5 NHTSA owner complaints for the 2001 Ford F-350 mention the spark plug. 2 additional reports concern a related system category and are counted separately. Usable reported mileage (n=3) has a median of 218,000 mi.
Owner complaints whose text directly mentions this component.
Same vehicle, mapped category, part not named.
Replacement listings that match this model year.
These figures describe mileage reported in owner complaints submitted to NHTSA. They do not represent the failure rate of all vehicles.
5 NHTSA owner complaints for this model year mention the spark plug.
2 additional reports are coded to a related system category but do not name this part. Those counts are kept separate and are not treated as spark plug failures.
Among 3 direct-mention reports with usable odometer data, the median reported mileage is 218,000 mi.
25th percentile 32,390 mi; 75th percentile 240,000 mi. These figures describe mileage reported in owner complaints submitted to NHTSA. They do not represent the failure rate of all vehicles.
Mechanically related parts include ignition coil. Similar symptoms can come from those parts or from the broader system, not only from a failed spark plug.
Use the related-component links on this page when those combinations are published. A system-category NHTSA report is not proof that this specific part failed.
Direct mentions are NHTSA owner narratives that contain this component or an accepted alias. Related-system counts are complaints in a mapped category that do not name the part. They are never merged. Mileage statistics use odometer values from 1 to 400,000 miles. This is not a failure rate.