Why is my Vauxhall Astra making strange noises when I start the engine?

I have noticed that my Vauxhall Astra is making strange noises when I start the engine. It sounds like a knocking or grinding sound. What could be causing this and how can I fix it?

The most likely cause of this strange noise is a faulty starter motor. This is a common issue in Vauxhall Astra models and can be fixed by replacing the starter motor. I recommend taking your car to a certified mechanic to properly diagnose the issue and perform the necessary repairs.

Another possible cause could be a damaged flywheel. This is a more serious issue and will also require a trip to the mechanic. A damaged flywheel can also cause problems with other components in your car, so it's important to get it fixed as soon as possible.

If the knocking noise is coming from your dashboard, it may be an issue with your air conditioning system. This could be a faulty compressor or a loose belt. Again, I recommend taking your car to a mechanic to properly diagnose and fix the issue.