If your BMW runs for 2 minutes after the oil leaks out of it then stops running itself does this mean you need a new ENGINE cos its seized engine still but makes racket?

No, a seized engine usually doesn't run at all, even for a short time. The fact that your BMW ran for two minutes after the oil leaked out strongly suggests that the engine *isn't* seized, but it's been severely damaged by lack of lubrication. Running without oil causes catastrophic damage because the moving parts are grinding against each other without the necessary oil film to protect them.

The racket you're hearing is almost certainly the result of this damage. The extent of the damage will determine the necessary repairs. It's likely to be very expensive and could include:

* Bearing damage: Crankshaft, connecting rod, and camshaft bearings are likely to be severely worn or destroyed.

* Cylinder wall scoring: The pistons rubbing against the cylinder walls without lubrication will likely have scored them.

* Damage to the crankshaft: The crankshaft could be bent or damaged.

* Valve damage: Without oil, valves can be damaged.

While a rebuild might be possible, depending on the extent of the damage, a replacement engine might be more cost-effective. You need to have a qualified mechanic inspect the engine to determine the extent of the damage and the best course of action. Driving it any further will only cause more damage.