I see the question about the belts on line as they show two application solutions
ECS shows
Mfg Part#11287507626
ECS Part# ES#263659
Brand continental

FCP euro shows both
2003 BMW X5
Position: Air Conditioning, BANDO
OE Numbers: 5K1030, 5PK1030, 12634319, 93182249
FCP ID: 53967

2003 BMW X5
Position: Air Conditioning
OE Numbers: 5K1023, 5PK1023, 11287507626, 12634321, 55555404
FCP ID: 94831

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2005 X5 4.8IS
The Blue ones are always FASTER....

Current Garage:
2005 X5 4.8is
2002 M5 TiSilver
2003 525iT
1998 528i
Former Garage Stable Highlights
2004 325XiT Sport
1973 De Tomaso Pantera, L Model
1970 Dodge Challenger T/A 4 sp Alpine White
1970 Dodge Challenger T/A 4 sp GoManGo Green
1971 Dart Sport, “Dart Light” package
1969 Road Runner 383
1968 Ply Barracuda 340S FB Sea-foam Green