Injectors atomize fuel into the intake port or directly into the cylinder for precise air/fuel mixture control.
The ECM pulses each injector's solenoid (or piezo element on direct-injection) to open and meter fuel for milliseconds at a time.
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Replacement runs $350–$2200 including parts and 1-6 hours labor. Exact cost depends on vehicle, parts tier (OEM vs aftermarket), and local labor rate.
Expected lifespan is 100,000-150,000 miles (less on dirty fuel). Driving conditions, climate, and maintenance affect real-world life.
Rough idle; Misfire codes; Black exhaust smoke; Loss of power; Fuel smell; Hard starts.
Most modern fuel injectorss are sealed units that get replaced rather than rebuilt. A shop will diagnose, confirm with a load or output test, then swap the unit and verify operation.
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