The maintenance cost of the IS 300 can vary depending on several factors.

First, regular servicing like oil changes, filter replacements, and tire rotations are necessary. These routine maintenance tasks typically cost a certain amount. The cost for oil changes might range from a specific amount to another. Filter replacements also add to the expense.

Second, parts replacement is another significant aspect. If any components of the vehicle wear out or malfunction, such as brakes, suspension parts, or engine components, the cost for new parts and their installation can be considerable. High-quality brake pads and rotors can cost a particular amount.

Third, labor costs for repairs and maintenance should be considered. Skilled technicians charge for their time and expertise.

Fourth, the frequency of maintenance and the use of genuine or aftermarket parts also impact the overall cost. Using genuine parts from the manufacturer might be more expensive but ensures quality.

Regular preventive maintenance can help detect and address potential issues early, reducing the chances of major and costly repairs later.

In summary, the maintenance cost of the IS 300 involves various factors including routine servicing, parts replacement, labor costs, and the choice of parts. To get a more accurate estimate, it's advisable to consult with authorized service centers or experienced mechanics who are familiar with this specific model.