What are the maintenance items for the Highlander at 40,000 kilometers?

[FinleyRose]

The main maintenance items for the Highlander at 40,000 kilometers include replacing the engine oil, three filters, and all vehicle fluids, as well as some necessary routine inspections. For example, replacing the brake fluid, transmission fluid, power steering fluid, and coolant. Replacing the engine oil and oil filter is a mandatory item. Below is an introduction to the replacement of the oil filter and spark plugs: 1. The oil filter is used to prevent impurities from mixing into the engine oil, causing oxidation and producing gums and sludge that can clog the oil passages. Both the engine oil and the oil filter should be replaced simultaneously. 2. The air filter should be replaced every 10,000 to 15,000 kilometers. 3. If the spark plugs have never been replaced before, they must be replaced during the 40,000-kilometer maintenance. 4. Analysis of the spark plugs shows that they may not have completely failed at 40,000 kilometers, but the ignition performance of the spark plugs has significantly decreased, directly affecting the engine's power, performance, and fuel consumption.