What needs to be replaced at 20,000 kilometers for a car?

[Blake]

The following parts need to be replaced at 20,000 kilometers for a car: 1. Replace engine oil and oil filter: Due to the harsh high-temperature and high-pressure environment inside the engine, the shelf life of engine oil is significantly shortened, and its performance greatly declines. Over time, it fails to protect the engine. The oil filter prevents impurities from mixing into the oil, which can cause oxidation, leading to the formation of gum and sludge that can clog the oil passages. Both the engine oil and oil filter should be replaced simultaneously. 2. Replace the air filter: If it was not replaced during the 10,000-kilometer maintenance, it must be replaced at the 20,000-kilometer maintenance. The air cleaner's function is to block dust and particles inhaled by the engine during the intake process. If the filter is not cleaned for a long time, it can lead to dust being sucked into the engine, causing abnormal wear on the cylinder walls. 3. Replace the spark plugs: If the car uses standard material spark plugs, preparations should be made to replace them at 20,000 kilometers. Spark plugs directly affect the engine's acceleration performance and fuel consumption. When you feel that the engine lacks power while driving, maintenance should be performed. The service life of spark plugs varies depending on the material used.

[MacFaith]

During my last maintenance at 20,000 kilometers, I specifically consulted the advice of an experienced mechanic. Engine oil and oil filter must be replaced—this is fundamental to ensuring smooth engine operation, so don't skimp on these small expenses. The air filter depends on the situation; since I drive on dusty roads often, I replaced it directly—it's not expensive anyway. The cabin air filter is recommended for replacement, especially for someone like me who frequently transports children—respiratory health is more important. Rotating the tires ensures even wear across all four wheels, extending their lifespan. Brake fluid needs to be checked for water content; if it exceeds 3%, it must be replaced. Coolant levels and color should also be inspected—top it up if it's low. Finally, have the mechanic check the chassis and suspension to ensure there are no unusual noises. A car is like a person—regular maintenance is key to keeping it running for a long time.

[SavannahRose]

I just completed the 20,000-kilometer maintenance for my car, mainly changing the engine oil and oil filter. The mechanic said that after the break-in period, timely replacement is even more crucial to prevent carbon buildup. I always replace the cabin air filter, especially during pollen season when respiratory sensitivity is high. The engine air filter was checked and found to be dirty, so I replaced it with a new one. Pay special attention to the thickness of the brake pads—if they're too thin, it can be a safety hazard. The tires were rotated front to back to prevent uneven wear. The coolant and brake fluid were tested and found to be in good condition, so they weren’t replaced. I recommend checking the maintenance manual, as requirements can vary by brand. Small components like windshield wipers should be inspected carefully, as rubber deterioration can affect visibility in rainy conditions.

[BrodyRose]

In my experience, changing the engine oil and oil filter every 20,000 kilometers is sufficient. Also, check the cabin air filter and engine air filter. Replacing the cabin air filter yourself is very convenient—just buy one online for a few dozen yuan. If the engine air filter is heavily soiled with dust, it should be replaced as well, as it affects air intake efficiency. Rotating the tires front-to-rear is necessary to avoid uneven wear. The brake fluid was tested for moisture content and found to be normal, so it wasn’t replaced. Only half a liter of coolant was topped up. The key is to have the mechanic check the brake pad thickness and for any loose chassis bolts, as these small details impact safety. Other maintenance items should be decided based on actual conditions—no need for excessive upkeep.