1993 Toyota Corolla Motor Mounts

Engine problem
1993 Toyota Corolla 4 cyl Automatic 131000 miles

I had the timing belt replaced and there was a vibration during idle after that. Took it back to see if it was off a tooth and it wasn't, but since one of the mounts had been loosened, was told all three were adjusted. Still had the vibration, so took it back again and was told that the four mounts need to be replaced. When I asked about the number, he said he was wrong, there were four and and gave me an estimate to replace. I decided to get another estimate from my friend's mechanic. I didn't tell him how many mounts, just that I was told had hardened and I needed new mounts. He gave me a great estimate for three mounts. I told him I thought there were four and really didn't get an answer. So, my question is, how many mount does a 93 Corolla actually have? Thanks.