When I bought my Saab 93 the tool for taking the locking wheel nut off was missing. I've found someone who supplies them, but they say I need the key / security number (four digits starting with 2). Does anyone know how I can find this number or get the tool for the wheel nut in any other way, please? I have a slow puncture and I need to get it fixed. Thanks.

The four digit security number is on a stick label. I have found mine in various places on the cars. Once in the plastic box that the wheel bolts are supplied in. The dealer left the label in there with the key. I've also had the label stuck into a page in the service book. And once left loose in the glovebox.

If all those fail, you could possibly get the number from the original Saab selling dealer. But probably the best way is to get a new set of bolts and get the tyre place to remove the old ones with their "removal tool".

If you have the old locking bolts with the three holes in them, the pins on key break off. The newer style with the crinkly ring are stronger.

Have a look at these:

Old style (http://www.elkparts.com/product_info.php/products_id/1077)

New style (http://www.elkparts.com/product_info.php/products_id/684)

The code for mine is in the Saab database against my registration number, same place as the service history of the car - the dealer input the code when he supplied them. So you should give your local dealer a call and see if there is anything registered against your car.