Many new Lexus today use long-life antifreeze that doesn’t need to be changed for a decade, while older models might need a flush every couple years.

Besides keeping your Lexus from freezing in the winter and overheating in the summer, coolant or antifreeze has ingredients that act as lubricants to prolong the life of the water pump and seals. It also has protective inhibitors that work year-round. However, when this antifreeze breaks down over time and from heat, it can become acidic and be harmful by corroding or eating away at your car’s internal engine components.