Purchased this car used in July 2012. Is a 2010 and had low miles on it. Dealer claimed vehicle was a lease and was turned in. After driving the car several days, it stalled at stop sign, no engine light appeared. After re-starting, it drove fine. Several weeks later, vehicle again stalled at stop sign. No engine light. Vehicle was brought to dealer where the throttle body was replaced. Several days later, vehicle again stalled at stop light. This has been going on for over 9 months. It may not stall for several weeks. Dealer kept the car for one week, with a mechanic driving it as it was hooked up to portable diagnostic machine. It never stalled, nor did it show any engine lights. Dealer claims they cannot fix it if they do not see any indicators on diagnostic machine. It is no longer under warranty and if I want to continue to pursue this, I have to pay for each trip. Certainly, someone must have an idea of what is causing this as this seems to be a safety issue. I am expecting to be rear-ended any time now.

- Lyman, ME, USA

Stalled three times, without warning, while traveling at 50 mph. Almost rear ended each time. Vehicle 38 month old and less then 34,000 miles. Replace throttle body. Please have Ford check into this before someone gets hurt.

- Dearborn, MI, USA

2010 Mercury Milan engine suddenly died on an urban interstate with similar symptoms of running out of fuel, and has died multiple times since. Wrench light illuminated as engine died, but no check engine light or codes appear for diagnosis. Must shut off engine, then able to restart engine. Engine dies randomly and is not affected by moisture, temp, or time driven. Condition is hazardous anytime acceleration and control are critical. Website entries indicate this is a widespread problem. Took into Ford dealer once for diagnosis and dealer replaced air filter, did not fix problem. Throttle body suspected culprit, but no diagnostic codes appear.

- Hales Corners, WI, USA

Qua daughter driving back and forth to work, vehicle sputters and loses all speed no throttle response. Has to pull over and restart engine then proceed with caution. Unit cuts off every 15 to 20 miles. Ford mechanic says its the throttle body assembly of course it's not under warranty.

- Aiken, SC, USA

I was entering the interstate at 60 mph when my car jerked, and lost response of the acceleration. The throttle control/transmission and check engine light came on, so I restarted the car and only the check engine light remained. I was able to exit the interstate and took my car to a auto store to run a check, was told the throttle actuator control system was at fault. Noticed that this is a problem that many owners of this year make and model have. Hopefully Mercury will recall this part.

- Decatur, GA, USA

Started vehicle and noticed car jerking and not accelerating correctly. I was stopped at light approx 1/3 mile from start and car died at light, car restarted and made left turn onto busy freeway and car heisitated and stated jerking again with no acceleration. Moved to shoulder of road and called aaa to have car towed....unsafe and unable to continue drive home...15 miles ahead. Ford service pulled code P2111 from dashboard lights and said throttle body was shot...at 38000 miles. No recourse from Ford out of warranty 2000 miles. I was charged $198.55 labor and $137.80 parts...total with tax $347.96. They replaced part with a new part number...obviously they know this is a defective part....no customer compensation.

- Florissant, MO, USA

Driving car slows and jerks press gas nothing happens. Pull over car jerks I cut it off and restart the engine. Works fine for a few moments then starts again. Repeated this process 6 times. Made it to the Ford dealer they replaced a throttle sensor. Worked fine after that. Then I traded it.

- Fletcher, NC, USA