It is under the floor in the trunk unless the car has run flat tires. In that case you will not have a spare tire.
BMW 330i with the sport pack
There is NO spare tire in 2006 bmw x3
In the BMW 330Ci, the spare tire is typically stored in the trunk, beneath the carpeted floor panel. This area usually houses the spare tire along with the necessary tools for changing a tire. Depending on the model year, some 330Ci vehicles may come with a tire repair kit instead of a traditional spare tire. Always refer to the owner's manual for specific details about your vehicle.
The 2007 BMW 328i does not come with a traditional spare tire. Instead, it is equipped with a tire repair kit that includes sealant and an air compressor, located in the trunk under the floor mat. If a full-size spare tire is desired, it can be purchased separately and stored in the trunk area.
The Z4 does not have as spare tire. Run flat tires are used.
It is in the trunk where there would normally be a spare tire. The BMW 650i does not have a spare tire as it has run flat tires and does not need one.
Some BMW's are fitted with 'run-flat' tires. If it is, it is not provide/sold with a spare tire because the 'run-flats' will allow you to do 90 miles on a flat and this will be enough to allow you to drive to a garage and have the tire replaced (they can not be mended). In other words your BMW may not have a spare tire.
No, the BMW 328i series does not have a spare tire at all.
In the trunk, where spare tire is.
Run Flats?
No it doesn't
Yes, you can use a different size spare tire on a BMW Z3, but it is essential to ensure that the spare tire is compatible with the vehicle's specifications. Typically, BMW recommends using a compact spare or a full-size tire that matches the original diameter and bolt pattern. Always consult your owner's manual or a tire professional to confirm compatibility and safety when using a non-standard spare.