Why is my Vauxhall Astra making a strange noise when I turn it on?

My Vauxhall Astra has started making a whirring noise every time I turn the key in the ignition. It seems to be coming from the engine area and gets louder as I accelerate. What could be causing this? Is it safe to drive?

It's possible that your serpentine belt may be worn or damaged, causing the whirring noise. It's best to have it checked and replaced if necessary to avoid any further damage to your engine.

Another possible cause could be a faulty alternator or starter motor. I would recommend taking your vehicle to a trusted mechanic for a proper diagnosis.

If the noise only occurs when you turn on the AC, it could be a problem with the AC compressor. I suggest bringing your car to a certified technician to have it looked at.