Originally Posted by StephenVA

I see a totally different set of part numbers when I search the OE number for a 4.6is application.
water pump is 11287636369 (old number is 11287519955)
AC is 11287636374 old number is 11287507626

At ECS Mfg Part#11287519955 (old number replaced by 11287636369)
ECS Part# ES#2093813
Brand continental $26

GOODYEAR Part # 4070640 More Info Gatorback; Poly-V; 7 Ribs / Effective Length 64" / Outside Length 64.75"
Alternator, Water Pump and Power Steering; Poly-V
$17.98
Fcp
2002 BMW X5
Drive Belt-Primary
OE Numbers: 7K1623, 11287519955 $18.99
FCP ID: 239411