What 937 owners told NHTSA about the 2021 Ford F-150 Supercab

Unknown which component is failing. It started with a rumble while accelerating or coasting but goes away when I shift into neutral so I believe that is the transmission. Other issues that are occurring randomly, speedometer will change indication to slower speed than I am actually going or it will drop to 0 while I am driving. Alerts and faults that have shown at the same time the speedometer goes out are: Powertrain fault, ABS, Forward Collision Warning, Parking Collision Warning, Automatic Emergency Braking, Lane Departure Warning, Blind Spot Warning, Lane Keeping Assistance, Cross Traffic Warning. Also a random metallic spinning noise coming from under the truck. It has been in the dealer garage 5 times now.

NHTSA ODI 11591226

Normal brakes fail. Only the emergency brake functions and locks up one of the rear tires.

NHTSA ODI 11583557

My family and I were driving to a local coffee shop when my dash went off with a low brake fluid warning, I pull over to check and it was bone dry. That pretty odd so I immediately start looking for leaks and discovered the passenger side rear brake line where it connects to the rubber hose and goes to the caliper has a MAJOR leak. I videoed the leak so show how bad it was and where it was leaking from. The rubber hose itself if fine the leak is coming from the metal part of the hose but unfortunately the way to fix the issue is by replacing the hose assembly and according to ford that part is a wearable item, so my extended warranty I paid for it does not cover it. I find it absurd and extremely dangerous that a three-year-old truck has a major brake fluid leak like that and Ford has been no help at all. I’ve spent all day on the phone with them arguing and they don’t seem to care. This is a major safety issue from a clearly faulty part from the manufacturer, and I don’t feel as though I should be responsible with the bill.

NHTSA ODI 11582762

The contact owns a 2021 Ford F-150. The contact stated that the brake power booster was emitting a hissing sound when the brake pedal was being depressed. The contact used an excessive amount of pressure to depress the brake pedal. The ABS warning light was illuminated but deactivated independently. The vehicle was taken to the dealer, but the cause of the failure was not determined. The dealer confirmed that the failure was related to NHTSA Campaign Number: 21V533000 (Service Brakes, Hydraulic) however, the VIN was not included. The vehicle had not been repaired. The manufacturer was made aware of the failure, and it was confirmed that the VIN was not included in the recall. The contact was referred to the NHTSA Hotline to file a complaint. The failure mileage was 28,000.

NHTSA ODI 11581295

While driving forward the parking brake system automatically applied itself. Because of this I was nearly involved in a rear end collision. This was completely unexpected and without warning. The vehicle was in for service last week. It is now back in service and they are having trouble diagnosing the parking brake system. My vehicle is currently at the dealer and the dealer is in contact with Ford because the dealer is having trouble diagnosing the parking brake system.

NHTSA ODI 11570640

On 3 occasions the emergency break applied itself while vehicle still moving and all of them was parking the vehicle but not got to fully stop when e brake applied itself. Also took it to the dealer nut they didn't find anything wrong with the vehicle

NHTSA ODI 11548229

The electric trailer brakes only work intermittently. This results in dangerous situations where they fail without warning. An update was made in 2022 but failed to fix the issue. I have been on forums where many others are still having issues just like mine. It's very dangerous and needs to be addressed.

NHTSA ODI 11544458

The Brake Pedal must be pressed very hard and the Pedal travels further than normal compared to my 2020 F150. The dealer told me the Brakes are OK but I can’t believe that Power Disk brakes don’t stop the vehicle easily. There’s is also extra brake necessary to come to a complete stop !

NHTSA ODI 11539041

The contact owns a 2021 Ford F-150. The contact stated that while driving at an undisclosed speed and depressing the brake pedal, the vehicle lurched and jerked. There was no further information provided. The vehicle was taken to the dealer to be diagnosed. The vehicle was not diagnosed nor repaired. The manufacturer was made aware of the failure, but no assistance was provided. The failure mileage was approximately 50,000.

NHTSA ODI 11536298

The contact owns a 2021 Ford F-150. The contact stated that while driving at an undisclosed speed, the Advancetrac warning light illuminated. The contact stated that the screen was blinking. The vehicle was taken to the local dealer where it was diagnosed that the electronic brake booster needed to be replaced. The vehicle was repaired. The manufacturer was notified of the failure and provided a case number. The failure mileage was approximately 49,276.

NHTSA ODI 11520883

The contact owns a 2021 Ford F-150. The contact stated that while driving at an undisclosed speed, the vehicle shuddered. The contact related the failure to NHTSA Campaign Number: 21V533000 (Service Brakes, Hydraulic). The vehicle was taken to the dealer where it was repaired, however, the VIN was not included in the recall. The manufacturer was made aware of the failure. The failure mileage was approximately 45,000.

