Problems · by component
2009 Ford Flex engine problems
36 owner complaints to NHTSA about the 2009 Ford Flex cite engine, 20% of all 181 complaints for this model year.
Complaints
36
20% of all complaints
Crashes
0
Reported by owners
Fires
1
Reported by owners
Injuries
0
Reported by owners
What owners say about the engine
Verbatim from NHTSA complaints, newest first
“About 5 miles from home with no warning.The car went from regular temp to hot then stopped.Water mixed with the oil.The tech said the water pump just failed.I did not have any problems with it running hot or anything.”
“My Flex has repeatedly lost power while driving. I can feel the car lose power, and the yellow wrench light comes on. After reading up on it, I learned that you have to turn the vehicle off, wherever you are, and restart it after a few minutes. The wrench light turns off, and the car runs as normal, with no records of codes. This is talked about over and over in online forums. The safety issue is that it has happened on the freeway several times while traveling at a high rate of speed. The car loses power, and you cannot accelerate. You have to find a way to stop immediately, put the car in park (and listen to the transmission clunk) and turn it off. This last instance put me in harms way on the freeway. The car lost power while traveling 70mph. I immediately lost speed and had to cross 3 lanes of traffic to pull over to turn the car off. All of the forums talk about the throttle body, but everyone says that’s not the issue. The OSS and TSS sensors are also discussed. The dealerships cannot find out what’s wrong because once the car is turned off and restarted, any codes are erased. The issue persists, and the car keeps losing power wherever and whenever. I am…”
“LAST NIGHT, I WENT TO BACK THE CAR OUT OF THE GARAGE AND WHILE IN REVERSE, THE ENGINE STARTED REVVING UP UNCONTROLLABLY AND EVEN THOUGH I HAD MY FOOT ON THE BRAKES, IT KEPT MOVING IN REVERSE. I QUICKLY PUT IT IN NEUTRAL AND THE REVVING CAME DOWN. SHUT DOWN THE CAR, RESTARTED IT AND THIS TIME, I PUT IT IN DRIVE AND THE SAME THING HAPPEN AGAIN ONLY TO START LUNGING FORWARD EVEN WHILE BRAKING. IF I WERE IN TRAFFIC OR AT A STOP LIGHT OR SIGN, I WOULD HAVE SURELY HIT THE PERSON(S) IN FRONT OR BEHIND ME. LATER MY WIFE EXPLAINED TO ME THIS HAPPENED WHILE DRIVING ON THE INTERSTATE AND SHE HAD A HARD TIME CONTROLLING THE SPEED, DUE TO REVVING, EVEN WHILE USING THE BRAKE. SHE MANAGED TO TAKE AN EXIT RAMP INTO A LARGE PARKING LOT USING EXTREME BRAKING (FORCEFUL) AND SHUT THE CAR OFF. SHE WAS ABLE TO MAKE IT HOME SHORTLY THEREAFTER. I WAITED UNTIL AFTER 8PM TO DRIVE WHEN THERE WAS LITTLE OR NO TRAFFIC TO DRIVE TO THE CLOSEST CAR REPAIR SHOP TO DROP IT OFF AND THERE HAPPENED TO BE A MECHANIC LEAVING AS I WAS PULLING UP. I DESCRIBED THE PROBLEM AND HE MENTIONED THAT IT WAS A DEFINITELY A SAFETY ISSUE AND ADVISED NOT TO DRIVE IT UNTIL IT GOT DIAGNOSED & REPAIRED. I'VE OWNED A…”
“TL* THE CONTACT OWNS A 2009 FORD FLEX. THE CONTACT STATED WHILE HIS WIFE WAS DRIVING 55 MPH, THE VEHICLE SHIFTED INDEPENDENTLY INTO NEUTRAL. THE CONTACT STATED NO WARNING LIGHT WAS ILLUMINATED. THE DRIVER PULLED OVER ON THE SIDE OF THE ROAD. THE VEHICLE WAS RESTARTED AND DRIVEN TO HER DESTINATION. THE VEHICLE WAS TAKEN TO THE LOCAL DEALER SAFFORD FORD LINCOLN OF SALISBURY LOCATED AT 1902 N SALISBURY BLVD, SALISBURY, MD 21801, (443) 210-4835, AND WAS DIAGNOSED. THE CONTACT WAS INFORMED THAT AN UNKNOWN PART NEEDED TO BE REPLACED ALONG WITH A SOFTWARE UPDATE. THE VEHICLE WAS REPAIRED. THE MANUFACTURER HAD BEEN INFORMED OF FAILURE. THE FAILURE MILEAGE WAS UNKNOWN.”
“MY CRADLE IS RUSTED THROUGH ALL THE WAY TO THE LOWER CONTROL ARM AND HAS A VISIBLE CRACK. I'M TOLD THIS IS A SAFETY ISSUE AND CONCERN AS WELL AS A SAFETY HAZARD WHEN ONE CAN BE INJURED DUE TO THE ENGINE FALLING OUT TO NAME ONE. I'M TOLD BY A MECHANIC THIS IS A FACTORY DEFAULT.I AM VERY CONCERNED AND WOULD GREATLY APPRECIATE SOME ASSISTANCE WITH THIS MATTER. SINCERELY, [XXX] 09/05/2020 *TR”
“I WAS DRIVING ABOUT 45 MILE PER HR. THEN MY FORD FLEX STARTED TO STALL SO I HAD IT TOWED TO A NEAR BY REPAIR SHOP , THEY LOOKED OVER MY VEHICLE AND THEY CAME TO THE CONCLUSION, THAT THE WATER PIMP HAD FAILED AND COOLANT ENTERED THE BLOCK, SO THERE FOR THE ENGINE NEEDED TO BE REPLACE. WE ARE NOW IN THE PROCESS OF THE REPAIR INVOICE 369486 02/28/2020”
Showing 6 of 36 reports. Read every report on NHTSA.gov.
Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 7, 2026NHTSA vehicle page
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.