On One Hand: A Leaky Fuel Injector Is DangerousFuel injectors control the amount of air and fuel that is sent into the engine. If your fuel injector is leaking, it is likely leaking gasoline. This can pose a fire hazard should it begin to drip into heat-sensitive areas. Contact with a hot exhaust pipe can ignite a blaze.On the Other: Fuel Injectors Are Easy To ReplaceReplacing a fuel injector is an easy maintenance procedure. Even if you’ve never done it before, changing a fuel injector can be done in as little as 30 minutes. The biggest issue is the cost of the procedure. New fuel injectors range from $75 to $100.Bottom LineIf you have a leak in your fuel injector, get it checked out as soon as possible. The risk of driving with a fuel leak is too great.