How often should the Fit's spark plugs be replaced?
3 Answers
The Fit's spark plugs should be replaced every 30,000 kilometers. The function of the spark plugs is: under the control of the engine computer, to introduce the high voltage generated by the ignition coil into the engine cylinder, generating a spark between the electrodes of the spark plug to ignite the air-fuel mixture, ensuring the engine operates normally. Taking the 2020 Fit as an example, it belongs to the compact car category with body dimensions of: length 4109mm, width 1694mm, height 1537mm, and a wheelbase of 2530mm. The 2020 Fit 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 131PS, a maximum power of 96kW, and a maximum torque of 155Nm, paired with a continuously variable transmission (CVT).
The spark plug replacement cycle is quite crucial for the Fit. I've been running an auto repair shop for over a decade. Honda Fit typically uses iridium spark plugs, recommended for replacement every 60,000 to 100,000 kilometers. It depends on your driving habits—if you frequently drive in congested urban areas, spark plugs wear out faster and may need replacement at 60,000 km; if you do more highway driving, they can last up to 100,000 km. Don't overlook this issue. Worn spark plugs cause delayed ignition, leading to hard starts, increased fuel consumption, and even engine lifespan reduction. Always use genuine parts that match the model when replacing. If doing it yourself, be careful—a regular wrench will do, but avoid over-tightening. Regular maintenance checks by a technician to inspect electrode gaps can help predict issues early, saving money and ensuring peace of mind. I advise customers to follow the manual's guidance—Honda's manual provides detailed intervals to avoid costly repairs from neglect. Though small, spark plugs have a big impact. After replacement, the car regains power like new.
My Honda Fit has driven over 60,000 kilometers, and it's the first time I've changed the spark plugs. Initially, I didn't pay attention to the manual, and only went for a check-up when I noticed the car was shaking during acceleration and struggling to pick up speed. After the mechanic replaced the spark plugs, the car ran much smoother, and fuel consumption also decreased. Based on my experience, I recommend changing them every 60,000 to 80,000 kilometers, rather than waiting for a problem to arise. The original spark plugs on the Fit are more durable, but city driving causes faster wear, so they should be replaced earlier. Worn-out spark plugs can lead to inefficient ignition, causing engine shaking. Since I usually drive smoothly and rarely on highways, changing them every 80,000 kilometers is ideal. The replacement process is simple—just take it to a shop for a few hundred bucks, or buy the parts and do it yourself for even cheaper, but make sure to get the correct model and brand to avoid future issues. During regular maintenance, check the spark plug electrodes; if they're blackened, replace them immediately. Don’t overlook this small detail for the sake of convenience—safety comes first.
