How Many Kilometers Should the Fuel Injector Be Replaced?

2 Answers
DelAlex
09/05/25 5:09am
Generally, it does not need to be replaced. Below is relevant information about fuel injectors: 1. Definition: A fuel injector is a normally closed valve (a normally closed valve means that when there is no input control signal, the valve remains closed; whereas a normally open valve remains open without an input control signal). The opening and closing of the valve are controlled by the up-and-down movement of a valve needle. When the ECU issues a fuel injection command, its 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 be sprayed out through the injection hole. 2. Impact of Carbon Deposits: As one of the key components of an electronic fuel injection engine, the performance of the fuel injector significantly affects the engine's overall performance. A clogged fuel injector can severely impair the vehicle's performance. The clogging is usually caused by carbon deposits accumulating on the injector or impurities in the fuel blocking the injector's pathways. After driving for a certain period, the fuel system will inevitably develop some deposits.
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ORachel
09/17/25 5:36am
Hey, when it comes to fuel injector replacement, it's definitely not based on a fixed mileage. I love tinkering with cars and have replaced parts on several vehicles, but I've never rigidly changed fuel injectors based on mileage. My advice is to have them inspected during maintenance every 80,000 to 100,000 kilometers—no need to replace them if they're not faulty. My current car has clocked 150,000 kilometers, and the fuel injectors are still working perfectly. I just clean them every two years and use additives to prevent clogging. If there's a real issue, you'll notice—severe engine shaking or a sudden spike in fuel consumption. Address it promptly to avoid engine damage or wasting money on extra fuel. Fuel injectors have a long lifespan; 150,000 kilometers is no problem. Just maintain them regularly to avoid unnecessary expenses.
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