NHTSA ODI 11519805

My 2021 F150 XLT with 19,000 miles has never had functioning trailer brakes. Initially I was plagued with constant trailer wiring fault / trailer disconnected issues, and zero slide or pedal brakes, when trying to tow a travel trailer. Two separate dealerships initially dismissed my concerns because it passed their trailer simulator test. Eventually, Ford replaced the trailer wiring harness under warranty. After that, I had intermittent slide brakes that would work, but I never saw any brake output when using the pedal brakes, regardless of gain setting. Ford then replaced the trailer brake controller, which worsened the issue: once again I am getting trailer wiring faults. My slide brakes are extremely hit or miss, and when they do engage they catch and release several times. I still have zero brake output when using the pedal brakes regardless of gain. The dealership consulted a Ford engineer and assured me that my truck is perfect, I should not expect to see brake output for pedal brakes, and all is working as designed. They blamed my trailer. I demanded to test my trailer with a different F150 from the dealership and it works flawlessly - brake output on both slide and pedal brakes, no error codes. It is horrifyingly obvious that I have never had ANY trailer braking functioning with my pedal brakes now that I have compared the braking distance in the loaner truck to my truck. If I had believed Ford, I would be towing a 7,500lb trailer with zero idea that I did not have any trailer brakes. Dealership and corporate are both kicking their feet on a potential fix to this horrifyingly dangerous trailer brake problem.

NHTSA ODI 11516316

Park/Emergency Brake system light illuminates and system engages when vehicle is placed from drive to park, and when system is shut down the light illuminates and engages. Also, when vehicle is started the park brake light shows to be engaged. When the vehicle is put in reverse the light is still illuminated while the vehicle is backing up. The light stays on while the vehicle is in backward motion. Safety concerns for me and my family are: 1. What if the Park Brake engaged while driving at normal speed - what could happen? 2. With vehicle parked and brake system engaged driver should not be able to put vehicle in reverse and back up without disengaging brake lever. The vehicle was taken to the local dealership service center twice to try to get resolution of the park brake light issue. They were unable to duplicate the issue and stated that according to Ford's maintenance policy there was nothing more that could be done. We have tried to contact Ford through their main customer service phone number. We literally spent hours on the phone trying to reach someone who could help us with the issue, but no one had an answer for us. A case file was made by Ford Customer Service and marked "RESOLVED". It has not been resolved. As stated, the park brake light started showing up in February 2022. As of this time there has not been an incident, but I can't rule out that something might happen. I think it should be addressed by the dealership and/or Ford engineer with more interest than just a dismissal attitude.

NHTSA ODI 11516021

This is a link to the Dashcam footage. Traveling 45mph in stop and go traffic. I braked (indicated by my hood dipping downwards) but failed to stop. Possible defect? Haven't had my truck back since the accident on 6/24/2022. https://youtu.be/HL7Iau0463I

NHTSA ODI 11508016

When traveling on a divided highway in the left lane with no vehicle ahead of me, as I am passing a vehicle in the right lane, just when I am about even with that vehicle beside me my truck applies the brakes firmly and unexpectedly. There is no associated warning message on the instrument panel display or audio alert like there is when it goes into collision avoidance. When it happened the first time I was very startled and worried it saw something that required braking but as it happens almost every time I pass someone I am getting used to it.

NHTSA ODI 11507617

The contact owns a 2021 Ford F-150. The contact stated that while driving at an undisclosed speed, the vehicle performed as if the parking brake was engaged. The vehicle was taken to the dealer where the failure could not be determined. The vehicle was then taken to another dealer where it was diagnosed that the tires were rubbing against the brake line and needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure and the contact was informed that the vehicle needed to be taken to the dealer for assistance. The failure mileage was approximately 47,000.

NHTSA ODI 11505408

The contact owns a 2021 Ford F-150. The contact stated that when the brake pedal was depressed, there was an abnormal sound heard. The vehicle was taken to a dealer, and the dealer confirmed there was no failure. In addition, the dashboard failed to work as needed. The vehicle was not diagnosed nor repaired by an independent mechanic or dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 10,000.

NHTSA ODI 11503258

The contact’s wife owns a 2021 Ford F-150. The contact stated that on numerous occasions while shifted into drive, reverse, or decelerating, there was a squeaking sound for approximately five minutes. No warning light was illuminated. The dealer was notified of the failure and the contact was informed that the possible cause was due to weather. The vehicle was not diagnosed or repaired. The contact referenced NHTSA Campaign Number: 21V533000 (Service Brakes, Hydraulic). The manufacturer was not notified of the failure. The failure mileage was unavailable.

NHTSA ODI 11502350

Brake failure, brake pedal went to floor had to firmly stand on peddle rear wheels eventually locked up and truck skidded to stop. warning lamps that lit up are check brake system, hill start assist not available, service advance trac, pre collision assist not available, ABS and brake light was illuminated. very dangerous situation. This is the second time this happened the first was September 2021 they replaced the brake booster at 7,000 miles this occurred again 12/25/2022.

