Skip to content
EnginePart report

2010 Harley-Davidson Flhx Engine Problems

Complaints
4about this part
Share
17%of 24 total for the year
Median mileage
35,000miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 4 complaints about the engine of the 2010 Harley-Davidson Flhx, 17% of the 24 complaints for this model year. Where a mileage was given, the median is 35,000 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.

“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. Harley davidson has not listed it as a recall.”

NHTSA complaint #10606438, filed 2014-06, 40,000 miles

“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. After doing some research, harley davidson is aware of the problem but will not fix it if not under warranty. If this had happened while passing, in a corner or in a center lane on a freeway, this could have resulted in a crash.”

NHTSA complaint #10631587, filed 2014-09, 43,200 miles

“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. An unknown dealer replaced the part twice. The manufacturer was notified of the failure and suggested that the dealer replace the part. The VIN was unknown. The approximate failure mileage was 30,000.”

NHTSA complaint #11122932, filed 2018-08, 30,000 miles

“The contact owns a 2010 harley davidson FLHX. The contact stated that the motorcycle stalled while driving 55 MPH. The contact was able to restart the vehicle several times, but the failure continued. The dealer located the failure at the throttle wire sensor, which resulted in a loss of fuel circulation. The vehicle was repaired. The throttle body assembly was replaced. The manufacturer took a complaint. The failure and current mileages were 4,300 updated 06/05/12”

NHTSA complaint #10456421, filed 2012-04, 4,300 miles

Related service bulletins

Engine: other model years

YearComplaintsShare of year
2018113%
2017120%
2013117%
201216%
201116%
2010417%
200927%
2008413%
200715%

Other parts of the 2010 Harley-Davidson Flhx

Brakes
12 complaints
Electrical system
6 complaints
Vehicle speed control
4 complaints
Fuel system
3 complaints
Exterior lighting
1 complaints
Steering
1 complaints
Transmission and drivetrain
1 complaints
Wheels
1 complaints

← All problems reported for the 2010 Harley-Davidson Flhx

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