If you love your Fiat, Alfa Romeo, or Maserati, the spark plug is one of the tiny parts that makes a huge difference. It’s the piece that creates the spark to fire the fuel and air mix, so a good plug means smooth starts, better fuel economy, and more power. In this guide we’ll show you how to pick the right plugs, spot the signs of wear, and replace them yourself.
First, check your owner’s manual – it lists the exact type (size, heat range, and electrode design) the engine needs. Italian engines often use Iridium or Platinum plugs because they last longer and give a clean spark. If you’re after a little extra performance, look for a plug with a colder heat range; it can handle higher revs without overheating.
When you shop, compare the part number on the old plug with the new one. Reputable brands like NGK, Bosch, and Denso match the OEM specs. Don’t fall for cheap, generic plugs – they may fit but will wear out fast and could cause misfires.
Typical plug life is 30,000 – 60,000 miles, but you’ll know it’s time early if you notice any of these symptoms:
If you see any of these, pull a plug and inspect it. A worn electrode looks rounded or eroded, and heavy carbon deposits appear dark and crusty. That’s a clear sign to replace the whole set.
Replacing spark plugs yourself is straightforward. You’ll need a spark plug socket, a ratchet, and a torque wrench. Make sure the engine is cool, disconnect the ignition coil or plug wire, and turn the old plug counter‑clockwise. Install the new plug by hand first to avoid cross‑threads, then tighten to the manufacturer’s torque (usually around 13‑20 Nm). Re‑connect the coil, start the engine, and listen – it should run smoother.
After a replacement, reset any engine codes if the check engine light came on. Most modern cars clear the code automatically after a few drive cycles, but a quick scan with an OBD‑II reader won’t hurt.
Keeping your spark plugs in good shape also means checking related components: the ignition coil, fuel filter, and air filter. A dirty air filter forces the engine to work harder, which can foul the plugs faster.
For Italian cars, many owners prefer to stick with OEM‑spec plugs. The performance gains from “aftermarket” high‑performance plugs are often negligible, and using the wrong heat range can damage the engine. If you’re unsure, ask a specialist or contact our support team – we stock the exact plugs for every Italian model.
In short, the spark plug is a small but mighty part. Choose the right type, replace it at the right time, and follow a simple DIY process to keep your car humming. Your next drive will feel smoother, your fuel bill lower, and your engine will thank you.
