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2009 Ford Flex Recalls, Problems & Maintenance

The 2009 Ford Flex has no open NHTSA recalls. Owners report 6 recurring issue clusters, led by “Transmission and PTU jerking, slipping, or lockup.” Ford uses the Intelligent Oil-Life Monitor (IOLM) to determine when oil changes are due based on actual driving load — not just mileage. Ford's published cap is 10,000 miles or 1 year, whichever comes first. The schedule below reflects Ford's Normal service intervals; F-Series trucks and Super Duty have additional towing-specific items.

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No open recalls on file. NHTSA lists no unrepaired safety recalls for this year, make and model. A recall can be issued at any time, and a specific car can still have one open — check yours by VIN at nhtsa.gov/recalls.

Known issues & problems for this vehicle

What drivers and federal regulators have officially reported about the 2009 Ford Flex.

Reported to NHTSA

Transmission and PTU jerking, slipping, or lockup

POWER TRAIN

15 NHTSA complaints · 2010-03 → 2019-02

“2009 FORD FLEX TRANSMISSION SLIPPING ALMOST CAUSING ACCIDENT”
— Owner report, NHTSA ODI #10404444
“THE POWER TRANSFER UNIT (PTU) FAILS ON A NUMBER OF FORD MODELS. THE SEAL LEAKS AND IN MY CASE THE UNIT NEEDED TO BE REPLACE BECAUSE OF METAL SHAVINGS. THE COST FOR REPAIRS $2,600”
— Owner report, NHTSA ODI #10895328
“AS I AM DRIVING COME TO A STOP. PROCEED IN MOTION MAKING A LEFT TURN OR RIGHT TURN VEHICLE WILL LOCK UP SLOWING DOWN WITH GRINDING. NOW THIS HAS HAPPENED 3 TIMES ON THE ROAD CAUSING TRAFFIC TO STOP”
— Owner report, NHTSA ODI #11181580

Read all complaints on NHTSA →

Dash gauge and door-ajar sensor electrical faults

ELECTRICAL SYSTEM

7 NHTSA complaints · 2010-10 → 2025-12

“PASSENGER DOOR AJAR DASH LIGHT GOES ON AND OFF WHEN THE DOOR IS SECURE AND LOCKED. INTERIOR LIGHTS GO ON AND OFF WHEN AJAR LIGHT IS DISPLAYED AND POWER LOCKS UNLOCK/LOCK AT THE SAME TIME”
— Owner report, NHTSA ODI #11173184
“The door ajar sensor malfunctions and is crazy expensive to fix. There are numerous posts and videos online of workarounds bcz it’s so common but they don’t seem safe since that’s a safety feature and the workarounds are simply a way to trick or bypass the warning sensors”
— Owner report, NHTSA ODI #11524140
“You can be driving down the road, and all your gauges will stop working, and all the warning lights on the dash will light up. The first time this happened my wife got stuck at a gas station all the warning lights were on and the car would not start”
— Owner report, NHTSA ODI #11704068

Read all complaints on NHTSA →

Sudden engine stall or loss of power while driving

ENGINE

32 NHTSA complaints · 2009-04 → 2021-05

“TL*THE CONTACT OWNS A 2009 FORD FLEX. WHILE MAKING A RIGHT TURN IN AN INTERSECTION THE VEHICLE UNEXPECTEDLY STALLED AND THE ENGINE SHUT OFF. THE DRIVER WAS ABLE TO RESTART THE VEHICLE; HOWEVER, SURPRISED THAT A NEW VEHICLE EXPERIENCED A FAILURE”
— Owner report, NHTSA ODI #10266603
“ENGINE STALL AT SPEED. MERGING ON TO FREEWAY AT 50+ MPH, ENGINE CUT OFF, NO POWER. ASSIST BRAKES AND STEERING DISABLED. SAFETY ISSUE. WAS NOT ABLE TO RESTART VEHICLE IMMEDIATELY. WAITED 10 MINUTES AND CAR WAS ABLE TO RESTART. CAR WAS TOWED TO DEALERSHIP FOR DIAGNOSIS”
— Owner report, NHTSA ODI #10373564
“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”
— Owner report, NHTSA ODI #11417809

Read all complaints on NHTSA →

Power steering loss or seizure while driving

STEERING

8 NHTSA complaints · 2013-06 → 2023-04

“EXPERIENCED A TOTAL LOSS OF POWER STEERING. NO CODES/WARNING LIGHTS WERE SHOWN. POWER STEERING FLUID WAS FILLED PROPERLY, AND THERE WERE NO LEAKS FOUND. THANKFULLY THIS DIDN'T OCCUR AT A HIGHER SPEED AS THIS IS A TERRIFYING SAFETY CONCERN”
— Owner report, NHTSA ODI #10715733
“THIS IS THE THIRD TIME THE POWER STEERING HAS FAILED IN THIS VEHICLE. I WAS DRIVING 60 MPH AND WITHOUT WARNING THE STEERING SEIZED. LUCKILY I WAS DRIVING IN RIGHT LANE AND WAS ABLE TO GET VEHICLE SAFELY TO A LOT”
— Owner report, NHTSA ODI #11328645
“STEERING: I HAVE HAD ISSUES WITH MY STEERING, WE HAVE HAD THE RACK AND PINION REPLACED, STEERING PUMP AND STEERING BELT. MY PROBLEM IS STILL NOT FIXED. THE STEERING IS REALLY HARD AND THEN LIKES TO BREAK LOOSE AT ANY GIVEN MOMENT”
— Owner report, NHTSA ODI #11202640

