If one fuel injector is broken, do all four need to be replaced?

[LeAnderson]

Only the damaged fuel injector needs to be replaced. Below is relevant information about fuel injectors: 1. Definition: A fuel injector is essentially a normally closed valve (meaning the valve remains closed when no control signal is input; whereas a normally open valve remains open without a control signal), with its opening and closing controlled by the up-and-down movement of a valve needle. When the ECU issues a fuel injection command, the voltage signal causes current to flow through the coil inside the fuel injector, generating a magnetic field that lifts the valve needle, opening the valve to allow fuel to spray out through the injection hole. 2. Carbon deposit impact: As one of the key components of an electronically controlled fuel injection engine, the performance of the fuel injector significantly affects the engine's overall performance. A clogged fuel injector can severely impair vehicle performance. Clogging occurs due to carbon deposits from the engine accumulating on the injector or impurities in the fuel blocking the injector's pathways. After a period of driving, certain deposits will form in the fuel system.