What are the maintenance items for 40,000 km in 4 years?

2 Answers
MacSimon
07/29/25 3:28am
4 years or 40,000 km maintenance items are as follows: 1. Transmission oil: The first transmission oil change should preferably not exceed 40,000 km, as new car break-in will produce relatively more metal shavings and impurities, increasing gear wear in the transmission. 2. Brake fluid and power steering fluid: For family vehicles driving 20,000 km per year, 40,000 km means two years of driving. Since brake fluid absorbs moisture, it can create vapor lock in extreme conditions, reducing braking efficiency and increasing driving risks. Therefore, it's recommended to change it every two years. 3. Coolant: Coolant has anti-freeze, anti-boil, and anti-corrosion properties. Most coolants require replacement every 2 years, though some automakers may use longer-lasting formulas. Please refer to your owner's manual or maintenance guide for specific replacement intervals. 4. Spark plugs: Worn spark plugs decrease ignition efficiency, leading to increased fuel consumption, reduced power, more carbon buildup, and higher risk of oxygen sensor and catalytic converter damage. Replacement every 40,000 km is recommended.
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VonAmir
08/12/25 7:18am
I just drove my car for four years to 40,000 kilometers and went for a comprehensive maintenance. Key items include changing the engine oil and oil filter first, as old oil loses viscosity and can easily wear engine components. The air filter also needs replacement because thick dust buildup affects engine air intake efficiency, otherwise fuel consumption will skyrocket. Check the cabin air filter and replace it to keep the interior air clean and hygienic. Spark plugs often need replacement at this stage, as weakened ignition can lead to slow starts and increased fuel consumption. Brake fluid absorbs moisture over time, so test it and replace if necessary to ensure braking safety. Check tires for wear, pressure, and balance to prevent high-speed blowouts or misalignment. Test the battery voltage and lifespan—it may need preventive replacement after four or five years. Inspect the cooling system for fluid level and condition to prevent overheating risks. I recommend adding a transmission fluid check to ensure smooth shifting. Spending money on these will save you money in the long run.
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