Need more info. Color combos? Does either have maintenance history? Lower mileage is usually better, but in some cases it could mean it was in the shop more, therefore driven less. Plus 70Kmi is still good (not like 50K vs 100K).

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2005 BMW X5 4.4 Sport Upgrades:

Dinan Cold Air Intake
Dinan Stage II Software
Akebono Euro Cermaic Pads
Brembo Rotors
Titan Silver Metal Gauge Rings
DICE IPOD Module
Hardwired Passport 9500ix Radar/Laser Detector