2009 Toyota Highlander Owners Manual - Page 454

4-3. Do-it-yourself maintenance CAUTION n Safety glasses Wear safety glasses to prevent flying or falling material, fluid spray, etc. from getting in the eyes. NOTICE n If you remove the air cleaner filter Driving with the air cleaner filter removed may cause excessive engine wear due to dirt in the air. Also a backfire could cause a fire in the engine compartment. n If the fluid level is low or high It is normal for the brake fluid level to go down slightly as the brake pads wear or when the fluid level in the accumulator is high. If the reservoir needs frequent refilling, it may indicate a serious problem. 4 Maintenance and care 427