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Top Mechanics For Spark Plug Change & Replacements

64 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...

117 Reviews

Garage in Tunbridge Wells, 15 years of experience

I'm a mobile mechanic with wide range of experience with diagnostic , repair , electrical and electronics in automotive industry with 15 years of experience.

327 Reviews

Garage in Birtley, 15 years of experience

I began my career with Citroen/Peugeot in Newcastle though the apprenticeship scheme and served my time there for 4 years. I moved to Prestige Cars in Gateshead for 18 months before gaining more experienc...

108 Reviews

Garage in Stoke On Trent , 10 years of experience

Hy there my name is Lucian and I'm the owner of IFIX SELFSERVICE GARAGE located in Stoke on Trent .In ours facilities you can find the best mechanics services with over ten years experience ! General mechan...

195 Reviews

Garage in Chelmsford, 10 years of experience

I pride myself on my work making sure I carry out all work to a excellent standard, I have been in the motor trade for 9 years plus. I started at fords as an apprentice and became a fully qualified mechanic/...

16 Reviews

Mobile mechanic in Newport, 20 years of experience

Light vehicles maintenance and repairs HGV experience Plant and forklift experience Capable of changing timing belts, diagnostic and most repairs

45 Reviews

Garage in Portsmouth, 21 years of experience

Over the years I have worked in various garages, carrying out mechanical repairs, including, servicing, general repairs, mot repair, cambelts/timing chains, clutches, head gaskets, engine replacements etc I ...

42 Reviews

Garage in Manchester, 12 years of experience

Over 12 Years Exlerience Through Various Dealers & Independent Garages. Progressing through management Programmes and Gaining a wealth Of experience & Qualifications

80 Reviews

Garage in London, 7 years of experience

I work on clutches, full services, suspension and exhaust system, tyres, brakes and breakdown services.

27 Reviews

Garage in Enfield, 10 years of experience

Been associate with this trade for over 10 years. Currently working as a Mechanic/MOT Tester. Work on all makes and models. Routine maintenance activities include, but not limited to, servicing (Oil & Filte...

KELVIN 7th March 2024

Vauxhall Corsa • Additional work following previous booking

120 Reviews

Mobile mechanic in Kingsheath , 22 years of experience

Welcome to FCG MOTORS, your local, friendly and independent mobile mechanic. We are based in Birmingham. We cover the Birmingham area and surrounding areas on a mobile basis, so we come to you at your ho...

1237 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...

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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