A Toyota technician specializing in diagnostics offers tips on how to prevent major repairs and problems by focusing on key maintenance tasks to ensure your Toyota can last over 300,000 miles. The video covers important maintenance items that drivers often overlook, such as engine oil changes, transmission fluid replacements, and other fluid and component upkeep like differential and power steering fluids, brake fluid, and spark plugs. The technician also provides recommendations for tools and resources to help with maintenance tasks.