NHTSA ODI 11498830

The contact owns a 2021 Ford F-150. The contact stated that while driving at an unknown speed and depressing the brake pedal, the traction control and several unknown warning lights were illuminated. The failure reoccurred while driving at various speeds and after depressing the brake pedal. The vehicle was then taken to a local dealer where it was diagnosed with needing to replace the electric brake booster. The contact referenced NHTSA Campaign Number: 21V533000 (Service Brakes, Hydraulic) as a possible solution however, the VIN was not included in the recall. The vehicle was not repaired. The manufacturer was made aware of the failure and confirmed that VIN was not included in the recall. The contact was advised to file complaint with the NHTSA Hotline. The approximate failure mileage was 35,000.

NHTSA ODI 11486865

I was driving with my wife and our one month old baby on I-25 in Albuquerque on a hot day (truck screen indicated 106 F) when suddenly the AdvanceTrac traction control, forward pre-collision braking, adaptive cruise control, and ABS system warnings all came on the dashboard. At the same time the brake pedal went limp (no braking action for the first ~50% of the pedal press). I slowed the truck by coasting for over a mile and picked an off-ramp that I expected to be empty before getting off the highway. Upon exiting the highway, I pressed the brake pedal all the way down and at 90-95% of the pedal compression the brakes finally engaged but locked up the rear wheels leading us to skip and skid across two lanes. We were able to come to a stop in the middle of the ramp and then gently moved over to the side of the exit, again locking up the rear wheels when we came to a stop. Upon turning the truck off and turning it back on again everything went back to normal suggesting that it was some subsystem that caused the electronic brake booster and ABS to become unresponsive. After a week at the local Ford dealer, the service technicians were able to find the error code C05CF. This error code appears to be officially only triggered by "Brake Master Cylinder Piston Position Sensor "B" -This DTC sets due to incomplete or improper module programming procedures." Which suggests this problem may have been lingering for over 30k miles of use. Ford technicians updated the traction control module firmware, body control module firmware, and then reproduced the issue leading them to perform an ABS system calibration which they claim fixed the issue. It is claimed that no component replacement was necessary, only software updates and calibration. Full dealer notes attached as .pdf It's crazy to think a software bug caused our brake system to almost entirely fail on the highway, particularly with an error code that should only have been able to been generated at the factory.

NHTSA ODI 11475348

Have had squeeking breaks since receiving the truck a year ago. Brought in and was told to watch for a letter they don't have the part that my breaks are safe but the squeeking has gotten a lot worse. Also the dash board lights turn on and off when the car is off. The other day driving at speed on the expressway the whole dash board turned off all gages went to zero than rebooted. I was coasting trying to figure out what was happening so not sure if I lost power. 3 faults were sent to my phone. Restraint fault abs fault and tire pressure fault all showed up.

NHTSA ODI 11469481

The contact owns a 2021 Ford F-150. The contact stated while driving 5 MPH, the brake pedal was depressed to the floorboard however, the vehicle failed to stop with several unknown warning lights illuminated. The contact stated that within several seconds, the brakes would engage and stop the vehicle. The contact took the vehicle to the local dealer to be diagnosed however, the mechanic was unable to determine the cause of the failure. The contact stated that the failure persisted. The manufacturer had not been informed of the failure. The failure mileage was approximately 6,000.

NHTSA ODI 11465376

My emergency brake engages in its own. It has done it more than 20times since I have owned the vehicle. The first time it happened was about a month after purchasing. The last time it engaged I was pulling into a parking spot a couple weeks ago. Sometimes it come on when parked and other times The brake light on the dash will flash at me if I am in motion as it engages. When I disengage the brake I can hear the noice as it retracts. I assume typically there is a safety if it engages at high speeds but If this can have a glitch it makes me nervous if it would engage at highway speed and cause an accident. I have small children that ride with me and makes me nervous. I have brought it to the attention of the dealership I bought the vehicle from and they could not find anything wrong. I plan on taking it to a Ford dealership closer to my home as I drove a distance to purchase my vehicle. I believe this to be a huge risk if it would lock up while driving.

NHTSA ODI 11452152

1) Pre-collision assist not available---- when starting after vehicle has been sitting off for one hour. Service AvanceTrac----when starting after vehicle has been sitting off for one hour. Hill start assist not available-----when starting after vehicle has been sitting off for one hour. Check brake system-------when starting after vehicle has been sitting off for one hour. All these warnings appear when starting the engine after vehicle has been sitting off for one hour. Yes, it is available. 2) I don't know if I restart the vehicle and warnings do not reappear if the components at fault still work. 3) Don't think it was reproduced. Showed dealer photos of warnings displayed on my dash. Dealer said no fix currently available. 4) No 5) All these warnings appear on the dash when starting the engine after vehicle has been sitting off for one hour. First appeared after starting on multiple occasions.

NHTSA ODI 11449636