The average cost to replace a fuel injector on most vehicles, which is one of the more common repair needs, would be about $140, excluding diagnosis.
How much does it cost to replace one fuel injector?
On average, you can expect to pay between $350 and $850 to replace your fuel injectors. The range of costs depends on a number of factors. Smaller vehicles with fewer cylinders requiring less expensive parts will come in at the lower end of the spectrum. Larger, high-performance engines will command a higher price tag.
How often does a fuel injector go bad?
The fuel injectors on your car will typically last between 50,000 and 100,000 miles. The length of time that the injector lasts has a lot to do with the type of gas that is used in the car and how often the various fuel filters are changed.
Why are fuel injectors so expensive?
Fuel injectors require high precision in their manufacturing
To be able to manufacture at such precise standards and to afford the exacting quality checks along with it also helps to explain part of the costs of quality fuel injectors.
Related Question how much does it cost to replace a fuel injector
Does a bad fuel injector make a knocking sound?
Engine knock results from the miss-timing of the combustion process between the injector firing and piston movement, resulting in a knocking sound from the engine. Control units could also be faulty or trying to make sense of false positive measurements from a faulty injector.