I supplied automatic Halon fire suppression systems as part of supply contracts for electrical power generation plants in the late eighties and early nineties. It wasn't our core business, we used contractors for that portion. Halon became illegal around that time. While there are ways to use existing Halon, and there are Halon substitutes, I would stay away from them myself. Yes, a chemical extinguisher can damage a vehicle. So can fire. The usual goal is to get the occupants out IMO, not to minimize damage to the vehicle. It will often be a write off in any case. And who wants to run up to a burning vehicle with only a 2 lb extinguisher in hand?

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue