Fuses are generic, you can get them from any auto parts store, their different ratings and sizes( 10, 20, 30 amps-mini, maxi, ato fuses)
The Beamer
I just bought a 2002 BMW 325i and had the exact same problem. I took the car to BMW and they said that whoever had the car before had it apart and did not reset the sensors. They reset the sensors and it worked fine for a couple of days. I put in a cheap one at Best Buy. BMW told me that if it was a blown fuse the radio will not turn on. A BMW replacement Business CD Player will cost you upwards of a thousand dollars.
I just bought one for my sons car it was about $100 but a project to do You can buy a BEHR OEM thermostat with Housing for $55 from several online parts stores: http://www.partsgeek.com/mmparts/thermostat/bmw/325i.html
Any dealership should take it. Check blue book & you can sell it to Car Max & use proceeds to buy anywhere which is even better.
They will only fit with minor modification. Scion TCs' bolt pattern is 5 x 100. BMW uses a 5X120 bolt pattern. Only way for it to work is to buy 5x100 to 5x120 wheel adapters. You can find them on eBay for about 30 bucks a wheel
The 2006 BMW 325i will cost way more to maintain if you have to repair anything. The 2006 model had problems with the software for the computer which will cost around $100 to repair. Also failure of the crankcase ventilation system which will cost around $300 to repair. The rear window lifter can also fail which will cost around $200 to repair. The 2007 Nissan Altima has no real problems. I would buy the 2007 Nissan Altima.
Saturns use standard fuses. You should be able to buy them anywhere.
At a BMW Dealership or online is probably the easiest.
Your fuse is probably blown. Go buy a pack of new fuses for like $5 dollars.
You can buy a turbo for a 2008 328 i BMW from any automobile store near your location.
You can buy exterior BMW car parts at many different retailers such as Toy Town Germany and BMW Parts Giant can all ship exterior BMW parts to Berlin.
ebay.com