Read all complaints on NHTSA →

Brake pedal travel, seizure, or premature rear brake wear

SERVICE BRAKES, HYDRAULIC

18 NHTSA complaints · 2009-09 → 2018-07

“TL* THE CONTACT OWNS A 2009 FORD FLEX. THE CONTACT STATED THAT WHILE DRIVING 15 MPH, THE BRAKES SEIZED. THE VEHICLE WAS TOWED TO AN AUTHORIZED DEALER AND THE CONTACT WAS INFORMED THAT THE BRAKES WERE DEFECTIVE. THE BRAKES WERE REPLACED”
— Owner report, NHTSA ODI #10441660
“TL* THE CONTACT OWNS A 2009 FORD FLEX. THE CONTACT STATED THAT WHEN THE BRAKE PEDAL WAS DEPRESSED, THE PEDAL TRAVELED TO THE FLOORBOARD NUMEROUS TIMES. THE DEALER (GANLEY FORD WEST, 16100 LORAIN”
— Owner report, NHTSA ODI #11089873
“EXITING HWY AT 50 MPH, HIT BRAKE. HARD BRAKE PEDAL-NO BRAKES FOLLOWED BY ENGINE FULL THROTTLE ACCELERATION-VEHICLE WAS SENT TO THE FORD DEALER IN OCT FOR A CHECK ENG LIGHT THAT COULDN'T BE EXTINGUISHED”
— Owner report, NHTSA ODI #11114580

Read all complaints on NHTSA →

Fuel gauge sudden drop to empty at quarter tank

FUEL/PROPULSION SYSTEM

10 NHTSA complaints · 2015-01 → 2019-03

“GAS GAUGE WILL READ BETWEEN 14 TO 1/2 TANK OF FUEL THEN WITHOUT WARNING DROPS TO E AND CAR DIES. FAULTY FUEL SENSOR OR PUMP DUE TO SADDLEBAG TANK DESIGN. ALSO NO CUTOUT IN FLOORBOARD TO ACCESS THE SECONDARY SENSOR OR PUMP”
— Owner report, NHTSA ODI #10694153
“FUEL GAUGE READING DROPS SUDDENLY FROM 1/4 TANK TO EMPTY IN A MATTER OF SECONDS, NOT ALLOWING TIME TO GET OUT OF TRAFFIC. HAPPENED NUMEROUS TIMES BUT SO FAR ONLY WHEN THE VEHICLE HAS BEEN IN A POSITION TO PULL OFF THE ROAD”
— Owner report, NHTSA ODI #11183876

Read all complaints on NHTSA →

Issues on other model years

Source: NHTSA Office of Defects Investigation (ODI). Complaint data refreshed Sep 20, 2026. Investigation data refreshed Sep 20, 2026.

We display NHTSA's record with attribution; we don't editorialize on what these complaints mean for any specific vehicle.

Raw data + downloads for this vehicle →

Essential maintenance

Critical for safety and preventing major damage

Engine Oil & Filter

Every 7,500 mi

Replace synthetic-blend or full-synthetic Motorcraft oil per the IOLM, or every 7,500-10,000 miles. EcoBoost engines require full synthetic; Coyote 5.0L V8 specifies SAE 5W-30.

Estimated cost — typical U.S. ranges

Dealer

~$120–$160

Shop

~$85–$115

DIY

~$25–$55

Full synthetic costs more than conventional. 5-quart 0W-20 + filter is the typical bill.

Tire Rotation

Every 10,000 mi

Rotate tires every 10,000 miles, or with every other oil change. F-150 4x4 owners should rotate every 5,000-7,500 miles to even out drivetrain bias wear.

Estimated cost — typical U.S. ranges

Dealer

~$85

Shop

~$60

DIY

Free

Often free at the shop where you bought the tires — worth asking before paying.

Brake Inspection

Every 10,000 mi

Inspect brake pads, rotors, and brake fluid level every 10,000 miles. Front pads on F-150 and Explorer typically last 40,000-60,000 miles.

Estimated cost — typical U.S. ranges

Dealer

~$85

Shop

~$60

DIY

Free

Most shops do this free as a courtesy with any service. Don't pay separately if you can avoid it.

Brake Fluid

Every 45,000 mi

Ford specifies brake fluid replacement on an inspection basis, but moisture testing every 3 years is recommended. Replace if reading exceeds 3% water content.

Estimated cost — typical U.S. ranges

Dealer

~$180–$200

Shop

~$125–$140

DIY

~$10–$25

DOT 3 or 4 — match the cap. Vacuum bleeders make this a one-person DIY.

