Fuel injectors are a key part of modern automotive systems, as they’re responsible for getting fuel into the engine in a precise, orderly and carefully engineered pattern. In general, they’re expected to last a pretty long time. Both Bosch and Delphi, two major manufacturers of automotive components, say their fuel injectors have a life expectancy of 1 billion cycles. Essentially, that means that the fuel injectors should last a fair while but that caveat on that is REGULAR SERVICING. If you begin to notice that your vehicle is not operating as efficiently as usual it may be an issue with the fuel injection system. To help diagnose the issue, check out some of these common symptoms and causes of fuel injection system failure.