Fuel Injectors

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Buy fuel injectors online

If your vehicle's engine has started misbehaving in certain ways, it may need replacement fuel injectors. At Halfords, we're one of the UK's leading suppliers of all car parts with an extensive selection available online—and at our 600+ Halfords garages nationwide.

Read on to learn all you need to know about fuel injectors—what they do and the problems they can cause when faulty. Then, if you decide it's time to replace your fuel injectors, you're in the right place. Simply enter your car registration number and we'll guide you to the products you need.

What is a fuel injector?

Fuel injectors are also known as injection valves. Comprising a valve and an atomising nozzle, injectors feed fuel into the combustion chamber of each cylinder. That's a vital role, because the engine requires the right combination of fuel and air to function.

The air intake system controls the airflow into the engine and the fuel injector delivers the fuel, so they have to work in harmony to keep your motor running.

When fuel injectors are working properly they adjust the amount of fuel being introduced to match the variable airflow. If kept clean and well-maintained, your fuel injectors can also maximise the car's fuel efficiency and minimise pollution.

If you're an older motorist, you may associate the job of feeding fuel into the engine with the carburettor. However, fuel injectors have been gradually taking over from carburettors since the 1990s. They're simply cleaner and more efficient.

How to spot a faulty fuel injector

Fuel injectors often start to cause problems when the nozzles get clogged. Symptoms of a faulty fuel injector include:

  • Problems starting the engine
  • Engine stalling or misfiring
  • Loss of engine power
  • Rough idling with excessive shaking, jerking or vibration when the engine's running but the vehicle isn't moving
  • Poor or diminishing fuel economy

Cleaning and replacing fuel injectors

Often, such problems can be prevented by cleaning the fuel injectors every 25,000 miles. Specialist products such as Wynn’s fuel injector cleaner are available from Halfords, with different versions for petrol and diesel engines.

If cleaning doesn't work, however, replacement may be necessary. The Halfords range includes replacement fuel injectors for every car make and model. Finding the part you require is a simple matter of typing your details into our car registration tool and pressing the submit button. As well as showing you the relevant products, we'll activate our click and collect service so you can pick them up conveniently from your local Halfords.

Fuel injector FAQs

Prices vary, depending on your car's make, model, age and other factors. Why not get an exact price for any parts you need by entering your reg into our search tool?

Fitting a fuel injector requires careful attention to detail and safety. Locate the old fuel injector, usually on the intake manifold, and carefully disconnect any wires and hoses connected to it. Next, remove the bolts securing the injector in place and replace the old O-rings, ensuring a proper seal.

Gently insert the new injector into its slot, reattach and finally, double-check all connections and start your engine to ensure everything is functioning correctly.

The quick and simple way to find the right fuel injector is to type your vehicle reg into the search tool above. We'll take you straight to your perfect part.

Allowing your car to carry on running with a faulty fuel injector can damage the engine, perhaps permanently and irreversibly. At the very least you'll experience poor engine performance, use more fuel than you need to, and release toxic fumes. Even worse, having the wrong mix of air and fuel can eventually lead to carbon build-up, causing the engine to overheat and potentially burn out.