAA National Director of Auto Buying, and Consumer Information. “Consumers should review their owner’s manual and emergency maintenance supplies they have in the vehicle and be informed about alternatives to a spare to prevent panic or a delay when encountering a flat tire.”

To ensure that you are protected against a flat find out if you have a spare tire. AAA says it’s important to come up with an alternative solution if one is not present. Keep in mind that if sealant is your option, it needs to be replaced every five years or after it’s used.