No reason to upgrade to a newer year.

Only valid reason to change (IMO)....
lower mileage
different color combo
better maint history
pricing advantage

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2002 X5 4.6is - Titanium Silver / Black Alcantara - Dinan Stage 2 - Bilstein/Eibach - Brembo BBK ----SOLD---
1993 318i - Brilliantrot / Tan - bone stock daily driver