This is my new Alternator. There you can see that is hold in only 2 bolts. One short and one long. When I replace the alternator, the new long bolt was not working. Can not fit the threads. So, we use the original Toyota old long bolt. This alternator is working now in the car. In the summer producing about 13.8 Volts, and in the winter 14.2 Volts. My car voltmeter is checking all the time the battery charge.