What is the most common cause of transmission failure in Vauxhall Astra?

I recently noticed issues with shifting gears in my Vauxhall Astra, what could be causing this and how can I prevent it?

It is important to regularly check and change your transmission fluid, as old or low fluid levels can cause transmission failure.

Another common issue is a faulty transmission control module, which can cause erratic shifting and ultimately, failure.

In some cases, the issue may be with the clutch or transmission linkage, which should be inspected by a mechanic.