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What 12 owners told NHTSA about the 2011 Ford F-550

These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.

All (12)Crash / fire / injury (1)Engine (6)Fuel system (2)Fuel System, Diesel (2)Body & structure (1)Engine & cooling (1)Equipment (1)Parking Brake (1)Speed control (1)Steering (1)Transmission & drivetrain (1)

6 of 12 complaints match · Engine · clear filters

Dec 6, 2024Engine

The contact owns a 2011 Ford F-550. The contact stated while starting the vehicle, there was a loud knocking sound coming from the engine. The check engine warning light was illuminated. The vehicle was taken to an independent mechanic and was diagnosed with a failure in cylinder #8 and with engine failure. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. The dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure and referred the contact to the NHTSA Hotline for assistance. The approximate failure mileage was 49,000. The VIN was not available.

NHTSA ODI 11629240

Dec 4, 2024Engine

The contact's local fire department owns a 2011 Ford F-550. The contact stated that while driving at 45 MPH, the vehicle stalled out as several warning lights appeared on the instrument panel. The contact made multiple attempts to restart the engine but the failure persisted. Due to the failure, the vehicle was towed to an independent mechanic where a diagnostic was performed. The mechanic discovered diesel fuel in the oil reservoir which had resulted in engine failure. Upon investigation, the mechanic referred the contact to the manufacturer for assistance. The manufacturer was notified of the failure and informed the contact that the vehicle was not covered under warranty or recall. The manufacturer then referred the contact to the NHTSA Hotline to file a safety complaint. The vehicle was not repaired. The failure mileage was approximately 6,500.

NHTSA ODI 11628877

Apr 22, 2020EngineFuel system

TL* THE CONTACT OWNS A 2011 FORD F-550. THE CONTACT STATED HE RECEIVED A NOTICE THAT THE VEHICLE HAD TWO LININGS IN THE INTERNAL PART OF THE VEHICLE WHICH BOTH UNEXPECTEDLY DETACHED AND CONTAMINATED THE FUEL IN FUEL TANK. THE CONTACT STATED THE FAILURE CAUSED THE ENGINE TO FAIL. THE VEHICLE WAS TOWED TO A UNKNOWN LOCAL DEALER FOR A DIAGNOSTIC TESTING WHICH TOOK THREE MONTHS. THE DIAGNOSIS RESULTS WAS CONTAMINATION FROM THE FUEL TANK. THE VEHICLE WAS REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE HOWEVER OFFERED NO ASSISTANCE. THE FAILURE MILEAGE WAS 24,000. *BF*JB

NHTSA ODI 11321894

Jun 7, 2017Engine

ENGINE SHUTTING OFF & WILL NOT RE-START AFTER. WILL RESTART AFTER IT SITS FOR A COUPLE HOURS. HAS BEEN INTO TUTTLECLICK FORD SEVERAL TIMES FOR REPAIR OF THIS ISSUE. STILL NOT FIXED.

NHTSA ODI 10993685

Jan 22, 2015Engine

TL*THE CONTACT OWNS A 2011 FORD F-550. THE CONTACT STATED THAT WHILE DRIVING AT APPROXIMATELY 5 MPH, THE VEHICLE STALLED. THE VEHICLE WAS ABLE TO RESTART AFTER MULTIPLE ATTEMPTS. THE VEHICLE WAS TOWED TO A DEALER FOR DIAGNOSTIC TESTING THE MECHANIC DIAGNOSED CONTAMINATION IN THE FUEL. THE VEHICLE WAS REPAIRED. THE CONTACT REFERENCED NHTSA CAMPAIGN NUMBER: 13V535000 (ENGINE). THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 19,000. MA 07/30/15 UPDATED 9/19/2017*CN

NHTSA ODI 10678302

Jun 4, 2014Engine

FORD HAS A TSB ON A CYLINDER #5 GLOWPLUG FAILURE THAT CAUSES ENGINE FAILURE. COINCIDENTALLY, THEIR WARRANTY ON A 6.7 DIESEL IS TO 100,000 MILES. MINE FAILED AT 104,000. FORD IS NOT COVERING IT. THIS IS GOING TO COST ME $13,000. THE ITEM SHOULD BE A RECALL. *TR

NHTSA ODI 10596057

Working with the data? Download all 12 complaints as CSV · fetched from NHTSA July 19, 2026

How to use these: a complaint is one owner’s report, filed voluntarily and published unverified. Patterns matter more than any single story. If several owners describe the same failure at similar mileage, put that system at the top of your pre-purchase inspection list. Back to the full 2011 Ford F-550 verdict →