AI Damage2006 Harley-Davidson Flhtcui: common problems
Owners of the 2006 Harley-Davidson Flhtcui filed 15 complaints with NHTSA, most often about service brakes and engine and cooling. Details by component below, with sources.
Key figures
- Owner complaints
- 15
- involving a crash
- 2
What fails most often
- 1 Service brakes 40% of all complaints
- 2 Engine and cooling 20% of all complaints
- 3 Tires 13% of all complaints
- 4 Electrical system 7% of all complaints
- 5 Exterior lighting 7% of all complaints
- 6 Fuel system 7% of all complaints
- 7 Structure 7% of all complaints
- 8 Vehicle speed control 7% of all complaints
- Service brakes: 6 complaints (40% of all).
- Engine and cooling: 3 complaints (20% of all).
- Tires: 2 complaints (13% of all), 1 of them with a crash reported by the owner.
- Electrical system: 1 complaints (7% of all).
- Exterior lighting: 1 complaints (7% of all).
Symptoms owners describe
How many of the 15 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Service brakes | 6 | 0 | 0 |
| Engine and cooling | 3 | 0 | 0 |
| Tires | 2 | 1 | 0 |
| Electrical system | 1 | 0 | 0 |
| Exterior lighting | 1 | 0 | 0 |
| Fuel system | 1 | 1 | 0 |
| Structure | 1 | 0 | 0 |
| Vehicle speed control | 1 | 0 | 0 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
Motor stumbles, coughs, dies for no reason. Motorcycle dies when turning and fall over on my leg causing injury. Harley davidson dealer says cant find problem.
The vehicle's left headlight, left front pegs, seat, left dry box, left side and handle bar were damaged.
Rear brakes. Can place rider in extreme danger it the event of a crash when losing rear brakes due to a hole in the brake line caused by friction against the clutch cable in factory routing of the line and cable.
2006 harley davidson. Consumer writes in regards to incorrect mileage on motorcycle.
Failure results in immediate loss of power which under highway conditions, for example would lead to deceleration, as in passing or merging onto a freeway. Consequently, probability is high that collision will occur resulting in death or severe injury to the rider.
Failure of these mounts (breaking at one or both ends on both left and right side of inner fairing) results in catastrophic vibration causing loss of control. I have just experienced this personally and I can attest that hundreds of others involving several other year models have been reported in online harley…
Inner cam bearing failed on my 2006 harley davidson ultra classic. The motor had to be completely rebuilt including new bearings, oil pump, camshafts. Cam cover and all gaskets.
The contact stated that the lining of the brake pad fell off after it rusted. While driving 4 mph, the front brake lever extended completely down and the contact had to use the rear brakes to stop. The contact took the vehicle to a repair shop and had them replace the shoes immediately after the failure.
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
Comparison
By complaint count this model year ranks 9,288 of 36,659 model years in the NHTSA data (top 25% most complained about).
On average one model year of the Flhtcui has 8 complaints (13 years in the data). This year has 15, above average.
What to check before buying
- Service brakes. Pedal feel, ABS operation, leaks, discs and hoses.
- Engine and cooling. Radiator and fan after a frontal hit, coolant level and condition, overheating.
- Tires. Tire age by DOT code, bulges, wear pattern.
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
Other years of this model
Questions and answers
What are the most common problems with the 2006 Harley-Davidson Flhtcui?
Owner complaints to NHTSA most often mention: service brakes, engine and cooling, tires. Total complaints: 15. The most frequent symptoms in complaint texts: loss of power / limp mode (13%), rust, corrosion (13%), brake failure (7%).
How many service bulletins (TSB) were issued for the 2006 Harley-Davidson Flhtcui?
NHTSA lists 0 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 2006 Harley-Davidson Flhtcui 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 2006 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 2026-11-06.