Following the bolt pattern when replacing a car wheel is important because pattern on the car does not match the bolt pattern on the replacement wheel, the wheel can't be mounted properly. In most cases, it can't be mounted at all.
The lug nut bolt pattern typically consists of either four, five, six or eight holes. Most vehicle manufacturers use specific patterns for certain models. In addition to matching the bolt pattern, users must also correctly measure the distance between the holes to get the most accurate fit. The bolt pattern on the car and wheel must match to function properly