Home · 2018 Ram 3500 · Complaints

What 775 owners told NHTSA about the 2018 Ram 3500

These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.

All (775)Crash / fire / injury (16)Brakes (618)Electrical system (134)Speed control (107)Driver assistance (60)Steering (33)Wheels (24)Transmission & drivetrain (23)Service Brakes, Air (21)Engine (15)Suspension (11)

107 of 775 complaints match · Speed control · clear filters · page 5 of 5

Jan 18, 2023SteeringSpeed controlBrakes

1. ABS pump failure, stable tract for steering. Available for inspection if requested. When this warning light comes on cruise control will not function. 2. If ABS failure cannot slow down in a timely manner danger to occupants. 3. Yes 4. Unknown 5. Yes, warning lamps appeared at 15,000 miles. Would like to see this be a recall because numerous other owners have this same issue.

NHTSA ODI 11502430

Dec 12, 2022Electrical systemSpeed controlWheels

ABS Control Module and/or Wheel Speed Sensors is causing the abs warning light and traction control module light to go on and off intermittently for over a year causing the cruise control to not engage or to disengage…

NHTSA ODI 11496982

Apr 28, 2022Electrical systemSpeed controlBrakes

The warning chirp occurred and the ABS and ESC lights came on the first two times. The incident happened so quickly I could not clearly determine which warning lights illuminated. On April 18 with just over 39,000 miles on the vehicle the chirping alarm and the ABS and ESC light illuminated. In addition two warnings appeared in the dash: "Service Antilock Brake System" and "Service Electronic Braking System." The warnings happened multiple times per minute in some cases. Other times the vehicle would go for many miles without the warning. Every time the warning chirp was heard the cruise control would disengage. I did not notice any problems with the brakes of the truck. In researching the issue I learned that many people are having this problem. I contacted Ram and they directed me to a dealer who diagnosed the C0020-01 fault code and that the hydraulic control unit (HCU) for the ABS system was defective. According the the TSB Ram has put out about the issue the ABS module could also be bad, but the first part of the repair it to replace the HCU and if the problem persists to then replace the ABS module. Ram apparently has an inconsistent level of support for owners experiencing this malfunction with some getting the repair done out of warranty, while others have to pay for the repair. Because it is brake related it seems this should be an item replaced as a safety issue, no matter what the mileage on the vehicle.

NHTSA ODI 11462539

Sep 19, 2021Electrical systemSpeed controlBrakes

The abs system has failed on my truck and many more possibly by a dealer defect and no recall as of now. When the abs warning light comes on it also puts up a warning light for the electronic braking system and you aren’t allowed after that to set the cruise. Anytime you hit a bump or turn the wheels or just randomly at any given time the lights come up on the dash and it chimes which will drive anyone nuts. With the electronic braking system not functioning properly could potentially lock the brakes up on the truck in my opinion knowing how it functions. Which in my opinion is a safety hazard. Also I might add that taking my vehicle to my local dealership is a complete waste of time as the diesel mechanic up there is terrible at his job. He has misdiagnosed two of my trucks and I believe he had something to do with a transmission going out in one. He “fixed” it then 3000 miles later the transmission completely destroyed itself which made me have to trade the truck in. Also the traction control system does not function when the abs light is on. In doing research I have found many many people with this same problem.

NHTSA ODI 11433540

Jun 24, 2020Speed control

CRUISE CONTROL INTERMITTENT FUNCTION...MAY NOT TURN ON, MAY NOT TURN OFF, MAY NOT DISCONNECT OR CANCEL AT SPEED, MAY NOT CANCEL AT SPEED WITH BRAKE PEDAL. BOUGHT THE TRUCK IN MARCH, 2020. NO PROBLEMS UNTIL JUNE 12, 2020, WHEN IT FAILED TO WORK CONSISTENTLY. DEALER WANTS $150 TO DIAGNOSE, EVEN THOUGH IT WAS REPORTED TO FCA IN MAY OF 2018. WEB INFORMATION SHOWS WIDESPREAD PROBLEMS...2 LINKS I FOUND: HTTPS://WWW.EQUIPMENTWORLD.COM/RAM-TRUCKS-CAUGHT-UP-IN-LARGE-FCA-RECALL-OVER-DEFECTIVE-CRUISE-CONTROL/ HTTPS://WWW.RAMFORUM.COM/THREADS/CRUISE-CONTROL-STOPPED-WORKING.66362/ I BOUGHT THE TRUCK WITH 50K MILES, NOW HAS 53K MILES. *TR

NHTSA ODI 11330566

Mar 29, 2019Speed control

CRUISE CONTROL FAILED TO DISCONNECT. UPON REPEATED ATTEMPTS TO DISENGAGE THE CRUISE CONTROL UNIT, THE SPEED INCREASED INCREMENTALLY WITH EACH ATTEMPT. HOLDING THE CANCEL BUTTON CAUSED THE UNIT TO APPEAR TO DISENGAGE, BUT RELEASING THE CANCEL BUTTON CAUSED THE UNIT TO REENGAGE AND ACCELERATE. NOW, UNIT IS INOPERATIVE.

NHTSA ODI 11192380

Feb 4, 2019SteeringSuspensionSpeed control

FRONT STEERING ARM COUPLERS CAME LOOSE

NHTSA ODI 11173919

← Newer

Working with the data? Download all 775 complaints as CSV · fetched from NHTSA July 11, 2026

How to use these: a complaint is one owner’s report, filed voluntarily and published unverified. Patterns matter more than any single story. If several owners describe the same failure at similar mileage, put that system at the top of your pre-purchase inspection list. Back to the full 2018 Ram 3500 verdict →