Using these Kein engine mounts is straightforward. First, make sure your car is parked on a flat and stable surface. Then, carefully remove the old engine mounts using the appropriate tools. Install the new Kein engine mounts in the same position as the old ones and tighten the bolts securely. As for maintenance, it's a good idea to check the bolts every few months to ensure they haven't loosened. If you notice any unusual noises or vibrations, it might be a sign that you need to check the mounts. And don't forget, these mounts come with a 2 - year warranty, so if you have any problems during this period, you can get in touch with the manufacturer.