2019 Ford Flex maintenance schedule

The 2019 Flex is part of the D4 generation (2014-2019), sold as a wagon. Below: its service intervals with the source behind each one, the fluids it takes, the problems owners report for this year, and the NHTSA recalls issued for it.

Service schedule

What the 2019 Flex needs, and when

All 12 of these items come from Ford's own published schedule. Manufacturer rows link to Ford's own schedule, Independent rows to a service shop or parts retailer's published guide.

ServiceIntervalSource
Engine oil and filter

Severe duty: 5000

7,500 mi / 6 monthsManufacturer
Engine air filterInspect, replace as neededManufacturer
Cabin air filter20,000 miManufacturer
Tire rotation7,500 mi / 6 monthsManufacturer
Brake fluid3 yearsManufacturer
Engine coolant

Internal water pump watch

100,000 mi / 6 yearsManufacturer
Transmission fluid

PTU fluid 30k recommended

150,000 miManufacturer
Spark plugs

EcoBoost: 60000

100,000 miManufacturer
Serpentine beltInspect, replace as neededManufacturer
Differential and transfer case fluid (AWD)

PTU catastrophic failure risk

150,000 miManufacturer
PCV valve100,000 miManufacturer
12V batteryInspect, replace as neededManufacturer

Intervals are for normal driving; towing, short trips, extreme heat or dust shorten them. Services we could not find an interval for are left off rather than guessed.

Fluids and engines

What goes in it

Engine oil
5W-20 / 5W-30, 6 qt
Coolant
Motorcraft Orange
Transmission fluid
MERCON LV

Powertrains in this generation

  • 3.5L 6-cyl (Duratec), 287 hp, 6AT, FWD/AWD
  • 3.5L 6-cyl (EcoBoost), 365 hp, 6AT, AWD

Confirm the exact spec against the owner's manual or the label under the hood; capacities vary by engine and drivetrain.

Known problems

What 2019 Flex owners run into

Problems reported for this model year, with the mileage they tend to show up at. Buying past a window is not automatically a pass - it just needs to be priced in.

Internal water pump

high severity

80,000-120,000 mi · $1,500-$2,500 to fix

Coolant mixed in oil

Source: repairpal.com

PTU Failure

high severity

From about 60,000 mi · $1,200-$2,000 to fix

Odor / AWD failure

Source: repairpal.com

Safety recalls

4 NHTSA recalls for the 2019 Ford Flex

From NHTSA's recall database, matched by model and year. Recall repairs are free at Ford dealers, and a given car may already be fixed or fall outside a campaign, so check the VIN at nhtsa.gov/recalls before you buy.

October 2025

Ford Motor Company (Ford) is recalling certain 2017-2019 Flex vehicles. The driver and front passenger B-Pillar door trim may detach while driving.

Remedy: Dealers will repair or replace the B-pillar trim as necessary, free of charge. Interim letters, notifying owners of the safety risk, were mailed December 17, 2025. Additional letters will be sent once the remedy is available, anticipated March 2027. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 25SB8. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on October 28, 2025.

Back over prevention

NHTSA 25V695000

October 2025

Ford Motor Company (Ford) is recalling certain 2015-2019 Flex, 2015 Explorer, Lincoln MKT, Lincoln MKZ, 2015-2016 C-Max, Escape, Taurus, 2016 Fusion, 2018-2019 Taurus, 2019 Lincoln MKT, Fiesta, and 2020 Mustang vehicles. The rearview camera may display a distorted, intermittent, or blank image when the vehicle is in reverse.

Remedy: Dealers will inspect and replace the rearview camera as necessary, free of charge. This will be a phased campaign, with the remedy becoming available in different phases based on model and model years. Interim letters notifying owners of the safety risk were mailed on October 25, 2025. Additional letters will be mailed once the final remedy is available on each phase. Mustang owner notification letters were mailed January 2, 2026. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 25SA9. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on October 14, 2025.

Back over prevention

NHTSA 24V951000

December 2024

Ford Motor Company (Ford) is recalling certain 2019 Flex, Fiesta, and Lincoln MKT vehicles. The rearview camera may intermittently display a blank or distorted image.

Remedy: Dealers will replace the rearview camera as necessary, free of charge. Interim letters, notifying owners of the safety risk, were mailed January 22, 2025. A second notice will be sent once the final remedy is available, anticipated March 2027. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 24S75.

Electrical system

NHTSA 18V548000

August 2018

Ford Motor Company (Ford) is recalling certain 2018 Ford Edge, Lincoln MKX, 2019 Ford Flex, and Lincoln MKT vehicles. The power supply cables at the starter and the alternator may not have been properly secured, possibly resulting in an electrical arc.

Remedy: Ford will notify owners, and dealers will inspect the alternator and starter motor power supply cables to verify that they are properly secured, correcting them as necessary, free of charge. The recall began September 26, 2018. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 18S25.

Other Flex model years

D4 (2014-2019)

Shopping new? The Ford Flex guide covers the current model, with what it costs to keep for 1 to 15 years.

Sources

Researched 2026-09-18. Modeling, not mechanic advice - always confirm against your car's owner's manual and service records.

Running a Flex for income?

Carlyle scores the exact listing on cost per remaining mile and projected Turo income, so you know what a 2019 Flex earns before you buy it.

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