2021 Ford F-350 SD Engine cooling Problems
- Complaints
- 1about this part
- Share
- 1%of 98 total for the year
- Median mileage
- 92,567miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 1 complaints about the engine cooling of the 2021 Ford F-350 SD, 1% of the 98 complaints for this model year. Where a mileage was given, the median is 92,567 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“The contact owns a 2021 Ford F-350. The contact stated that while operating the vehicle, the check engine warning light remained illuminated. The vehicle was taken to the local dealer who diagnosed that the DEF Pump, DEF Pump Lines needed, and DEF heater element needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 92,567.”
NHTSA complaint #11719362, filed 2026-02, 92,567 milesRelated service bulletins
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Engine cooling: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2025 | 2 | 14% |
| 2024 | 1 | 2% |
| 2023 | 1 | 2% |
| 2022 | 3 | 3% |
| 2021 | 1 | 1% |
| 2019 | 2 | 0% |
| 2018 | 3 | 1% |
| 2017 | 2 | 0% |
| 2016 | 3 | 1% |
| 2015 | 3 | 1% |
| 2012 | 5 | 17% |
| 2011 | 5 | 12% |
| 2010 | 2 | 4% |
| 2009 | 2 | 11% |
| 2008 | 21 | 21% |
| 2006 | 16 | 13% |
| 2005 | 48 | 22% |
| 2004 | 42 | 32% |
| 2003 | 51 | 39% |
| 2002 | 41 | 33% |
| 2001 | 40 | 25% |
| 2000 | 41 | 26% |
| 1999 | 32 | 23% |
Other parts of the 2021 Ford F-350 SD
40 complaintsEngine
15 complaintsElectrical system
13 complaintsOther or unknown
10 complaintsTransmission and drivetrain
10 complaintsVisibility (wipers, defrost, mirrors)
7 complaintsBack-over prevention (rear camera)
5 complaintsSuspension
5 complaintsBrakes
4 complaintsLatches, locks and linkages
4 complaintsSteering
4 complaintsBody and structure
3 complaints
← All problems reported for the 2021 Ford F-350 SD
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology