RoadVitals

2018 Harley-Davidson Flhr Owner Complaints

Reports submitted to NHTSA by owners and drivers, shown in full

Data refreshed

Complaints on fileComplaints are reports submitted to NHTSA by owners and drivers. NHTSA does not verify most reports before publishing them, and a complaint does not establish that a defect exists. Volume is influenced by how many of a vehicle were sold, how long it has been on the road, and how much attention an issue has received.
5
Latest Jul 12, 2026
Crash or fire reportedComplaints whose submitter recorded that a crash or a fire occurred. These are the reporter's own answers on the NHTSA form, not verified findings.
0
Filed in the last 12 monthsReports filed with NHTSA in the trailing 365 days. Recent volume reflects attention and vehicle age as much as anything else.
1
Reports on file since May 24, 2018

What this page shows

Our database holds 5 NHTSA owner-reported complaints for the 2018 Harley-Davidson Flhr. Each one is a report filed by an owner or driver and published by NHTSA without most of them being verified. A complaint is not a confirmed defect, not a recall and not a manufacturer bulletin. Narratives are shown exactly as filed.

Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.

Complaints, most recent first

Showing 1–5 of 5

Engine
Filed Jul 12, 2026

I have oil in my breather which is a result from engine sumping problems, I have had Harley Davidson to check recalls and there were none., the bike has 22853 miles on it. Also Harley Davidson checked maintenance records to see if my oil pump had been replaced, they said it had not. The sumping problems could cause a catastrophic failure and an accident

NHTSA ID
11749847
Incident
Jul 12, 2026
Powertrain (other)
Filed Apr 15, 2022

The contact owns a 2018 Harley-Davidson FLHR Road King. The contact stated that upon start of the motorcycle there was an abnormal grinding sound coming from the motorcycle without warning. The contact had taken the motorcycle to a dealer where he was informed that the gears inside of the transmission were breaking apart and that the transmission needed to be replaced. The dealer was able to order a new transmission and replaced the transmission under warranty; however, despite the repair, the failure returned and the contact returned the motorcycle back to the dealer. The contact had attempted to reach the manufacturer on numerous occasions but was unsuccessful after each attempt. The motorcycle had not been repaired and remained in the possession of the dealer. The failure mileage was approximately 6,100.

NHTSA ID
11460871
Incident
Jan 1, 2022
Mileage
6,100 mi
Powertrain (other)
Filed Jun 18, 2020

THIS IS A DESCRIPTION OF THE DRIVABILITY PROBLEMS CAUSED BY THE EXCESSIVE PRIMARY CASE FLUID. WHILE IN MOTION ON A CITY STREET THE MOTORCYCLE WOULD SOMETIMES NOT SHIFT DOWN FROM 3RD-2ND OR FROM 2ND TO 1ST GEARS. THIS CAUSES PROBLEMS WHEN TURNING AND WANTING TO USE ENGINE BREAKING TO SLOW DOWN DURING THE TURN. I COULD NOT USE THE ENGINE BREAKING AND WOULD HAVE TO USE THE BRAKES QUICKLY AS TO NOT CAUSE AN ACCIDENT. ALSO, WHEN SITTING STILL WITH ENGINE RUNNING IN NEUTRAL AT A TRAFFIC LIGHT, THE TRANSMISSION WOULD SOMETIMES NOT SHIFT FROM NEUTRAL TO 1ST GEAR. THE DELAY IN TRYING TO PROCEED CAUSES OTHER MOTORISTS TO ALMOST RUN INTO THE BACK OF MY MOTORCYCLE. THIS WAS MOST DANGEROUS WHEN TRAVELING IN A GROUP OF MOTORCYCLES RIDING CLOSE TOGETHER. ALSO, DURING AN EMERGENCY STOP CONDITION WHEN TRAVELING ON A CITY STREET ABOUT 50 MPH IN 5TH GEAR, IT IS VERY DIFFICULT GET OUT OF THE WAY FROM CARS OR TRUCKS BEHIND ME. THIS IS BECAUSE YOU MUST BE IN A LOWER GEAR THAN 3RD TO GET OUT OF THE WAY ONCE YOU HAVE COME CLOSE TO STOPPING. MOTORCYCLES CAN STOP MUCH QUICKER THAN CARS OR TRUCKS. IF I CAN'T GET OUT OF THE WAY, I COULD BE INJURED OR KILLED. HARLEY-DAVIDSON TRIED TO FIX THIS ISSUE IN OCT '19. UNDER WARRANTY THEY ADDED A BREATHER KIT PART# 26500027. MY DRIVABILITY ISSUES STARTED ABOUT 6,000 MILES AFTER HARLEY-DAVIDSON SAID IT WAS FIXED. AFTER DRIVING ABOUT 6,000 MILES THE DRIVABILITY PROBLEMS STARTED. AT THAT TIME, I CHANGED THE PRIMARY FLUID AND FOUND 7 EXTRA OUNCES OF OIL. WHEN PUTTING IN THE CORRECT 30 OUNCES OF FLUID THE DRIVABILITY ISSUES STOPPED. SEE ATTACHED TA0022 HARLEY-DAVIDSON KNOWS THE ISSUE. # DEAD? THIS IS FROM PAGE 149 OF MY HARLEY-DAVIDSON OWNER'S MANUAL. NOTICE: DO NOT OVERFILL THE PRIMARY CHAINCASE WITH LUBRICANT. OVERFILLING CAN CAUSE ROUGH CLUTCH ENGAGEMENT, INCOMPLETE DISENGAGEMENT, CLUTCH DRAG AND/OR DIFFICULTY IN FINDING NEUTRAL AT ENGINE IDLE. *TR

NHTSA ID
11329656
Incident
Jun 1, 2020
Mileage
17,000 mi
Powertrain (other)
Filed May 28, 2019

SAME ISSUE WITH 2017-2017 RECALL ON HARLEY CLUTCHES PURCHASED A 2019 ROAD KING BY HARLEY AND THE CLUTCH WILL NOT RELEASE THE GEAR IN 1ST/ BIKE CREEPS FORWARD WHEN CLUTCH HANDLED IS PULLED IN. WONT GO INTO NEUTRAL WITH OUT DOUBLE CLUTCHING THE CLUTCH HANDLE.OUT OF TOWN DEALERSHIP INSPECTED AND FOUND MASTER CYLINDER COVER GASKET SUCKED DOWN AND NOT FLUID. THEY FLUSHED THE CLUTCH SYSTEM AND REFILLED. WORKED FOR TEST DRIVE BUT WHEN I HAD PUT 100 MORE MILES ON THE BIKE ISSUES CAME BACK. THIS BIKE HAD A LITTLE OVER 800 MILES ON IT.

NHTSA ID
11210265
Incident
May 25, 2019
Mileage
800 mi
Engine
Filed May 24, 2018

ENGINE GETS HOT AND STALLS OUT IN TRAFFIC DUE TO ENGINE CASE FILLING WITH OIL, HARLEY CALLS THIS WET SUMPING, HUNDREDS OF BIKE ENGINES ARE BLOWING UP ALL OVER THE WORLD, ITS ALL OVER THE INTERNET, WITH HARLEYS NEW M8 ENGINE, THE BIKE STALLS OUT WITH NO WARNING, IVE HAD CARS AND TRUCKS ALMOST RUN ME OVER.

NHTSA ID
11097743
Incident
Mar 20, 2018
Mileage
100 mi

Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers.

Data sources

Data on this page last refreshed .