One problem related to engine noise has been reported for the 2011 Mercury Milan. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2011 Mercury Milan based on all problems reported for the 2011 Milan.
Driving on a straight away the vehicle suddenly makes a noise as if it were shifting very hard although it was not. Immediately lost acceleration and dashboard light illuminates. Pulled vehicle to the side of the road and rpm needle bounced as car lunged but would not accelerate. Called for roadside assistance and my dealer's service department who knew based on my description a possible cause. Vehicle towed to dealer, diagnostics proved throttle body needed to be replaced. Repair made. Research proved that this is a known problem but no recall has been made. It was a very foggy morning and several multi car accidents had been reported. Had I been on busier stretch of road at the time of the break down I could have easily been killed with slowing down suddenly and without any evident cause. A recall should be issued and refunds made to those who have already experienced this failure.