What maintenance items are required for a car at 40,000 kilometers?

[CarlosFitz]

When a car reaches 40,000 kilometers, the following maintenance items are required: 1. Replace engine oil (lubricant) and oil filter: Must be replaced every 5,000 kilometers or six months. If using full synthetic oil, it can be replaced up to every 8,000 kilometers. 2. Replace air filter and cabin air filter: The air filter and cabin air filter should be replaced every 20,000 kilometers or two years. 3. Replace fuel filter, brake fluid, and transmission fluid: For automatic transmission models, transmission fluid should also be replaced; for rear-wheel-drive vehicles, differential oil should also be replaced. 4. Tires older than four years can be considered for replacement. Brake rotors can be replaced if the brake pads have been changed three times. 5. Battery: A car battery should normally be replaced every two years. Even if the car hasn't driven 40,000 kilometers in two years, the battery should be checked for discharge.

[EvangelineAnn]

I've been driving for over ten years, and I always do a comprehensive maintenance when the car reaches 40,000 kilometers. Changing the engine oil and oil filter is a must, and the air filter should also be replaced, otherwise the engine won't breathe smoothly and will consume more fuel. Don't skimp on the cabin air filter, especially if you have kids at home—replacing it ensures no odd smells from the vents. Brake fluid needs to be tested with a tool for water content; if it exceeds 3%, it must be replaced. Check the tires for wear and uneven tread patterns, and rotate them to extend their lifespan. Spark plugs should be replaced based on their material—standard nickel alloy ones should be changed at 40,000 kilometers. Finally, don’t forget to inspect the rubber components of the chassis and suspension for cracks or oil leaks. This full service costs around 1,500 yuan, but it can keep the car running smoothly for tens of thousands more kilometers.

[LeIsabel]

My compact car just hit 40,000 kilometers, and I've completed its maintenance. Here's my experience. Basic items like engine oil and oil filter were definitely replaced—the technician mentioned that full synthetic oil is better suited for long-distance driving. The air filter was completely black when taken out, which directly affects performance, so it had to be replaced. I change the cabin air filter every 20,000 kilometers, and after replacement, the airflow feels much fresher. Tires required special attention—I had the mechanic rotate the front and rear tires and perform wheel balancing. The brake pads still had 7mm of thickness left, so they weren’t replaced, but the brake fluid was tested and renewed. The technician also noticed slight oil leakage from the front shock absorbers and recommended addressing it during the next maintenance. Finally, the throttle body was cleaned, and I could feel a noticeable improvement in throttle response. The total cost was under 2,000 RMB—much more cost-effective than buying a new car.