This is a great option to get the original throttle actuators replaced before they cause limp mode or leave you stranded. I have yet to put very many miles on mine, but so far they have been working excellent. Sharper throttle response and a slightly smoother-running engine will be noticeable if your old ones are starting to act up, one of mine had a poor return to neutral so I could tell the difference. So far very happy with the performance and great service from Euro Power Motorsports. These are genuine car guys that want to keep our ///M engines running !