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Top Mechanics For Spark Plug Change & Replacements

241 Reviews

Garage in Sandhurst , 25 years of experience

I started my career at 16 years old at a ford main dealer studying for my qualifications at the same time. Moved from ford and started building cars for films (And in the back ground started as a part tim...

7 Reviews

Garage in Coventry, 10 years of experience

I have mostly worked in main dealer and well known bodyshops in the past. Capable of doing mechanical work, stripping & refitting body panels and airbags components. I have got all rounder skill and exper...

R&D

31 Reviews

Garage in London , 5 years of experience

I have more then 5 years of work experience with vast makes of vehicles. I am specialized in diagnostic, programing and inspecting and fixing Mechanical components of various vehicles.

32 Reviews

Garage in Hemel Hampstead , 10 years of experience

Mobile and garage-based mechanic covering the Hemel Hampstead area. Fully qualified with all the relevant diagnostics machines.we provided a pick up and drop off vehicle service whit our tow truck So if ...

67 Reviews

Garage in Essex, 28 years of experience

I have worked for various main dealers and independent garages along with having my own business.

47 Reviews

Garage in Liverpool, 13 years of experience

Hello, I'm Alan. I am a experienced mobile mechanic and garage owner that serves Liverpool, and surrounding areas. I have years experience in the trade and industry, working on vehicles such as HGV for lead...

41 Reviews

Garage in London, 10 years of experience

Welcome to DMG Autocentre, where automotive excellence meets unparalleled experience. With a combined 40 years in the auto repair industry, our seasoned team stands as a beacon of expertise, ready to address...

643 Reviews

Garage in Woking, 12 years of experience

I started my career with Kwik-Fit when I was 16 for a number of years understanding the trade. I moved to work for a few independent garages for around 4 years before working with Vauxhall for 3 years and su...

14 Reviews

Garage in Birmingham , 15 years of experience

Hi, my name is marcus. I am a highly qualified mechanic with over 15 years experience. I am friendly, polite, reliable and efficient. Your safety is of the utmost importance . I take pride in my work and ...

218 Reviews

Mobile mechanic in Doncaster, 15 years of experience

Having done my apprenticeship in an independent garage for 5 years then spending the Last year of the apprenticeship at Volkswagen and spent 7 years thereafter. Left VW for Peugeot then BMW for couple years....

22 Reviews

Garage in Woking, 8 years of experience

Mobile mechanic service with 8 years workshop experience. Friendly, polite and knowledgeable in all work carried out. All aspects of work carried out from pre-MOT to clutch and cambelt replacement.

17 Reviews

Garage in Nottingham , 12 years of experience

4 years mr clutch auto center 1 years 2 months DNA auto care 1 year Nottingham auto center"

1247 Reviews

Garage in Darwen, 14 years of experience

I started my apprenticeship when I left school at the age of 15. I’ve been fully qualified for 11+ years with NVQ level 1, 2 and 3. I’ve been an MOT tester for 10 years. Here at Jamie’s mobile mechanic w...

69 Reviews

Garage in Leeds, 5 years of experience

Brakes, Suspension, Exhausts and Servicing - All at your home or work address! I am a highly rated mobile mechanic covering Leeds and surrounding areas, I respect all of the vehicles I work on and take p...

Frequently asked questions about spark plug change & replacements

Read our answers to questions about spark plug change costs, symptoms and more.

What does a spark plug do?

The engine's spark plugs provide the spark in the combustion chamber to detonate the fuel and air mixture in order to force the piston back down and thereby rotate the crankshaft.

What does a spark plug replacement involve?

  • Mechanic will read the ECU for possible fault codes related to the ignition system.
  • Mechanic will inspect the ignition system and spark plugs.
  • If necessary, the mechanic will replace the full set of spark plugs
  • Mechanic will advise if any other parts need to be replaced.
  • Mechanic will check if the ignition system works correctly again and will test drive the car.

Can I replace spark plugs on my own?

Unless you are a qualified mechanic with the required skills, training and equipment to do the job, we strongly recommend a spark plugs change is only carried out by a professional mechanic. ClickMechanic can help get you a vetted and local mechanic to carry out the work. Just enter your postcode and your car's registration number at the top of this page and select the work needed to get an instant fixed price up front.

What are the symptoms of bad spark plugs?

The main symptoms that can occur when there is a faulty spark plug are;

  • When starting the car is problematic.
  • When the engine cuts out after starting.
  • When the engine does not run smoothly (the engine misfires).
  • When the car vibrates excessively.
  • When the 'Check Engine' light on the car's dashboard is on.

How long will a spark plugs change take?

On average a spark plugs change will usually take 1 hour, but can take anywhere from under 1 hour to 1.5 hours. The time that the job takes will depend on a range of factors. For example, your vehicle's make and model, year, as well as other factors. Select your car at the top of this page for information on job time and cost for your vehicle through ClickMechanic.