Important maintenance

Keeps your vehicle running smoothly and efficiently

Engine Air Filter

Every 30,000 mi

Replace the engine air filter every 30,000 miles. EcoBoost turbocharged engines are sensitive to airflow restriction — don't extend.

Estimated cost — typical U.S. ranges

Dealer

~$60–$95

Shop

~$45–$70

DIY

~$15–$40

5-minute job on most cars; the airbox lid usually has clips, no tools needed.

Automatic Transmission Fluid

Every 150,000 mi

Ford 6R80, 10R80, and 8F transmissions use Mercon LV fluid rated 150,000 miles under normal service. Severe service (towing, plowing) drops this to 60,000 miles.

Estimated cost — typical U.S. ranges

Dealer

~$330–$500

Shop

~$235–$355

DIY

~$60–$180

Some sealed transmissions have no dipstick — fill is precise and best left to a shop. Many drivers can still DIY drain-and-fill.

Transfer Case Fluid (4WD models)

Every 60,000 mi

On 4x4 models, replace transfer case fluid every 60,000 miles. Use Motorcraft XL-12 — do not substitute generic transfer case fluid.

Estimated cost — typical U.S. ranges

Dealer

~$105–$140

Shop

~$75–$100

DIY

~$15–$40

AWD/4WD vehicles only. Easy drain-and-fill on most platforms.

Rear Differential Fluid

Every 100,000 mi

F-Series and Expedition: replace rear axle fluid every 100,000 miles, or 50,000 miles if towing. Limited-slip rear ends require friction-modifier additive.

Estimated cost — typical U.S. ranges

Dealer

~$150–$195

Shop

~$105–$135

DIY

~$20–$50

Drain plug + fill plug — straightforward DIY. AWD vehicles have two; budget for both.

Spark Plugs

Every 100,000 mi

Iridium spark plugs on Coyote 5.0L, EcoBoost 2.7L/3.5L, and 2.3L are rated 100,000 miles. EcoBoost engines: never exceed the interval — gap erosion causes coil failure.

Estimated cost — typical U.S. ranges

Dealer

~$285–$390

Shop

~$200–$275

DIY

~$25–$100

Iridium plugs cost more but last 100k+ miles. V6/V8 access varies wildly — some are tough.

Engine Coolant

Every 50,000 mi

Motorcraft Orange (Dex-Cool compatible) coolant: first change at 100,000 miles, then every 50,000. Older trucks with Yellow Motorcraft coolant: 50,000 miles throughout.

Estimated cost — typical U.S. ranges

Dealer

~$285–$330

Shop

~$200–$235

DIY

~$25–$60

Use the manufacturer-specified coolant — wrong color/chemistry can damage the cooling system.

Recommended maintenance

Extends the life of your vehicle and improves comfort

Cabin Air Filter

Every 20,000 mi

Replace the cabin air filter every 20,000 miles. On F-150, located behind the glove box; on Escape and Explorer, accessed from the passenger footwell.

Estimated cost — typical U.S. ranges

Dealer

~$60–$95

Shop

~$45–$70

DIY

~$15–$40

Usually behind the glovebox. Shops charge labor for a 10-minute job — easy DIY win.

Fatal crash history & reported problems

Occupant deaths in fatal crashes (FARS)

14 crashes 1990–2024

How the 14 occupant deaths break down

11

driver deaths

3

passenger deaths

14

occupant deaths

Crash years covered: 1990–2024 This model year first appears in 2012 crashes. Older models have had more years on the road to appear in these crashes, so a higher count here does not by itself mean a vehicle is less safe.

FARS counts every occupant death in a fatal crash, whatever the cause — it does not mean the vehicle was at fault or defective. Counts are not adjusted for how many of each vehicle are on the road. How to read this number

FARS 2024 data is an annual report file. NHTSA revises these records when the final file is published, so this count can change.

Why we show driver deaths too

Every vehicle has exactly one driver seat, so driver deaths line up fairly when you compare one model to another. Occupant deaths include passengers, so a three row SUV can show a higher number than a two seat car simply because it carries more people.

Both figures are plain counts, not rates. A rate would need to know how many of each vehicle are on the road, and that registration data is not public, so we do not publish rates or scores of any kind.

IIHS publishes driver death rates using this same driver only idea, paired with a registered vehicle years denominator we do not have. Their rates and these counts answer different questions, so do not read either number here as a safety rating.

Owner-reported problem signals

Separate from the federal fatality data above: complaints owners filed with NHTSA about this year and model. These are reports of problems, unverified, and are counted here only as signals.

7

complaints mentioning a crash

2

complaints mentioning a fire

Reviewed known issues for this vehicle

Typical U.S. ranges. Actual quotes vary by shop, parts choice, and vehicle condition.

How we estimate: Dealer = OEM parts × 1.4 + labor × $165/hr. Shop = parts + labor × $115/hr. DIY = parts only.

This maintenance schedule for the 2009 Ford Flex reflects Ford's published service intervals and the Intelligent Oil-Life Monitor system. Your actual service needs may vary based on driving conditions, climate, and vehicle usage. Always consult your owner's manual for model-specific recommendations.

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