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NHTSA owner reports · September 18, 2026 snapshot.

37 crash reports1 fire reports57 injury reports

Service Brakes complaints

26 reports

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22,000 miles · Oct 4, 2016

Service Brakes

BRAKES FAILED WHILE DRIVING. AFTER SEVERAL ATTEMPTS AND RUNNING OFF ROAD IT FINALLY ALLOWED ME TO DEPRESS BREAK PEDAL. BREAK PEDAL HAD BECOME STUCK AND WHEN IT FINALLY WORKED THERE WAS AN AWKWARD SOUND.

NHTSA ODI #10913822

12,000 miles · Aug 8, 2016

Power TrainService BrakesStructureCrash

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MY WIFE AND I PARK OUR 2015 FORD EXPLORER XLT IN THE PARKING AREA IN FRONT OF OUR HOUSE. IN ORDER TO GO ANYWHERE, WE NEED TO BACK IT OUT OF ITS PARKING SPOT, REVERSE-TURN TO THE RIGHT, APPLY THE BRAKES, PUT THE VEHICLE IN DRIVE, AND FINALLY DRIVE FORWARD ON THE DRIVEWAY UNTIL REACHING THE STREET. THIS MORNING, MY WIFE PLANNED TO GO TO THE STORE. SHE ENTERED THE VEHICLE, STARTED IT, PUT IT IN REVERSE, AND PROCEEDED TO BACK OUT OF THE PARKING SPOT. AS USUAL, SHE APPLIED THE BRAKES TO STOP THE CAR AND PUT IT IN DRIVE, BUT UNFORTUNATELY, THIS MORNING THE BRAKES DID NOT RESPOND. SHE APPLIED THE BRAKES A FEW MORE TIMES TO NO AVAIL. AFTER THAT DID NOT WORK, SHE APPLIED THE EMERGENCY BRAKE, WHICH DID NOT DO ANYTHING EITHER. FINALLY, SHE TURNED OFF THE ENGINE AND PUT THE CAR IN PARK, WHICH DIDN'T DO ANYTHING EITHER. SHE ENDED UP DOING A U-TURN IN REVERSE. MY OTHER TRUCK WAS PARKED TO THE RIGHT OF WHERE THE FORD EXPLORER WAS PARKED, SO ONCE THE FORD EXPLORER REACHED MY PARKED TRUCK AND COLLIDED WITH IT, THE FORD EXPLORER FINALLY STOPPED. IN ADDITION TO MY WIFE, OUR TWO SONS AGED 6 AND 8, WERE INSIDE THE VEHICLE WITH HER WHEN THIS HAPPENED. WE HAVE ATTACHED A PHOTO OF THE FORD EXPLORER COLLIDED ONTO MY PARKED TRUCK (A FORD F150), WHICH IT HAD TO DO IN ORDER TO STOP AND NOT COLLIDE INTO ANYTHING OR ANYONE ELSE. THE MAIN REASON WE GOT A FORD EXPLORER IS BECAUSE WE BELIEVED IT WOULD BE A STURDY SUV THAT WOULD KEEP MY WIFE AND KIDS SAFE, SO THIS INCIDENT IS EXTREMELY CONCERNING. THE CAR IS ALMOST NEW WITH APPROXIMATELY 12,000 MILES AND WE HAVE HAD ALREADY HAD TO TAKE IT INTO THE REPAIR SHOP APPROXIMATELY EIGHT TIMES. WE HAVE ASKED FORD TO REPLACE IT, BUT THEY HAVE NOT BEEN WILLING TO DO SO, WHICH IS WHY WE ARE ESCALATING THIS MATTER TO REGULATING AGENCIES FOR RESOLUTION AS WELL AS OUT OF CONCERN FOR OTHER FAMILIES WHO MAY HAVE HAD A SIMILAR EXPERIENCE.

