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The BMW X3 requires an M14 X1.25 hex size lug nut socket, with a 17mm hex size and 1.5" overall length, and a bolt pattern of 5 X112mm. It's essential to have this information when buying new rims to ensure a perfect match. The "5" denotes the number of lug nuts on the wheel, while "112mm" is the bolt pattern diameter that secures the lug studs and prevents unnecessary stress on the wheel assembly. Proper torque of 100 ft.-lbs. should be applied to the lug nuts to prevent bolt stripping or lug stud breakage. Depending on the brand and aftermarket, a set of lug nuts can range from $5 to $15.
The 2019 BMW X3 is equipped with lug nuts that are 17 millimeters in size.