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The maintenance guide for the 2012 Toyota Highlander is quite thorough and it's important to adhere to it to prevent any issues with the vehicle. By staying on top of the maintenance tasks, you can also lengthen the lifespan of the vehicle. For instance, at every 5,000 miles or every 6 months, whichever comes first, it's recommended to check all fluid levels, change the engine oil and oil filter, rotate the tires, and inspect the brake linings/drums as well as the brake pads/discs. Similarly, at every 15,000 miles or every 18 months, whichever is earlier, it's advisable to re-torque the propeller shaft bolt, examine the ball joints, check the coolant, and review the transfer case oil. Additionally, at every 30,000 miles or every 36 months, whichever is earlier, it's necessary to swap out the cabin air filter and change the engine air filter.
The 2012 Toyota Highlander's regular maintenance plan includes basic coverage for 36 months or 36,000 miles for all parts except those subject to regular wear and tear, and powertrain coverage for 60 months or 60,000 miles for key components like the engine, transmission, drivetrain, seatbelts, and airbags.