NHTSA ODI #10894252

10,300 miles · Jun 13, 2016

Service BrakesSteering

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APRIL 23 - BACKING OUT OF A PARKING SPACE A POWER STEERING FAULT MESSAGE FLASHED ON THE SCREEN, THERE WAS NO CHANGE IN THE STEERING OF THE VEHICLE AT THE TIME. APRIL 26 - SAME MESSAGE APPEARS WHILE DRIVING DOWN THE INTERSTATE, WHEN BACKING INTO A PARKING SPOT THE STEERING COMPLETELY LOCKED UP, TWO OTHER MESSAGES APPEARED ON THE SCREEN AT THIS TIME. PICTURES ARE INCLUDED. VEHICLE WAS TAKEN TO THE DEALERSHIP THE FOLLOWING MORNING. THEY CONCLUDED THAT THE STEERING CONTROL MODULE NEEDED TO BE REPLACED, AND THAT THE ISSUE WAS RESOLVED. PICKED THE VEHICLE UP ON MAY 2. JUNE 2 - THE SAME POWER STEERING FAULT MESSAGE SHOWED UP AGAIN WHILE DRIVING ON A NEIGHBORHOOD STREET. THE SAME MESSAGES AS BEFORE PLUS ONE MORE (TERRAIN MANAGEMENT FAILURE) APPEARED ON THE SCREEN WHEN TURNING LEFT ON A RURAL ROAD AND THE STEERING LOCKED COMPLETELY AGAIN. VEHICLE WAS RETURNED TO THE DEALERSHIP THE FOLLOWING MORNING. THE VEHICLE HAS BEEN AT THE DEALERSHIP FOR 9 BUSINESS DAYS AT THIS TIME. NO PROGRESS HAS BEEN MADE. THEY SAY THE PROBLEM CAN NOT BE DUPLICATED, EVEN THOUGH THE VEHICLE DIAGNOSTIC AND PHOTOS OF THE MESSAGES WERE PROVIDED. THE DIAGNOSTIC STATED, "URGENT SERVICE REQUIRED." THE FORD HOTLINE IS UNWILLING TO MAKE ANY REPAIRS UNLESS THE PROBLEM CAN BE DUPLICATED WHILE IN THE DEALERSHIPS POSSESSION. MEANWHILE I AM CURRENTLY MAKING PAYMENTS ON THIS VEHICLE. THE VEHICLE HAS BEEN IN MY POSSESSION FOR 9 MONTHS AND HAS 10,300 MILES ON IT. I WAS TOLD I HAVE A RENTAL FOR 1 WEEK, REGARDLESS OF WHETHER THE PROBLEM IS RESOLVED OR NOT.

NHTSA ODI #10873950

7,400 miles · Sep 8, 2015

Service BrakesSteering

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UPON STARTING VEHICLE STEERING SYSTEM WAS UNRESPONSIVE AND A WARNING NOTICE "SERVICE ADVANCE TRACK" APPEARED ON DASH. DEALER HAD VEHICLE FOR SEVERAL DAYS AND COULD NOT DUPLICATE MALFUNCTION. RETURNED WITHOUT REPAIR. FAULT RECURRED AFTER APPROXIMATELY ONE WEEK AND DEALER AGAIN COULD NOT DUPLICATE FAULT. REPLACED ONE ELEMENT OF ELECTRONIC STEERING SYSTEM AND RETURNED VEHICLE AS REPAIRED. FAULT RECURRED A THIRD TIME AND A DIFFERENT DEALER SERVICE DEPARTMENT REPLACED A SECOND ELEMENT OF THE ELECTRONIC STEERING SYSTEM AND CLAIMED ISSUE WAS RESOLVED. FAULT CONTINUES TO RECUR WITHOUT NOTICE AND VEHICLE IS UNRELIABLE. PROBLEM HAS BEEN REPORTED TO FORD CUSTOMER RELATIONSHIP CENTER ON SEVERAL OCCASIONS BUT RESPONSE HAS BEEN VERY LIMITED.