How often should you change spark plugs?

Spark plugs are critical to the smooth running of an engine. Without them, the engine will simply not work as it should, if at all. Therefore as soon as you are advised that the spark plugs need changing, you should do so. Running an engine with a faulty spark plug can also cause additional wear and tear on other items.

Spark plugs are always replaced as a set and not done individually.

How can I extend the life of my spark plugs?

The only thing you can do in reality is to use good fuel as this will improve the combustion and prevent the build up of deposits.

Manufacturers service schedules for spark plug changes should be adhered to all tie to prevent issues from arising with older plugs.

Can you drive with a bad spark plug?

If you suspect there is any issue with a spark plug or if there are concerns about its age or condition, book with a professional mechanic as soon as possible to get it checked and replaced if necessary, driving the vehicle may lead to further complications. Bad spark plugs can cause engine misfires and lead to potential engine damage and overheating of the catalytic converter.

What do spark plugs do?

Spark plugs are used to create a spark that ignites the air-fuel mixture in the engine's cylinders, which in turn powers the engine.

What type of spark plugs do I need for my car?

The type of spark plugs you need for your car depends on the make, model, and year of your vehicle. This information can usually be found in the owner's manual or by using online part finders such as Bosch Aftermarket and NGK part finder. You can also input your reg number and postcode on our website and we'll get you a price for the correct spark plugs replacement for your vehicle.

What happens if I don't replace spark plugs?

If you don't replace spark plugs periodically, they will eventually wear out and will no longer be able to create the spark necessary to ignite the air / fuel mixture in the engine. This will cause the engine to misfire, lead to poor fuel economy and in some cases the car may not start at all.

When spark plugs are faulty they can cause damage to the catalytic converter as well, and lead to an increase in harmful emissions.

How long can you drive with faulty spark plugs?

While you are technically able to drive a few thousand miles with faulty spark plugs they can cause multitude of problems such as poor fuel economy, reduced performance and even damage to the engine. It is highly recommended to get them replaced as soon as possible.

Should I replace all spark plugs at the same time?

It's generally advisable to replace all of the spark plugs at the same time since they will most likely have the same amount of wear. This also helps ensure that all of the spark plugs are firing as they should together, which can help improve engine performance considerably.

Does replacing spark plugs improve performance?

Replacing spark plugs does improve performance. New spark plugs can improve the performance of your car’s engine by up to 30% as suggested by the National Institute for Automotive Service Excellence. This is because fresh spark plugs help improve the combustion cycle of the engine, which makes your car’s engine more efficient.

Can you change the spark plugs without changing the wires?

Yes, you can change spark plugs without changing the wires, but it's not recommended. Over time, spark plug wires wear out and become less effective at conducting electricity. This can cause engine misfires.

Are faulty spark plugs an MOT failure?

Faulty spark plugs may cause an MOT failure if the engine is not running smoothly, or if the spark plugs are excessively worn. If you suspect the spark plugs may be faulty, it is best to get them all replaced before the MOT test.

How much does it cost to get spark plugs and wires changed?

On average a spark plug change costs around £85. Depending on the damage caused to the wires, they will also need to replaced which bring the average total cost to about £100. As this cost will change depending on the make and model of the car, you can get an exact price for your car by entering your postcode and vehicle registration number at the top of the page.

What happens if I don't replace spark plugs?

If you don't replace spark plugs, the vehicle will eventually have starting and performance problems. The engine will run less efficiently, and it may be difficult to start the vehicle. In a worst-case scenario you can even expect the car to not start at all.

Is it worth buying expensive spark plugs?

Whether it's worth buying expensive spark plugs will often depend on the type of metal used to manufacture the spark plugs.

Currently iridium spark plugs are the most expensive on the market as they're made of rare earth metal. Iridium plugs typically last longer, have a higher melting point, and create a more powerful spark. This means they help your car’s engine run better, and they last longer.

In fact, many iridium plugs come with a 20,000-mile guarantee, which means you can often go years without changing your plugs.

How much does it cost to have your spark plugs changed?

On average a spark plug change costs around £85. Typical prices can range anywhere from £55 to £125. Ultimately, the cost depends on your car and what parts your car's manufacturer recommends using for the replacement. Find out what you could save by having the spark plugs replaced by ClickMechanic by selecting your car at the top of this page!

Check out the ClickMechanic price for a spark plug change. See the averages for different makes below. We consolidate industry standard data with millions of data points to give you the most accurate price. These estimates may include Spark plug.

Estimates on average repair costs, such as the above results for a spark plug change, are based on ClickMechanic's quote data which combines multiple third-party sources. Actual costs may vary. We provide estimates on average repair costs for information only and accept no liability for any inaccuracies or errors. If you think an estimate is incorrect, please contact us to let us know.

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