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The 2009 BMW 328i has a wheel bolt pattern of 5 lug, with a 4.72-inch or 120mm medium offset. When working on removing or installing lug nuts on a car, it's important to handle them with care to prevent any damage. Over-tightening the lug nuts can lead to them breaking or becoming stripped, especially if they are old or rusty. Stripped lug nuts will just spin in place and make it difficult to remove them. If this occurs, a mechanical press may be needed to push them out, risking damage to the wheel. If a lug nut snaps, it will require removing the wheel's rotor and unthreading them from the back. To avoid these issues, it's best to exercise caution when dealing with lug nuts.
The wheel bolt pattern for the 2009 BMW 328i is a 5-lug design with a diameter of 4.72 inches or 120mm and a medium offset.