NHTSA ODI #10762263

Mileage unknown · Apr 15, 2015

Service Brakes

TL* THE CONTACT OWNS A 2015 FORD EXPLORER. THE CONTACT STATED THAT THE BRAKE LINE ON THE FRONT PASSENGER AND FRONT DRIVER SIDE FRACTURED. THE VEHICLE WAS TOWED TO A DEALER WHO DIAGNOSED THAT THE FRONT BRAKE LINE NEEDED TO BE REPLACED. AN AUTHORIZED DEALER REPLACED THE FRONT DRIVER AND PASSENGER SIDE BRAKE LINES. THE VEHICLE WAS …

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NHTSA ODI #10705832

3,000 miles · Dec 15, 2014

Service Brakes

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I WAS DRIVING YESTERDAY AND A MESSAGE POPPED UP "TERRAIN MANAGEMENT SYSTEM FAULT" AND THEN ALL OF A SUDDEN, A CHECK BRAKES MESSAGE SHOWED, LEAVING THE BRAKE INDICATOR, ABS MESSAGE SAYING IT IS OFF AND AN "AWD OFF" MESSAGE. THIS HAPPENED REPEATEDLY EVEN AFTER TURNING THE CAR OFF FOR HOURS AND RESTARTING. PICTURES WERE TAKEN OF THE MESSAGES AND IT WAS DROPPED AT THE SERVICE DEPARTMENT OF THE LOCAL FORD DEALERSHIP. THEY ORIGINALLY THOUGHT IT WAS A BAD ABS SENSOR, BUT UPON FURTHER INVESTIGATION, SOMETHING IS REALLY WRONG IN THE COMPUTER AND SOME OTHER MODULES, THEY DID NOT EVEN GIVE US A TIME FRAME FOR COMPLETION. THIS IS NEXT YEARS MODEL AND WE HAVE ONLY OWNED IT FOR 1 MONTH, NOT A GOOD SIGN. NOT SURE IF OTHER PEOPLE ARE HAVING THIS ISSUE, BUT THEY MIGHT SOON. THE DEALERSHIP WOULD ALSO NOT SAY IF IT WAS/IS DANGEROUS TO DRIVE WITH ALL OF THE ERRORS POPPING UP. *TR

NHTSA ODI #10664314

Official recalls

25V695000 · Back Over Prevention: Sensing System: Camera

Oct 13, 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.

Consequence & remedy

Consequence: A rearview camera that fails to properly display an image can reduce the driver’s view behind the vehicle, increasing the risk of a crash.

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.

24V031000 · Structure:body:roof And Pillars

Jan 19, 2024

Ford Motor Company (Ford) is recalling certain 2011-2019 Explorer vehicles. The A-pillar trim retention clips may not be properly engaged, allowing the trim to detach.

Consequence & remedy

Consequence: A detached trim piece can fall off the vehicle, becoming a road hazard and increasing the risk of a crash.

Remedy: Dealers will inspect and replace the A-pillar trim as necessary, free of charge. This will be a phased campaign, with the remedy becoming available in different phases based on model years. Owner notification letters were mailed between July 18, 2024 and December 16, 2025. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 24S02.

21V537000 · Suspension:rear

Jul 15, 2021

Ford Motor Company (Ford) is recalling certain 2013-2017 Explorer vehicles originally sold, or ever registered, in Connecticut, Delaware, Illinois, Indiana, Iowa, Kentucky, Maine, Maryland, Massachusetts, Michigan, Minnesota, Missouri, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Vermont, Virginia, West Virginia, Wisconsin, and the District of Columbia. Exposure to road salt can cause the cross-axis ball joint to corrode and seize, resulting in a fracture of the outboard section of the rear suspension toe link.

Consequence & remedy

Consequence: A rear toe-link fracture can result in a loss of steering control, increasing the risk of a crash.

Remedy: Dealers will inspect and replace as necessary, the cross-axis ball joint (CABJ) knuckle, and replace the rear suspension toe links, free of charge. This recall is an expansion of previous NHTSA recall numbers 16V-245, 19V-435, and 20V-675. Certain vehicles previously repaired will need to return for the new remedy. An interim notification letter notifying owners of the safety risk were mailed on September 10, 2021. Owner notification letters were mailed on March 16, 2022. Owners may contact Ford's customer service at 1-866-436-7332. Ford's number for this recall is 21S32.

