
Oil filter, air filter, cabin air filter, engine oil, coolant, brake fluid, etc. Definition of car maintenance: Car maintenance refers to the preventive work of regularly inspecting, cleaning, replenishing, lubricating, adjusting, or replacing certain parts of the car, also known as car servicing. Contents of major car maintenance: Major maintenance refers to the routine maintenance performed at the time or mileage specified by the manufacturer, which includes replacing the engine oil, oil filter, air filter, and fuel filter. Interval of major car maintenance: Major maintenance is based on the existence of minor maintenance, and these two types of maintenance are generally performed alternately. The interval varies depending on the car brand, so please refer to the manufacturer's recommendations for specifics.

I've been driving the BMW X3 for just over a year now, and the maintenance schedule is quite systematic. Every 5,000 kilometers, it's essential to check tire pressure and basic fluid levels to ensure the wheels aren't worn or misaligned. At every 10,000 kilometers, an oil change and oil filter replacement are mandatory, along with inspecting brake pad thickness and brake fluid levels—this keeps the engine running smoothly and fuel-efficient. Every 20,000 kilometers requires replacing the air filter and cabin air filter to improve in-cabin air quality for greater comfort. The major 40,000-kilometer service involves spark plug replacement and drivetrain inspection, including transmission fluid renewal. Regardless of mileage, an annual comprehensive diagnostic is recommended—using iDrive to scan for faults helps catch minor issues early, saving significant costs. Developing regular maintenance habits not only reduces repair expenses but also ensures peace of mind while driving, especially crucial for luxury vehicles where proper upkeep should never be compromised for convenience.

The BMW X3 maintenance schedule emphasizes a structured cycle. Based on my experience, every 10,000 kilometers, basic items like oil change with filter replacement are required, along with tire rotation and balancing. Every 20,000 kilometers, the air filter and cabin air filter should be replaced to ensure smooth engine breathing. Every 40,000 kilometers involves spark plug replacement, brake fluid change, and four-wheel alignment inspection. Every 80,000 kilometers, a major overhaul is needed, including transmission fluid, differential oil change, and a comprehensive chassis scan. In terms of time, coolant replacement and brake system inspection should be done every two years. This routine enhances vehicle performance and extends lifespan. Regular maintenance reduces sudden electrical or mechanical failures, ensuring stable driving. Spending a little to prevent major losses is cost-effective.

I believe the most crucial aspect of BMW X3 maintenance lies in safety upkeep. Check tire pressure and lights every 5,000 km, and ensure brake inspections every 10,000 km to maintain quick responsiveness and prevent failures. The core of engine maintenance is changing the oil every 10,000 km to prevent overheating and wear. Conduct a full inspection of the lighting system every six months to avoid nighttime risks. Scheduled items like spark plug replacement every 40,000 km prevent performance lag and loss of control, while a chassis scan every two years helps detect looseness early, saving on major repair costs. The key is periodic prevention rather than emergency fixes—don’t wait for problems to arise. Cultivating inspection habits ensures confident and safe driving.


