Why does TSI require spark plug replacement at 20,000 kilometers?
2 Answers
Because after twenty thousand kilometers, slight carbon deposits will form on the spark plug electrodes, affecting the spark generation and causing the vehicle to feel underpowered with slower acceleration response. Here are signs indicating the need for spark plug replacement: 1. Difficulty starting the vehicle: The specific manifestation is that the engine requires multiple ignition attempts to start, and it is prone to stalling when idling. If these two situations occur, it is highly likely that the spark plugs are faulty. 2. Engine idle vibration: When the engine is idling, if there is noticeable and regular vibration, it could indicate a problem with the spark plugs. Of course, idle vibration might also be caused by issues like carbon buildup, which requires visiting a 4S shop or repair shop for thorough inspection. 3. Weak vehicle acceleration: When rapid acceleration is needed but the engine seems unable to keep up, accompanied by engine vibration and increased fuel consumption, this could also signal a problem with the spark plugs.
I found that the 20,000-kilometer spark plug replacement interval for TSI engines is primarily due to their turbocharging and direct fuel injection design. These technologies make engine combustion more efficient but also significantly increase pressure and thermal loads, causing spark plug electrodes to erode or accumulate carbon deposits more easily. If not replaced on time, failed spark plugs may lead to engine misfires, power loss, or a sharp increase in fuel consumption, and in severe cases, damage other components such as catalytic converters. Manufacturers set this short interval based on rigorous testing to ensure reliability and emission compliance. Every time I service my car, I insist on this maintenance, and the car noticeably runs smoother, saving me from potential troubles. This is not just a technical requirement but also fundamental protection for driving safety.
