Engine Maintenance
Spark Plug Replacement
Misfires, rough idling or poor fuel economy? We replace worn spark plugs with the correct manufacturer-spec plugs for your engine. Serving Hayes, West London and surrounding areas.
~1 Hour
Typical job time
OEM Spec
Manufacturer-spec plugs
All Makes
Petrol & hybrid engines
No Surprises
Quote agreed up front
What's included
Our Spark Plug Service
- New spark plugs fitted to manufacturer specification
- Correct torque settings applied to every plug
- Ignition coils and leads visually inspected
- Old plugs inspected for signs of engine issues
- Engine idle and running quality checked after fitting
- Fault codes cleared and road-checked where needed
Warning signs
Do Your Spark Plugs Need Replacing?
Engine misfires
Stuttering, shaking or a sudden loss of power under acceleration is the classic sign of a worn or fouled spark plug.
Rough idle
If the engine feels lumpy or vibrates at a standstill, one or more plugs may not be firing cleanly.
Poor fuel economy
Worn plugs burn fuel inefficiently — if you're filling up more often than usual, plugs are a common cause.
Hard starting
Extended cranking before the engine catches, especially on cold mornings, often points to tired spark plugs.
Common questions
Spark Plug FAQs
How often should spark plugs be replaced?
It varies by engine and plug type — standard plugs typically last 20,000–30,000 miles, while long-life iridium or platinum plugs can last 60,000–100,000 miles. We follow your manufacturer's schedule and can check your service history to confirm when they're due.
How long does spark plug replacement take?
Around an hour for most engines. Some engines with restricted access (certain V6s or engines with intake manifolds over the plugs) can take longer — we'll confirm the time when you book.
Does my diesel car have spark plugs?
No — diesel engines use glow plugs instead, which help cold starting. We check and replace glow plugs too, so if your diesel is struggling to start, get in touch.
Will new spark plugs improve performance?
If your current plugs are worn, yes — you'll typically notice smoother idling, better throttle response and improved fuel economy. New plugs won't add power beyond factory spec, but they restore how the engine should feel.
Get in touch
Get a Spark Plug Quote
Send us your reg plate and we'll confirm the right plugs and price for your engine. 235 Yeading Lane, Hayes, UB4 9AD.