[BRGT350]

Sounds like the dealer is confusing the early production Focus ST issue with the Fiesta. I have no such noises and have not heard of any from the other ST agents with cars. We run these things very hard and don't run into the noises you are talking about. The only noises under hard acceleration come from wheel hop, which is limited to wet or damp conditions. Under maximum acceleration in the dry and hard shifts into 2nd, there isn't any problems that I have found. I am highly doubting the dealership's explanation on the noise. Not saying yours doesn't have a motor mount issue, but I am pretty sure it isn't related to the Focus ST issue, which was only early production cars.

As for manual gearboxes making noises, that doesn't sound normal to me. With spirial cut gears, they are not loud at all.

 

[BRGT350]

It surely sounds isolated to me. I think Brandon and I have put around 15,000 (he has the car this month, so I am not sure the exact number) miles on the ST since June. Most of those have been hard miles, autocrossing, open track, off road, and general hooning. We do get a laughing sound under hard acceleration and braking, but that is from the driver. The passenger gives a different noise, it varies from laughing to angry requests to stop hooning.

Good luck and keep us posted on the solution.