Audi-Porsche-VW-03-7SEU16C-PV7

DENSO is one of the world's leading suppliers of A/C compressors for automotive applications.

http://www.compressor-express.com/ac-compressor/vw/Audi-Porsche-VW-03-7SEU16C-PV7

Some Volkswagen Passat, Phaeton,Touareg are built with the same air conditioning compressor. The Original Equipment Manufacturer Numbers (OEM numbers) are VW 3B0820803A, 3B0820803B, 3B0820803C, 3D0820803M, 3D0820803R, 7L6820803D, 7L6820803G, 7L6820803L, 7L6820803P, 7L6820803S.

http://www.youtube.com/watch?feature=player_embedded&v=jmSGGnubIZY

The air-conditioning system of these vehicles was assembled with a Denso 7SEU16C / 7SEU17C compressor. Manufacturer numbers: Denso 447150-3630, 447170-8680, 447170-8685, 447170-8686, 447170-8687, 447170-8688, 447180-8600, 447190-4350, 447190-4353, 447190-7590, 447190-7596.

These ac units seem to be interchangeable.