"Bonus Bolt"????? SSM 44253 - 2013 C-MAX / 2013-2014 Fusion and MKZ Hybrid/Energi - Powertrain Clunk/Whine - Bonus Bolt In Engine Mount Some 2013 C-MAX and 2013-2014 Fusion and MKZ Hybrid/Energi vehicles may exhibit a tactile vibration or clunking/thumping noise when braking or when tipping in or out of the throttle, or a powertrain/transaxle whine primarily when braking. This may be caused by a foreign object such as a nut or bolt lodged in one of the powertrain mounts causing a ground out condition to the body - either the RH engine mount or the LH transmission mount. To access the LH engine transmission mount, remove the 7B012 Secondary On Board Diagnostic Module (SOBDMC) and the upper half of the mount in order to inspect for this foreign object and possible grounding condition.