At how many kilometers should a motor vehicle undergo major maintenance?

[LeBella]

Motor vehicles should undergo major maintenance every 20,000 to 30,000 kilometers. The major maintenance items include: 1. Changing the engine oil and oil filter; 2. Replacing the air filter and fuel filter; 3. Checking the performance of lighting, warning lights, turn signals, and car horn; 4. Inspecting the performance of the windshield wiper and cleaning system; 5. Checking the clutch pedal travel; 6. Inspecting the rear wheel hub bearing clearance and lubrication condition; 7. Examining the condition of the spark plugs; 8. Verifying the integrity of seat belts; 9. Checking for any damage to the exhaust system; 10. Inspecting the steering tie rod end joint clearance, tightness, and the sealing of dust boots.