NHTSA Complaint #11538439 — 2015 FORD C-MAX

A low rumbling noise seemingly situated at the right front (passenger) tire started with no warning approximately two months prior; no warning lights came on, the car did not change its driving--only a low rumbling noise which increased in revolutions with acceleration and quietened with braking and when in neutral--emerged. I subsequently took the car to a local mechanic to evaluate if the brakes were failing but in his diagnosis, he thought the likely cause to be internal to the transmission--a finding now confirmed by two other mechanics, including the Ford dealership. However, in researching this issue, a Technical Service Bulletin (20-2219) outlining this known issue with the transmission of the 2013-2016 Ford C-max built before August 2015 (mine was built in April 2015) popped up, issued June 2020. My car is now marginally outside of warranty at 112,000 miles but this known issue is one that makes the car a danger to drive-both to myself and other drivers on the road-as no warning has come on, the sound is deceptively benign and yet if the transmission fails while on a highway or other fast-paced motorway, there could be a significant accident that ensues. Given that Ford is aware of this fault in their transmission builds with no prior warning to owners of these cars, this puts road safety of the C-max driver/passengers and others concurrently on the road at significant risk. I am baffled as to why this issue has not been recalled given its severity and the risk of it occurring just outside of warranty when costs to replace the transmission are exorbitant.