NHTSA Complaint #11518617 — 2017 MAZDA CX-5

While driving on the interstate (continuously for about 4 hours) the vehicle suddenly lost power and the engine stalled. Power steering and power brakes were impacted and the vehicle was difficult to get off the road safely. Once stopped, it would not restart over a 30 minute period. A tow truck was called and it was taken to the dealer. A couple hours later when the dealer checked it, the vehicle started normally and drove without issue. A P0192 code was stored in the ECU so the high pressure fuel pump was replaced even though they could not reproduce the problem. The vehicle has 63000 miles on it now, but a similar sequence happened at 15000 miles. In that situation while driving at a steady speed all power cut out and the engine abruptly downshifted to the point where the tires squealed. After pulling off the road and stopping/starting the vehicle it seemed to drive normally again. We were traveling at the time with no dealer nearby, but when we returned back home we took it to the dealer and they found the same code P0192 and ran various tests and decided to replace the high pressure fuel pump even though it was driving properly. In only 63000 miles this vehicle has twice failed dramatically and without warning in ways that could easily cause an accident or injury. I am lacking in confidence that the root cause has ever been identified.