2015 Harley-Davidson Flhtk Engine Problems
- Complaints
- 4about this part
- Share
- 40%of 10 total for the year
- Median mileage
- 6,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 4 complaints about the engine of the 2015 Harley-Davidson Flhtk, 40% of the 10 complaints for this model year. Where a mileage was given, the median is 6,000 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.
“Spark plug wire leading to front cylinder rubs against the fuel tank, leading to abrasion through the insulation of the spark plug wire. Replacement of park plug wire under warranty denied by fort bragg harley davidson. Abrasion through the insulation by contact of the fuel tank could lead to fire or explosion should the wire arc on the fuel tank or if fuel leaks.”
NHTSA complaint #11072438, filed 2018-02, 6,000 miles“After sitting in the sun approx. 8 hours, while in motion, engine died approx. 2 seconds when stopping, turning or accelerating. 1 time engine sputtered when it died at a stop, the other times engine just stopped running. Started right back up. Ok if fuel tank and PCM (seat) are covered or bike in garage. Been to dealership twice, they were unable to verify. Died several times from 3/18/17.”
NHTSA complaint #11143417, filed 2018-10, 6,000 miles“2015 harley davidson Flhtk. Consumer writes in regards to disturbing engine implosion. The consumer stated while driving at high speeds the engine on the vehicle blew.”
NHTSA complaint #11111614, filed 2018-07Related service bulletins
- 11032492Apr 25, 2026SERVICE BULLETIN M1727: BIG TWIN INNER PRIMARY SEAL CHANGES. PURPOSE: Initial release. This bulletin informs dealers of changes to the Inner Primary Seal (Part No. 12052). The…
- 11014014Jan 24, 2025SERVICE BULLETIN M1650: MILWAUKEE EIGHT AND TWIN CAM CAMSHAFT DRIVE GEAR RETENTION KIT CHANGES. PURPOSE: This bulletin informs dealers that changes have been made to the Camshaft…
- 11005514Jul 10, 2024GENUINE MOTOR PARTS AND MOTOR ACCESSORIES BULLETIN PAB1158: OIL FILTER PACKAGING AND CASE QUANTITY UPDATE. PURPOSE: To inform dealerships that Harley-Davidson has made updates to…
Engine: other model years
Other parts of the 2015 Harley-Davidson Flhtk
3 complaintsElectrical system
2 complaintsFuel system
2 complaintsBrakes
1 complaintsTransmission and drivetrain
1 complaints
← All problems reported for the 2015 Harley-Davidson Flhtk
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 28, 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