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How to Change Car Spark Plugs

Model: Ford Focus MK 1 - Years 1998-2004
Part: Spark plugs

Changing the spark plugs in a car is a very simple procedure. You will need: an air compressor, new spark plugs, and a spark plug socket. First, disconnect the seal system connector and clean it with some compressed air. Next, use a suitable screwdriver to remove the old spark plug, which will be noticeably more worn, and replace it with the new one. If you are unsure of the size to use, you can check the label attached to the bonnet of the car. At this point, carefully insert the new spark plug and screw it in tightly. Finally, reconnect the connector. Repeat the same procedure for all spark plugs.

Updated on 23 February 2026 by ScegliAuto

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