How Often Should the Spark Plugs Be Replaced on a Toyota Corolla?
2 Answers
Toyota Corolla spark plugs should be replaced every 80,000 to 100,000 kilometers. Spark plugs are a crucial component of the gasoline engine's ignition system, responsible for introducing high-voltage electricity into the combustion chamber and generating a spark by jumping the electrode gap to ignite the combustible air-fuel mixture in the cylinder. The Toyota Corolla is a compact car with body dimensions of 4635mm in length, 1780mm in width, and 1455mm in height, a wheelbase of 2700mm, and a fuel tank capacity of 50 liters. It is equipped with a 1.2T turbocharged engine, delivering a maximum power of 85kW, with the maximum power output achieved at 5200 to 5600 rpm.
I've been driving a Toyota Corolla for several years. The replacement interval for spark plugs is generally between 60,000 to 100,000 miles, depending on your driving habits and manual recommendations. My car is a 2018 model, and the manual suggests checking them every 80,000 miles—if they're fine, you can keep using them, but most mechanics recommend replacing them around 100,000 miles. Failing to replace spark plugs can lead to poor ignition, noticeable engine shaking, and increased fuel consumption. I once delayed it and ended up with unstable idling on the highway, nearly breaking down. The repair later cost me hundreds extra. Additionally, regular checks allow you to inspect if the air filter is too dirty and affecting performance. Safety first—don’t skimp on small savings only to lose big later. Just have the mechanic check the spark plugs during routine maintenance.
