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Fuel systemPart report

2008 Harley-Davidson Flhx Fuel system Problems

Complaints
4about this part
Share
13%of 30 total for the year
Median mileage
10,000miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 4 complaints about the fuel system of the 2008 Harley-Davidson Flhx, 13% of the 30 complaints for this model year. Where a mileage was given, the median is 10,000 miles. 1 recall campaign on record is filed under a similar system.

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.

“I was in a roundabout when I tried to increase my speed but no response. The bike would still run so I limped home. Ever sance it has set two codes thay are p1510 and p2138 went to local deler he told me I would half to install a race tuner I didnot install a race tuner . Thay also told me to live with it”

NHTSA complaint #10767595, filed 2015-09, 10,000 miles

“Fly by wire throttle on touring and cruiser harley-davidsons begins to rev / race without even turning the handle. Happens quite frequently once it begins. Particularly hazardous during turns and starting out in traffic. Has occurred on my motorcycle about 15 times in the past week. 3 times it almost caused me to crash in a turn. Called local hd dealer and they came to pickup motorcycle 5/25/10 to service. Service manager says they have been having problems with this throttle system.”

NHTSA complaint #10332236, filed 2010-05, 24,000 miles

“The contact owns a 2008 harley davidson FLHX. The contact received a recall notice for NHTSA campaign id number 08v357000 (fuel system, gasoline:storage:tank assembly:filler pipe and cap) in july of 2008. He called the dealer on august 4,2008 to have the recall repair performed on the vehicle. A technician stated that the parts were unavailable for the recall and they would call him when they arrived. The technician never called back. The contact took the vehicle to another dealer and did not receive a response. The vehicle has yet to be properly repaired according to the recall. …”

NHTSA complaint #10240947, filed 2008-09, 8,030 miles

Related recalls

Related service bulletins

Fuel system: other model years

YearComplaintsShare of year
2010313%
2009621%
2008413%
200715%

Other parts of the 2008 Harley-Davidson Flhx

Brakes
9 complaints
Electrical system
6 complaints
Vehicle speed control
5 complaints
Engine
4 complaints
Transmission and drivetrain
4 complaints
Other or unknown
2 complaints
Wheels
2 complaints
Electronic stability control
1 complaints
Exterior lighting
1 complaints
Seats
1 complaints
Steering
1 complaints
Body and structure
1 complaints

← All problems reported for the 2008 Harley-Davidson Flhx

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 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