"How reliable is the 2018 Ford Flex?"

"Based on 60 NHTSA complaints, the 2018 Ford Flex has a median complaint mileage of 51497 miles. The most common issue is UNKNOWN OR OTHER."

"What are common problems with the 2018 Ford Flex?"

"The most frequently reported component in NHTSA complaints for the 2018 Ford Flex is UNKNOWN OR OTHER, accounting for a significant portion of the 60 total complaints filed."

2018 Ford Flex: Reliability Data

Source: NHTSA — 60 complaints

Total Complaints

51,497mi

Median Mileage

UNKNOWN OR OTHER

Top Issue

Crash Reports

When Do Complaints Happen?

Distribution of NHTSA complaints by vehicle mileage at time of report.

31,299 25th Percentile

51,497 Median Mileage

69,500 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

UNKNOWN OR OTHER

ELECTRICAL SYSTEM

SUSPENSION

STRUCTURE:BODY

BACK OVER PREVENTION

STRUCTURE

FUEL/PROPULSION SYSTEM

POWER TRAIN

AIR BAGS

WHEELS

Severity Assessment

Crashes

Fires

Injuries

Deaths

Sample Complaint Reports

"BRAND NEW CAR 30 DAYS OLD. CAME HOME AND PARKED IN OUR FLAT DRIVEWAY AND PUT SHIFTER IN PARK. TURNED ENGINE OFF AND OPENED CAR DOOR TO GET OUT AND CAR BEGAN TO ROLL BACKWARDS TOWARD THE STREET. HAD TO JUMP IN BEFORE I OR OTHER PEOPLE GOT RUN OVER. PUT FOOT ON BRAKE. SHIFTER CLEARLY IN PARK. CAR ENGI..."

"ENGINE STOPPED WHILE DRIVING IN WALMART PARKING LOOT. WOULD NOT START. TOWED TO GARAGE WHO TRACED THE CAUSE TO. FUEL PUMP CONTROL MODULE. THERE IS AN EXISTING RECAL FOR THIS PROBLEM FROM 2013 TO 2014 FORD FLEX HOWEVER MY VIN SHOWS AS NOT COVERED. WHATEVER CRITERIA TO LIMIT RECALL APPEARS TO BE ..."

"I HAVE A 2018 FORD FLEX WITH 900 MILES ON IT . I TOOK MY FIRST ROAD TRIP IN 8-4-2018 AND WHILE ACCELERATING HARD TO GET ONTO THE INTERSTATE I NOTICED EXHAUST FUMES WERE COMING INTO THE CABIN AT AN ALARMING RATE , I HAD TO SLOW DOWN AND ROLL THE WINDOWS DOWN IT GOT SO BAD,MY EYES WERE BURNING ,FELT S..."

Source: NHTSA ODI Complaints Database. Names and identifying details omitted.

Data source: View this vehicle on NHTSA.gov | NHTSA ODI Complaints Database. Public domain.

Methodology: Complaint counts and mileage distributions are computed directly from consumer-reported NHTSA complaints. This data represents reported issues, not failure rates — vehicles without complaints are not represented. Full methodology.

Data through: 2026-03-28