20V675000 · Suspension:rear

Mar 12, 2021

Ford Motor Company (Ford) is recalling certain 2013-2017 Explorer vehicles originally sold, or currently registered in Connecticut, Delaware, the District of Columbia, Illinois, Indiana, Iowa, Kentucky, Maine, Maryland, Massachusetts, Michigan, Minnesota, Missouri, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Vermont, Virginia, West Virginia, and Wisconsin that were previously repaired under a prior recall numbers 16V-245 or 19V-435. The outboard section of a rear suspension toe link may fracture.

Consequence & remedy

Consequence: A rear toe link fracture can result in a loss of steering control, increasing the risk of a crash.

Remedy: Ford will notify owners, and dealers will inspect the cross-axis ball joint (CABJ) knuckle attached to the rear suspension toe link and replace it as necessary, free of charge. The recall began November 27, 2020. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 20S62.

20V692000 · Power Train:axle Assembly:axle Shaft

Nov 10, 2020

Ford Motor Company (Ford) is recalling certain 2014-2016 Explorer, 2014-2015 Taurus and 2014 Edge vehicles equipped with 2.0L or 2.3L engines and front wheel drive. The support bracket for the front drive axle halfshaft may fail.

Consequence & remedy

Consequence: The failed bracket could result in a loss of park function which can cause unintended vehicle movement, and loss of motive power while driving which increases the risk of a crash.

Remedy: Ford will notify owners, and dealers will replace the link shaft bracket, free of charge. Parts are not currently available. Owners received an interim notification detailing safety risk December 8, 2020. A second letter will be mailed when parts become available in January 2021. The recall began February 2, 2021. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 20S63.

19V435000 · Suspension:rear

Jun 10, 2019

Ford Motor Company (Ford) is recalling certain 2011-2017 Explorer vehicles. The rear suspension toe links may fracture due to stress on the rear suspension.

Consequence & remedy

Consequence: A fractured rear toe link will cause a sudden change in vehicle handling and increase the risk of a crash.

Remedy: Ford will notify owners, and dealers will replace the rear suspension toe links, and inspect both rear toe link ball joints, replacing the rear wheel knuckle(s), if necessary, free of charge. The recall began June 26, 2019. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 19S17.

16V245000 · Suspension:rear

Apr 26, 2016

Ford Motor Company (Ford) is recalling certain model year 2014-2015 Ford Explorer vehicles manufactured January 17, 2014 to May 31, 2014. The affected vehicles may have improperly welded rear suspension toe links that may fracture.

Consequence & remedy

Consequence: A fracture of the rear suspension toe link may result in a loss of steering control, increasing the risk of a crash.

Remedy: Ford will notify owners, and dealers will replace the rear suspension toe links, free of charge. The recall began on November 18, 2016. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 16S18.

15V464000 · Parking Brake

Jul 24, 2015

Ford Motor Company (Ford) is recalling certain model year 2015 Ford Taurus, Ford Flex, and Lincoln MKS vehicles manufactured May 4, 2015, to May 23, 2015, Lincoln MKT vehicles manufactured May 4, 2015, to May 21, 2015, and 2015-2016 Ford Explorer vehicles manufactured May 4, 2015, to May 23, 2015. The affected vehicles have a parking brake that may not fully engage when applied. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 135, "Light Vehicle Brake Systems."

Consequence & remedy

Consequence: If the parking brake does not fully engage and the transmission is left in a gear other than 'Park' while on a slope, the vehicle may roll away, increasing the risk of a crash.

Remedy: Ford will notify owners, and dealers will test the operation of the parking brake system, and if necessary, replace the parking brake control assembly, free of charge. The recall began on September 4, 2015. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 15C07.

Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗

NHTSA investigations

PE23001 · Windshield Trim Molding Item Detachment

Opened Jan 27, 2023 · Closed Feb 8, 2024

Status: closed (inferred from source dates) · Structure:body:roof And Pillars

On January 27, 2023, the Office of Defects Investigation (ODI) opened PE23-001 to investigate allegations of A-pillar trim panel detachment on model year (MY) 2011-2019 Ford Explorer vehicles. At the time of opening, the office had received 164 Vehicle Owner Questionnaires (VOQs) reporting this failure. ODI has received 671 VOQs regarding this failure, including 1 alleged crash and 2 alleged injuries. Some consumers have reported that the failure occurred while they were driving at highway speeds, with the detached trim panel entering the path of travel of the vehicle behind them, requiring the driver of the following vehicle to take evasive action. It is noteworthy that motorists who experience this type of road hazard are less likely to accurately identify the subject vehicle the item detached from and report the event to the NHTSA. In its April 17, 2023 response to ODI’s information request, Ford provided 175 consumer complaints (including field reports) and 14,162 warranty claims related to A-pillar trim panel detachment. Ford relayed that the subject vehicles utilize a plastic A-pillar bracket, which is bolted to the vehicle structure during assembly. The A-pillar trim panel is attached to the bracket utilizing 7 plastic clips. Contributory factors which have been identified by Ford as leading to the subject defect include incomplete installation at the assembly plant, inadequate part stack up, damage to fasteners during installation, and failure to follow proper repair procedure during windshield replacements or other services. On January 19, 2024, Ford filed safety recall 24V-031 for MY 2011-2019 Ford Explorer vehicles to address the subject defect. In the Part 573 Safety Recall Report, Ford identified that a detached A-pillar trim panel can create a road hazard for other road users, increasing the risk of a crash. The recall remedy includes an inspection of the existing A-pillar trim panel and, if necessary, the replacement of the component. The remedy A-pillar trim panels will be installed with an additional adhesive for robustness and utilize an inspection procedure to ensure full engagement of all the retention clips during installation. In view of the recall action being taken by Ford, ODI is closing this Preliminary Evaluation. The agency reserves the right to take additional action if warranted by future circumstances. To review the reports cited in the Closing Resume ODI Report Identification Number document, go to NHTSA.gov.

EA17002 · Exhaust Odor In Passenger Cab

Opened Jul 27, 2017 · Closed Jan 17, 2023

Status: closed (inferred from source dates) · Engine And Engine Cooling:exhaust System:manifold/header/muffler/tail Pipe; Structure:body

During the EA17-002 investigation, the agency reviewed and analyzed reports of exhaust odors in the passenger cabins of Model Year 2011 to 2017 Ford Explorers. This investigation required an approach that incorporated knowledge and expertise from the automotive, medical, environmental health, and occupational safety fields. The agency conducted an in-depth investigation that encompassed the review of over 6,500 consumer complaints, conducting field inspections, and testing the relevant vehicles, both independently and in coordination with Ford and other entities. During the investigation, the evolution of Ford service bulletins intended to reduce the level of exhaust odors and carbon monoxide (CO) entering the occupant compartment was examined and independent tests to evaluate the effectiveness of the final Field Service Actions (FSA) for both consumer and police vehicles were conducted. As part of the investigation, the agency also examined the effects of cracked exhaust mani-cats on the measured CO levels in the vehicles and tested the FSA repairs to ensure they did not adversely impact occupant compartment CO levels due to cracked mani-cats.The investigation identified upfitting issues for Police Interceptor vehicles. Upfitting (sirens, lights, cages, auxiliary power, etc.) is typically performed by governmental fleet operations, independent repair facilities, or local Ford dealers after the sale of the new vehicle. Sealing issues caused by upfitting were responsible for the highest measured carbon monoxide levels in tested vehicles. The police FSA instructs how to inspect the quality of the vehicle upfits and how to properly seal any leaks caused by these upfits, at no cost to the police agency. Similarly, the highest CO levels measured in consumer vehicles were usually traced to sealing issues caused by rear crash damage where the repairs did not ensure sealing integrity. The most recent Ford FSA procedure for both the police (17B25) and consumer vehicles (17N03) includes an HVAC reprogramming operation. Tests by Ford and NHTSA have demonstrated a substantial reduction of CO levels due solely to the HVAC reprogramming. Other FSA repairs also demonstrated measurable contributions to CO level reductions during controlled tests.Throughout the investigation, vehicles accurately measured with higher levels of carbon monoxide were almost always affected by upfitter alterations, damage, or other causes compromising rear passenger cabin seals.NHTSA received thousands of reports alleging odors which triggered a variety of physiological responses, predominately nausea, headaches, and lightheadedness. NHTSA focused the investigation on accurately measuring vehicle CO levels, and accurately measuring carboxyhemoglobin (COHB) levels from properly administered blood tests. Using rigorous test methods to produce exhaust gas intrusion in vehicles with a properly performed FSA, occupant compartment CO levels remained below current environmental limits for CO in any environment (EPA ambient air quality standards). Furthermore, even without FSA repairs, no vehicles unaffected by upfitter issues or prior crash damage were identified with CO levels that exceed accepted occupational CO exposure levels. This investigation finds that the 2011-2017 Ford Explorer vehicles when accurately measured produce occupant compartment CO levels which fall below current accepted health standards, and could not identify COHB levels for vehicle drivers or other occupants, which exceeded thresholds for acute physiological effects. Therefore, the agency has not identified a defect that represents an unreasonable risk to motor vehicle safety.This inve

