AI Damage2018 Harley-Davidson Flhtcul: common problems
The maker issued 19 service bulletins for this year. Details by component below, with sources.
Key figures
- Technical service bulletins (TSB)
- 19
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Equipment | 0 | 0 | 7 |
| Powertrain | 0 | 0 | 5 |
| Electrical system | 0 | 0 | 4 |
| Engine | 0 | 0 | 3 |
| Service brakes | 0 | 0 | 3 |
| Engine and cooling | 0 | 0 | 1 |
| Fuel system | 0 | 0 | 1 |
| Steering | 0 | 0 | 1 |
| Wheels | 0 | 0 | 1 |
Comparison
What to check before buying
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Engine. Cold start, unusual noises, oil leaks and engine codes.
- Service brakes. Pedal feel, ABS operation, leaks, discs and hoses.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- GENUINE MOTOR PARTS AND MOTOR ACCESSORIES BULLETIN PAB1097 INTERNATIONAL FITMENT
THE BOOM! BOX GTS SOFTWARE UPDATE. PURPOSE: To notify International dealers that International GTS radios are now available to be ordered and installed in 2014-2018 Touring, CVO Touring and Trike models previously…
- SERVICE BULLETIN M1510
MILWAUKEE-EIGHT ENGINE - NEW OIL FILTER. REVISION. PURPOSE: To inform dealers of an improved oil filter for the Milwaukee-Eight® (MKE-8) engine. The new oil filter uses the same synthetic 5-micron media as the current…
- SERVICE BULLETIN M1510
MILWAUKEE-EIGHT ENGINE - NEW OIL FILTER. REVISION. PURPOSE: To inform dealers of an improved oil filter for the Milwaukee-Eightî (MKE-8) engine. The new oil filter uses the same synthetic 5-micron media as the…
- informs the dealer network that Boom!
software version 1.20.3 released December 19, 2016 and is now available to download. This also provides notice that revision 1.20.2 was found to be corrupt. Do not install version 1.20.2 and delete any stored copies.
- SERVICE BULLETIN M1450
MILWAUKEE-EIGHT EQUIPPED VEHICLES - LOSS OF POWER OR HIGH ENGINE BRAKING. Purpose: 2017 and 2018 model motorcycles equipped with a Milwaukee-Eight engine can experience a condition known as sumping during extended…
- TECH TIP TT462
TEAR-AWAY CABLE STRAP. Issue Description: Damage has occurred on some hand grips or brake levers when using side cutters to cut the cable strap that holds the keys in place. Reason for Tech Tip - The assembly plants…
- Phone Campaign - Request for dealers to inspect Touring rear disc mounting screws to investigate if…
Phone Campaign - Request for dealers to inspect Touring rear disc mounting screws to investigate if potential under-torque condition issue is present.
- TECH ARTICLE TA0021
Front Wheel Skid Spacer for 2018 Touring. Front fender damage caused by shipping spacer. The spacer is used to chock the tire in the skid correctly. This avoids shipping strap contact and possible damage to the front…
-
This bulletin helps the dealer locate needed information to update and service Boom! Box Audio Infotainment systems. It also lists software revisions and the fixes addressed in each revision.
- Phone Campaign - Updated, Request for dealers to inspect Touring rear disc mounting screws to investigate…
Phone Campaign - Updated, Request for dealers to inspect Touring rear disc mounting screws to investigate if potential under-torque condition issue is present.
- SERVICE BULLETIN M1450
MILWAUKEE-EIGHT WITH STAGE KITS - LOSS OF POWER OR HIGH ENGINE BRAKING. Revision. Purpose: 2017 and 2018 model motorcycles equipped with a Milwaukee-Eight? engine and a Stage III or Stage IV kit can experience a…
- SERVICE BULLETIN M1454
2018 TOURING AND SOFTAIL PLATFORMS - SCREAMIN' EAGLE STAGE II AND ADJUSTABLE PUSHROD INSTALLATION. Purpose: Dealers must order four washers (Part Number 6762D) separately when installing the kits listed on 2018…
NHTSA lists 19 bulletins for this year; the 12 newest are shown here.
Other years of this model
Questions and answers
What are the most common problems with the 2018 Harley-Davidson Flhtcul?
There are no owner complaints in the NHTSA data for this year; the data comes from 19 manufacturer service bulletins.
How many service bulletins (TSB) were issued for the 2018 Harley-Davidson Flhtcul?
NHTSA lists 19 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 2018 Harley-Davidson Flhtcul from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 2018 models
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-04.