Compare Mobile Spark Plug Replacement Prices Near You

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*Some mobile technicians (that come out to you) may require an upfront payment or commitment, please check this with them first.

These are just some of the reasons to choose a mobile mechanic through BookMyGarage, so enter your reg and postcode to compare mobile mechanics near you and have your spark plugs replaced at home or work. We're here to make things simple and stress-free, so you can book with confidence and look forward to the results.

How Much Does a Mobile Spark Plug Replacement Cost?

A mobile spark plug replacement can cost anywhere between £50 and £250, depending on how many spark plugs your engine has, the type it needs and how easy they are to reach.

Your engine has one spark plug per cylinder and they're replaced as a set, so a small three or four-cylinder car costs less than a larger engine. Copper plugs are the cheapest to buy, while platinum and iridium plugs cost more but last longer. Labour depends on access, as some plugs sit right on top of the engine and others are tucked under other components.

Typical UK costs based on published industry estimates as of 21st October 2026. Prices are representative figures only as costs vary depending on your make and model, the parts used and your chosen mobile mechanic. Enter your reg and postcode to compare options from local mobile mechanics for your exact car.

Can a Mobile Mechanic Replace My Spark Plugs?

Yes, on most petrol cars, and it can be done wherever your car is parked. Where the spark plugs sit on top of the engine, it's usually a quick job. It takes longer on engines where some of the plugs are buried under other parts, such as V6 and boxer engines, and your mechanic will let you know what's involved for your car.

Spark plugs are only fitted to petrol engines. If you drive a diesel, your car uses glow plugs instead.

Warning Signs to Look For

Worn spark plugs usually give some warning before they cause real problems. Common signs are:

• The engine misfiring, felt as a jolt, hesitation or brief loss of power

• A rough or uneven idle when you're stationary

• Difficulty starting the car

• Sluggish acceleration

• Using more fuel than usual

• The engine management light coming on

A misfire can have more than one cause, so if your engine management light is on and you're not sure your spark plugs are to blame, you can book mobile car diagnostics to find out what's triggering it.

If you notice any of these warning signs, enter your reg and postcode to compare mobile mechanics in your area, all in under 60 seconds.