Additional source detail variants (2)

Engine And Engine Cooling:exhaust System:manifold/header/muffler/tail Pipe

Structure:body

PE16008 · Ford Explorer Exhaust Odor

Opened Jul 1, 2016 · Closed Sep 12, 2017

Status: closed (inferred from source dates) · Engine And Engine Cooling:exhaust System; Structure:body

During the National Highway Traffic Safety Administration?s (NHTSA?s) investigation into the Ford carbon monoxide allegations, the Office of Defects Investigation (ODI) identified additional Vehicle Owner Questionnaire (VOQ) reports with similar exhaust odor claims.Presently, ODI has identified 791 VOQs for Model Year 2011-2017 Ford Explorers pertaining to exhaust odor claims.ODI has identified three crashes and 41 injuries potentially linked this issue.The reported injuries range from unspecified to loss of consciousness, with the majority being nausea, headaches, or dizziness ? all of which can be symptomatic of carbon monoxide exposure.Additionally, Ford provided 2,400 reports including owner complaints, warranty claims, dealer field reports, and legal claims, that involve 2,051 vehicles that may be connected to the exhaust odor issue.NHTSA's Vehicle Test and Research Center tested multiple vehicles, including complaint vehicles, during the investigation.ODI also conducted field inspections of complaint vehicles and crashes involving police units that occurred while the officers were on duty.When possible, data was collected to quantify carbon monoxide levels in the examined vehicles.Based on the information gathered to date, NHTSA upgraded this investigation to an Engineering Analysis (EA17-002).

Additional source detail variants (2)

Engine And Engine Cooling:exhaust System

Structure:body

EA15005 · Front Brake Hose Failure

Opened Sep 28, 2015 · Closed Nov 2, 2018

Status: closed (inferred from source dates) · Service Brakes, Hydraulic:foundation Components:hoses, Lines/piping, And Fittings

On April 29, 2015, the Office of Defects Investigation (ODI) opened PE15-017 to investigate a report alleging incidents of front brake hose failure in model year (MY) 2015 Ford Explorer Police Interceptor vehicles used by the Sacramento Police Department in its pursuit driving training program (VOQ 10705832).On September 28, 2015, ODI upgraded the investigation to an Engineering Analysis (EA15-005) to assess maximum front caliper crimp temperatures under various test conditions, test hose assemblies removed from police interceptor service for any signs of thermal degradation, and further assess field data for evidence of a defect trend related to the alleged defect.The alleged defect results from exposure to extremely high heat at the caliper-side hose crimp. NHTSA?s vehicle testing suggests that the conditions necessary to produce the critical temperatures in the subject components result from drive-soak intervals that can occur during the Sacramento training program.NHTSA's testing of hose assemblies returned from police interceptor service did not identify any evidence of thermal degradation.NHTSA has not confirmed any incidents of caliper crimp failures due to overheating in vehicles not subjected to the Sacramento training course driving.The low number of hose assembly failure reports and the absence of any verified incidents of heat related front brake hose crimp failures since 2015 suggests that the Sacramento PD incidents resulted from conditions unique to the training program.A safety related defect trend has not been identified at this time and further use of Agency resources does not appear to be warranted.Accordingly, this investigation is closed.The closing of this investigation does not constitute a finding by NHTSA that a safety-related defect does not exist.The Agency will take further action if warranted by the circumstances.For additional information, see the Closing Report in the document file for EA15-005 on www.nhtsa.gov.

