When I changed mine, the lower bolt was not, i repeat not, frozen or rusted in place. When the nut was put on at the factory, it was tightened with enough force to cause the surrounding metal to pinch in on the threads. No amount of banging with the BFH would move the bolt. Removing the flag off the bolt head, and backing it out with an 18mm socket did the trick. Once that was figured out, the passenger side took 5-10 minutes to remove.