How many kilometers does a BMW need to replace spark plugs?
2 Answers
BMW cars need to replace new spark plugs after driving 20,000 kilometers. Spark plugs are an important component of the gasoline engine ignition system. They introduce high voltage electricity into the combustion chamber and make it jump across the electrode gap to generate sparks, thereby igniting the combustible mixture in the cylinder. Steps for replacing spark plugs: Open the hood, lift the plastic cover of the engine, remove the high-voltage distributor wires, and mark the position of each cylinder to avoid confusion. Use a spark plug socket to remove the spark plugs one by one. When removing them, check if there are leaves, dust, etc. on the outside and make sure to clean them thoroughly. Place the new spark plug into the spark plug hole, turn it by hand a few times, and then tighten it with the socket. Install the removed high-voltage distributor wires according to the firing order, and then snap the cover back on.
After driving a BMW for so many years, I've found that the spark plug replacement interval is generally around every 30,000 to 60,000 kilometers. BMW officially recommends checking the specific model's manual for guidance. For example, my 3 Series manual states to replace them every 50,000 kilometers. If you delay replacement for too long, aged spark plugs can cause engine shaking and increased fuel consumption, especially noticeable in congested urban driving. Last time, I delayed replacement until 60,000 kilometers and experienced ignition failures and acceleration jerks, which required immediate attention. Now, I regularly check the spark plug condition during maintenance, using infrared tools to inspect electrode wear and prevent issues in advance. Based on experience, if you frequently drive on highways, you can delay replacement slightly longer. However, beginners should stick to the scheduled maintenance. Don't wait until the warning light comes on—it can affect the entire engine's lifespan and increase repair costs.
