2026 softail crankcase porosity screening
Harley-Davidson technical service bulletin M1739 for 2026 Harley-Davidson FXD, 2026 Harley-Davidson Fxlrst and 2026 Harley-Davidson FLHC and others.
- Bulletin number
- M1739
- Component
- Engine
- Summary
- SERVICE BULLETIN M1739: 2026 SOFTAIL CRANKCASE POROSITY SCREENING. PURPOSE: Initial Release. This bulletin informs dealers of a concern with crankcase porosity on certain 2026 Softail models. This manufacturing concern may result in an oil leak from the crankcase in the area between the oil pressure switch and oil filter. See Figure 1 and Figure 2. Dealers will be instructed to screen NEW UNSOLD units after an idle period to check for the concern prior to the vehicle being retailed.
Owners of these vehicles have filed 2 complaints in the engine category.
Vehicles covered
VIN decoder
See the problems and recalls for an exact car
Buying a used Harley-Davidson FXD?
Check the exact car before you pay: accidents, salvage or flood titles, odometer readings and previous owners.
Check its history