I had my SRT for about 2k miles and my left mount broke. I don't know if it motor mounts are a weak spot or not. I replaced both mounts with ones I purchased on line. They were a lot cheaper ($115.69+shipping for both)than most of the other mounts I looked at, but were German made. Just had my mechanic put them on for $50.00. After I had already put them on, some people said that the ones I put on were not very well made in their opinion. I have had them for about 1.5 years and 6K miles and no problems. I drive on roads that are very twisty here in E. Tennessee, but not very many pot holes, etc. I drive quickly, but I am not hard on the car. This is the E-bay store I bought them at: STEERING SUSPENSION, BMW items in Deutsche Parts USA store on eBay! I never have had to replace the transmission mount. So far...... Good luck w/you SRT! I love mine!