What maintenance should be done at 100,000 kilometers? Do the transmission oil and gear oil need to be replaced?

I've driven 80,000 kilometers. Do I need to change the transmission oil? Which brand of oil should I use?

I've reached 100,000 kilometers. Do I need to replace the clutch kit?

Does the transmission oil need to be replaced for a car registered in 2017 with over 70,000 kilometers?

What maintenance should be done at 37,000 kilometers?

What maintenance should be done at 100,000 kilometers? Do the transmission oil and gear oil need to be replaced?

What maintenance does a 2018 Jetta need at 100,000 kilometers?

It's been 40,000 kilometers with no major issues. What maintenance should be done?

What maintenance should be done when the car is about to reach 60,000 kilometers?

I have a question about maintenance. I bought my car in September 2022, and I've driven 15,000 kilometers so far. I've done maintenance 3 times and changed the oil 3 times. I feel that future maintenance doesn't need to be so frequent. If I drive 7,500 kilometers a year, should I do maintenance once a year?

What maintenance items should be done for a 2021 Santana with 65,000 kilometers?