AI Damage2010 Harley-Davidson Flhx: common problems
Owners of the 2010 Harley-Davidson Flhx filed 24 complaints with NHTSA, most often about service brakes and electrical system. Details by component below, with sources.
Key figures
- Owner complaints
- 24
What fails most often
- 1 Service brakes 50% of all complaints
- 2 Electrical system 25% of all complaints
- 3 Engine 17% of all complaints
- 4 Vehicle speed control 17% of all complaints
- 5 Fuel/propulsion system 8% of all complaints
- 6 Exterior lighting 4% of all complaints
- 7 Fuel system 4% of all complaints
- 8 Powertrain 4% of all complaints
- Service brakes: 12 complaints (50% of all).
- Electrical system: 6 complaints (25% of all).
- Engine: 4 complaints (17% of all).
- Vehicle speed control: 4 complaints (17% of all).
- Fuel/propulsion system: 2 complaints (8% of all).
Symptoms owners describe
How many of the 24 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 | 12 | 0 | 0 |
| Electrical system | 6 | 0 | 0 |
| Engine | 4 | 0 | 0 |
| Vehicle speed control | 4 | 0 | 0 |
| Fuel/propulsion system | 2 | 0 | 0 |
| Exterior lighting | 1 | 0 | 0 |
| Fuel system | 1 | 0 | 0 |
| Powertrain | 1 | 0 | 0 |
| Steering | 1 | 0 | 0 |
| Wheels | 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.
This causes the motorcycle to lose throttle and go into limp mode causing me to very closely come to getting run over on the highway. It happened multiple times on the highway, turning. And on city streets.
The contact stated that the rear brakes failed to operate. The contact stated that the front brakes was engaged to get the motorcycle to come to a complete stop. The vehicle was not taken to a dealer or independent mechanic for a diagnostic test or repairs. The manufacturer was made aware of the failure.
Tl* the contact owns a 2010 harley-davidson flhx. The contact stated that the throttle control actuator/induction module fractured internally on two occasions. The contact stated that the component was not structurally sound. In addition, while making a left turn, the part failed again and had to be replaced.
Unfortunately due to type of brake fluid used the problem has caused the abs hydraulic control unit (hcu) to fail and lock up resulting in loss of brakes front or back or both. This results in loss of stopping ability and safe operation.
The system should never cause a loss of braking. The system should revert to non abs braking when a failure happens. When my rear brakes failed , luckily for me , I was moving at a slow speed on a side street and was able to stop with the front brakes only.
While riding on highway, engine went to idle and check engine light came on. Had to pull off on shoulder and shut the bike off. After restarting, bike would run fine for approx. 20 miles and it would happen again. Happened four times on 9/6/14.
I was driving down the road going about 50 mph and my throttle shut off and the engine went into "limp mode" (shut off one cylinder). I had to cross one lane to pull off the side of the road so I could restart my bike. Luckily there wasn't heavy traffic or it could have been really bad.
Engine lost all power. Had to cycle the ignition 3 times to reset. Diagnosis was a bad throttle body module. Dealer said it is a known issue and is happening faster than they can get the parts in to fix. Bike currently has been at dealer for 3 weeks and parts are still on back order.
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 7,585 of 36,656 model years in the NHTSA data (top 21% most complained about).
On average one model year of the Flhx has 9 complaints (20 years in the data). This year has 24, above average.
What to check before buying
- Service brakes. Pedal feel, ABS operation, leaks, discs and hoses.
- 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.
- Vehicle speed control. Accelerator pedal, cruise control, throttle codes.
Other years of this model
- Flhx 200720 sources
- Flhx 200830 sources
- Flhx 200929 sources
- Flhx 201118 sources
- Flhx 201216 sources
- Flhx 20136 sources
- Flhx 20148 sources
- Flhx 20153 sources
- Flhx 201651 sources
- Flhx 201779 sources
- Flhx 201876 sources
- Flhx 201966 sources
- Flhx 202079 sources
- Flhx 202164 sources
- Flhx 202256 sources
- Flhx 202351 sources
- Flhx 202489 sources
- Flhx 202538 sources
- Flhx 202619 sources
Questions and answers
What are the most common problems with the 2010 Harley-Davidson Flhx?
Owner complaints to NHTSA most often mention: service brakes, electrical system, engine. Total complaints: 24. The most frequent symptoms in complaint texts: brake failure (17%), loss of power / limp mode (8%), vibration (8%).
How many service bulletins (TSB) were issued for the 2010 Harley-Davidson Flhx?
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 2010 Harley-Davidson Flhx 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 2010 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 2026-11-05.