2021 Ford F-350 SD fuel/propulsion system problems
14 owner complaints filed with NHTSA name the fuel/propulsion system on the 2021 Ford F-350 SD — 15% of all complaints for this model year.
What owners report
“The high pressure fuel pump failed sending metal shavings through out the entire fuel system. I had no heads up and the failure left me stranded on top of a bridge. I called 911 twice and finally the cops showed up and wrecker towed me off the bridge. Ford is aware of this known issue with this…”
filed Sep 3, 2026
“Vehicle went into limp mode and we towed it to the dealership. They ran diagnostics and found that the fuel filter was causing a fault for water in the fuel filter. They replaced the fuel filter and ran diagnostics again and it flagged failure for Low pressure fuel pump. They replaced the low…”
filed Aug 6, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Fuel/propulsion System problems in other F-350 SD years
| Year | Reports | Share |
|---|---|---|
| 2023 F-350 SD | 2 | 5% |
| 2022 F-350 SD | 8 | 7% |
| 2020 F-350 SD | 13 | 7% |
| 2019 F-350 SD | 14 | 3% |
| 2018 F-350 SD | 5 | 2% |
| 2017 F-350 SD | 24 | 4% |
| 2016 F-350 SD | 16 | 8% |
| 2015 F-350 SD | 22 | 11% |
| 2012 F-350 SD | 1 | 3% |
| 2011 F-350 SD | 4 | 9% |
| 2010 F-350 SD | 1 | 2% |
| 2008 F-350 SD | 2 | 2% |
Other reported problem areas on the 2021 Ford F-350 SD
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.