What is the life expectancy of power steering fluid?

The service life of power steering fluid is typically 2 to 5 years or 40,000 to 80,000 kilometres, depending on the fluid type and operating conditions. Mineral oil-based power steering fluid is recommended to be replaced every 3 to 4 years or 60,000 kilometres, while synthetic oil-based power steering fluid, due to its stronger oxidation resistance, can last up to 4 to 5 years or 80,000 kilometres. In hot and humid climates, the fluid is more prone to oxidation and degradation, so the replacement interval should be shortened, and It is best to inspect and replace it every 2 years or 40,000 kilometres. If the fluid is found to have darkened in colour or has a burnt smell, it should be replaced immediately.