
items required for a new car at 25,000 kilometers: 1. Air filter: After driving approximately 30,000 kilometers, the performance of the air filter can be significantly affected, becoming clogged with dust and oil; 2. Throttle body: A small portion of the combustion gases in the cylinders may pass through the intake valves and intake pipes, forming carbon deposits at the throttle body. Over time, this can create buildup, increasing the throttle's resistance and causing issues like unstable engine idling; 3. Cabin air filter: The cabin air filter contains activated carbon, which absorbs fine particles. The activated carbon gradually diminishes over time and with usage frequency; 4. Coolant: The coolant should be replaced every 20,000 kilometers or once a year to raise the boiling point, prevent scale and rust formation, and enhance cooling efficiency.

I just had my last at 25,000 km, and I feel there are several key areas to focus on. Changing the engine oil and oil filter is absolutely essential—it's like giving the car a blood transfusion. The air filter also needs replacement, especially for vehicles that frequently drive on dirt roads, otherwise, the engine won't breathe smoothly. The cabin air filter is often overlooked; if there's a strange smell when the AC is on, it's time to replace it. The mechanic also checked my brake pad thickness and mentioned that 25,000 km is the critical period when brake pads start to wear. The tires need rotation and balancing to prevent uneven wear. The coolant and brake fluid levels should be tested and topped up if low. Finally, a full electrical and lighting check is necessary, and the wiper blades should be replaced if they're not cleaning properly.

The 25,000-kilometer is actually quite crucial. Based on my experience, it can be divided into three steps. Step 1: Basic maintenance - Replace the engine oil and oil filter, and remember to use the manufacturer-recommended specifications; don't skimp on quality. Step 2: Consumable replacement - Replace the cabin air filter and engine air filter, as these directly affect cabin air quality and engine efficiency. Step 3: Safety inspection - Focus on the brake system. If the brake fluid's water content exceeds 3%, it needs replacement. Check tire wear and pressure, and rotating them can extend their lifespan. Also, have the mechanic inspect the chassis bolts and suspension bushings, as some bolts may loosen at this mileage for a new car. The battery health should also be tested to prevent the embarrassment of a no-start situation. Don't be fooled into unnecessary services like engine cleaning—it's a waste of money.

I'm familiar with the 25,000-kilometer , let me briefly list the essentials. Engine oil and oil filter must be replaced—this is the core of maintenance. The air filter depends on its condition; replace it if dirty. It's advisable to change the cabin air filter for respiratory health. Check tire wear and pressure, and perform rotation and balancing. Measure brake pad thickness—too thin is dangerous. Have the mechanic inspect various fluids: brake fluid, coolant, power steering fluid, and top up if needed. Don't overlook wiper blades and headlight tests—safety first for rainy and night driving. Finally, tighten the chassis bolts as they can loosen over time in new cars. The whole process takes about an hour, with costs varying by brand—a few hundred yuan for regular cars.

I found that the 25,000 km requires special attention to details. In addition to the regular oil and oil filter change, don't skimp on the air filter as it directly affects the engine's lifespan. It's recommended to replace the cabin air filter twice a year, especially during spring when there's a lot of willow catkins. Tire rotation is crucial—I didn't do it last time and ended up with uneven wear on the front tires. The braking system should be thoroughly inspected, including the brake pads and brake fluid condition. For coolant, check both the freezing point and fluid level, especially for owners in northern regions. Finally, have the mechanic use a diagnostic scanner to check for error codes—new cars have many electronic systems, and some hidden issues might be detected. Remember to test drive after maintenance to listen for any unusual noises and check if the steering wheel vibrates.

At 25,000 kilometers, a comprehensive check-up is essential. Oil and oil filter replacement is fundamental to ensure engine lubrication. Dual filters must be replaced: the air filter protects the engine, and the cabin air filter safeguards passengers' lungs. Tire rotation and balancing are recommended to prevent uneven wear and vibrations. Brake system inspection is critical—check brake pad thickness and brake fluid condition. Suspension bolts should be re-tightened, as they may loosen after the break-in period. Fluid level checks are a must: coolant, brake fluid, and windshield washer fluid. Wiper blades and lights should also be adjusted for driving safety. Finally, a test drive by the technician to detect abnormalities shouldn’t be skipped—it’s the most direct way to assess performance.