PE15017 · Front Brake Hose Failure

Opened Apr 29, 2015 · Closed Sep 28, 2015

Status: closed (inferred from source dates) · Service Brakes, Hydraulic:foundation Components:hoses, Lines/piping, And Fittings

On April 29, 2015, the Office of Defects Investigation (ODI) opened PE15-017 to investigate reports of low-mileage failures of front brake jounce hoses in model year (MY) 2015 Ford Explorer Police Interceptor vehicles operated as training vehicles by the City of Sacramento, California (ODI VOQ No. 10705832). To date, the Sacramento police fleet has reported a total of 7 front hose failures in 5 different Explorer Police Interceptor vehicles used for its Emergency Vehicle Operation Course (EVOC) training. Most of the failures occurred within the first few miles of service on a closed course used for the EVOC program, which includes evasive accident avoidance and pursuit maneuver training. The hose assemblies either leaked at, or pulled completely free from, the caliper-end attachment where the hose is crimped to the steel end fitting. Most of the failures resulted in a sudden loss of braking performance that caused the vehicle to run off the intended course. None of the failures resulted in any crashes, injuries or property damage.The subject MY 2015 hose assemblies are similar in design to hoses used on MY 2013 through 2014 Explorer Police Interceptor and civilian vehicles. The 5 vehicles used by Sacramento EVOC have all been repaired using MY 2016 front hose assemblies that have been changed to incorporate a short steel tube attached to the caliper end banjo block. No failures have been experienced by the Sacramento fleet to date in the other 37 MY 2014-2015 Explorer Police Interceptor vehicles (2 MY 2014 and 35 MY 2015) used by the fleet in regular law enforcement duty cycles unrelated to the EVOC training. In its response to ODI's information request letter for PE15-017, Ford provided information about 2 additional failures reported by other fleets, including 1 involving a Sacramento Regional Transit vehicle that occurred while being driven on the street.Based on its analysis of failed parts returned from the Sacramento fleet and the fleet's EVOC training duty cycle, Ford attributes the Sacramento fleet hose failures to excessive temperatures produced during hot-soak portions of the EVOC training duty cycle (when the vehicles are stationary after hard braking exercises, with no cooling air flow through the brake rotor vents and across the other brake components). During testing conducted to replicate the EVOC duty cycle, Ford measured temperatures at the subject crimp fittings that exceeded the design limits of the brake hose material after several successive training intervals and hot soaks. Ford has provided the Sacramento fleet with modified replacement hose assemblies for all of its MY 2014-15 Explorer Police Interceptor vehicles. The replacement hose assemblies were developed for use in MY 2016 Explorer vehicles and were modified slightly to accommodate the addition of a ride height sensor in those vehicles. The revised assemblies have an additional length of brake pipe between the caliper end connection and the subject crimp ferrule that results in additional heat dissipation and makes the assemblies more robust to the severe thermal effects experienced during the EVOC testing (the hose material is the same in both assemblies). Ford believes that the excessive temperatures experienced at the crimp fitting in the subject vehicles are unique to the EVOC duty cycle, have not been observed in the standard on-road severe duty cycle testing performed by Ford and police fleets who routinely conduct such testing and are not likely to occur in service usage for on-road Explorer Police Interceptor vehicles.This preliminary evaluation is closed, an Engineering Analysis (EA15-005) has been opened to conduct testing and further

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