Fuel Injector Replacement

How Much Does a Fuel Injector Replacement Cost?

Read Time:6 Minute, 41 Second

On average, you can expect to pay between $350 and $850 to replace your fuel injectors. Various variables affect the cost range. On the lower end of the spectrum, smaller cars with fewer cylinders and less expensive parts will be found. Costs will increase for larger, more powerful engines.

Fuel injection systems have been improved to such an extent that they can usually be used for a long time without much trouble. However, this does not mean that they will exist forever. Although fuel injectors can be used for the entire life cycle of a vehicle, sometimes this is not the case.

If you or the previous owner fails to maintain in time, there is a fault or the fuel system is blocked, or the ABS sensor is faulty, you may need to replace the fuel injector.

Fortunately, replacing fuel injectors is usually not a huge cost unless they are part of a larger engine problem. Proper maintenance of your fuel injectors will help prevent more serious problems. How much does it cost to replace the fuel injector?

What Are Fuel Injectors & How Do They Work

To understand the cost of replacing fuel injectors and the importance of replacing fuel injectors, it is helpful to understand the working principle of the fuel injection system. Fuel injector plays an important role in the function of an automobile engine. Here’s what they did:

  • The fuel injectors inject fuel into the cylinders of the engine.
  • Each cylinder of the engine has an injector.
  • The fuel pump sends fuel from the fuel tank to the fuel injector through the gas line.
  • Your car’s computer system sends signals to the fuel injectors to tell them how much fuel to inject into the cylinders.
  • A nozzle at the end of each injector atomizes a portion of the liquid fuel into a spray, which then enters the cylinder.
  • The cylinder then ignites to trigger the internal combustion process, providing power for the vehicle.
  • When you accelerate, the fuel injector will inject more fuel in a longer time, while when you slow down or idle, the injector will inject less fuel.

Signs of Bad Fuel Injectors

Fuel Injector Replacement

When your fuel injection system has problems, your engine will not work properly. If the problem persists long enough, it can cause significant damage and even paralyze your vehicle. Knowing the warning signal of a bad injector will help you solve it as soon as possible. Here are some tips for testing your fuel injector to see if it’s time to buy a new one.

Poor Fuel Economy and Serious Exhaust Pollution

A solid fuel injection system keeps your engine running. On the other hand, the fuel injector that needs to be replaced will cause poor engine performance. One thing you may notice if your fuel injector needs to be replaced is deteriorating fuel economy. If you find that your gasoline mileage is getting worse and worse, you should definitely ask your mechanic to check the fuel injector.

Difficult to Start (or Unable to Start At All)

If the fuel injector is blocked or damaged, your engine may not start at all. If you try to start your engine and nothing happens, the fuel injection system may be a problem, especially if your car has been running rough recently. The fuel injector that is not too blocked or partially operated may cause a slow startup, which is a warning signal that the system needs to work.

Odor of Fuel

The smell of fuel around the car is another sign of a problem with the fuel injectors. If the fuel injector is blocked or damaged, the car’s computer will tell the fuel system to send more fuel to provide the power the engine needs to run. Other problems with the fuel system, from the fuel pump to the fuel line, can also cause odor.

Rough Idling or Low Speed

If there is a problem with the fuel injector, your engine will run rougher than usual. This is usually due to the interference of fuel delivery to the cylinder. A blocked or damaged injector will cause the wrong amount of fuel to be injected into the cylinder at the wrong time. If the fuel injector does not inject an appropriate amount of fuel into the cylinder, the engine speed will be lower than usual.

How Often Do Fuel Injectors Need to Be Replaced?

Fuel injectors tend to be very reliable. On average, they can travel between 80,000 and 100,000 miles. With proper maintenance and close observation, you may be able to get your life to a higher level. If your vehicle is approaching that mileage since it was built or installed with a replacement injector, it may be time to replace the injector. If they go that far, you want them to see it.

How Much Is It to Replace Fuel Injectors?

On average, you need to pay $350 to $850 to replace your fuel injectors. The range of costs depends on many factors.

Smaller vehicles, fewer cylinders, and cheaper components will be required at the lower end of the spectrum.

Larger, higher-performance engines cost more.

You can also expect your location to take labor costs into account.

If your fuel system has other problems, such as fuel pump problems, you will have to pay more for maintenance. Depending on the specific question, you may end up paying much more than the price range listed above.

What Do You Need to Replace a Fuel Injector?

In most cases, you can replace the fuel injector with a simple set of tools at home.

  • Ratchet and sleeve set
  • Disposable gloves
  • Replace fuel injectors with seals replace fuel injectors with seals
  • Disposable or mechanical gloves
  • Gasoline + cup
  • Disposable or shop towel
  • Node pincers

How to Replace Your Fuel Injectors Yourself

Replace Fuel Injector

In order to start, you always want to start with a cold engine. When operating the engine, unplug the negative pole of the battery for safety.

  • Locate the fuel injector lines. Press down the clamps on both sides with pointed nose pliers and pull them off.
  • Use your deep socket and ratchet to remove the bolts connecting the fuel pipe to the fuel rail.
  • Remove the bolts connecting the fuel rail and the engine head.
  • Lift down the fuel rail.
  • Grasp the injectors and twist them.
  • Dip the new fuel injectors into a small cup of gasoline and screw them back in place. This helps prevent them from leaking.
  • Line the fuel rail with the new injector back to the system, so the rubber gasket lines the holes for the intake air.
  • Put the bullets back in.
  • Tighten the fuel pipe.
  • Plug the fuel injector back until the fuel injector bursts.
  • Turn on the key in the car, turn on the fuel pump, and wait for 10-20 seconds.
  • Start your vehicle.
  • Let stand for 2-5 minutes.
  • Turn off the engine and check for leaks.

Basically, the fuel injectors of most vehicles are easy to replace.


Replacing the fuel injectors is part of maintaining the vehicle. The cost of replacement includes parts and labor. Labor costs range from $200 to $300, while parts costs range from $150 to $600.

When the fuel injector needs to be replaced, knowing the cost of replacing the fuel injector and the signs of a bad fuel injector can help you prevent more serious problems. Purchase a diesel fuel injector, so that your engine can run smoothly with the excellent performance you expect.

Read the following post about spare parts replacement if you are interested!

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