How often should the spark plugs be replaced on a BMW X3?
3 Answers
BMW X3 spark plugs should be replaced approximately every 40,000 kilometers. The working principle of spark plugs is: the electrode continuously generates electrical pulses, creating a high-voltage pulse that ionizes the air between the two electrodes of the spark plug, forming a spark and causing an explosion to ignite the air-fuel mixture in the cylinder, thereby starting the engine. Taking the 2021 BMW X3 as an example, its body structure is a 5-door, 5-seat SUV with dimensions of 4717mm in length, 1891mm in width, and 1689mm in height, a wheelbase of 2864mm, a fuel tank capacity of 65 liters, and a curb weight of 1860kg.
I usually drive a BMW X3 to commute, and I feel that spark plugs are quite crucial small components in a car, responsible for igniting and starting the engine. According to BMW's official manual, they should be replaced every 30,000 to 60,000 kilometers, or inspected every two years. Once, I delayed the replacement until 70,000 kilometers, and the car would shake a bit when starting, and fuel consumption also increased. Worn-out spark plugs can affect engine performance and, in severe cases, may prevent the engine from starting. It's advisable to go for regular maintenance at a 4S shop, where they will check the wear and tear of the spark plugs for you to avoid trouble on the road. I personally replace them every 50,000 kilometers, and the car runs much smoother. By the way, the engines of BMW X3 from different years may vary, so it's best to check the manual for your specific model.
I've been driving for over a decade, and the spark plug replacement interval for the BMW X3 is around 40,000 kilometers. Once the spark plugs wear out, the car will feel sluggish, with slow throttle response, and prolonged neglect will waste fuel. The engine design is sensitive to spark plugs, especially BMW's turbocharged engines, which are more prone to carbon buildup. When replacing them, I recommend using genuine parts—they're more expensive but more durable. Driving habits also play a crucial role. I often drive on highways, so my spark plugs wear out faster than in city traffic with frequent stops. If the car starts shaking or the check engine light comes on, it might be a spark plug issue—address it promptly to prevent damage to the ignition coils. During maintenance, the technician will advise if replacement is needed, so don't wait until problems arise to act.
