How many kilometers should the Focus spark plugs be replaced?
3 Answers
The Focus spark plugs should be replaced every 40,000 kilometers. When the owner finds scars or damage on the top of the spark plug, or signs of melting and erosion on the electrodes, it indicates that the spark plug is already damaged and should be replaced. Taking the 2021 Focus as an example, it is a compact car with body dimensions of 4647mm in length, 1810mm in width, 1468mm in height, and a wheelbase of 2705mm. The 2021 Focus features a MacPherson strut front suspension and a torsion beam rear suspension. It is equipped with a 1.5L naturally aspirated engine, delivering a maximum horsepower of 122PS, a maximum torque of 153Nm, and a maximum power of 90kW, paired with a 6-speed manual transmission.
As a seasoned expert in car repairs, I must say that the replacement interval for Focus spark plugs is generally around 30,000 to 60,000 kilometers, depending on the type you use. Copper-core spark plugs have a shorter lifespan and need replacement at 30,000 kilometers, while iridium or platinum ones are more durable, lasting 60,000 to 80,000 kilometers or even longer. Driving habits also play a significant role. For instance, frequent idling in city traffic increases ignition frequency, accelerating spark plug wear. I recommend having the technician check the electrode wear during each maintenance service. If you notice leakage or excessive carbon buildup, replace them immediately. Delaying replacement can lead to poor ignition, causing the engine to shake like it's dancing, skyrocketing fuel consumption, and resulting in more expensive repairs. Safety first—don't wait for trouble to strike. Spend a little now to avoid bigger costs later.
As a Focus owner with a 2021 model, the manual recommends replacing spark plugs every 40,000 kilometers. From my personal experience, changing them every 50,000 kilometers is better—too early is a waste of money, and too late causes issues. Last time, I delayed until 60,000 kilometers, and the engine started jerking while driving. Upon inspection, the spark plugs were already burnt out. After replacing them, the car ran smoothly again. If you don’t replace them on time, you’ll experience poor ignition, sluggish acceleration, a 10% increase in fuel consumption, and difficulty starting in winter. As a young driver, I think replacing spark plugs offers great value for money—standard ones cost just a few dozen bucks, while long-life ones are a bit pricier but extend the car’s lifespan and enhance driving pleasure.
