RoadVitals

2020 RAM 4500 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.
4
+1 complaint in 30 days
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.
2
Reports on file since Oct 22, 2021

What this page shows

Our database holds 4 NHTSA owner-reported complaints for the 2020 RAM 4500. 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 1–4 of 4

Filed Sep 11, 2026

We purchased this vehicle as a cab and chassis and took it to a professional outfitter to have a service Knapheide box added. The box was equipped with incorporated locks. We had an issue with a check engine light and took the vehicle to the dealership since it was still with in warranty. The dealer scanned the truck and stated that there is a P1400 code showing illegal tuning and would void the warranty. Come to find out this code was due to the outfitter installing the box and flashing the computer for the locks. This should not be an issue that voids a warranty when a professional outfitter installs the box directly from the dealer.

NHTSA ID
11763662
Incident
Aug 20, 2026
Visibility
Filed Oct 3, 2025

The contact owns a 2020 Ram 4500. The contact stated that while driving approximately 65 MPH during a rainstorm, the windshield wipers were activated; however, the windshield wipers failed to engage as needed. The contact attempted to activate the windshield wipers several times, but the windshield wipers stopped operating. The contact pulled over and waited out the rainstorm. The rain had not stopped, and the contact drove to a filling station, checked the electrical fuse for the windshield wipers, and then replaced the fuse. The contact stated that the wipers started to function, but only at the highest speed. The contact attempted to slow the windshield wipers, but when the wiper speed control was set to a slower speed, the wiper blades stopped working in the middle of the windshield. The contact drove to the residence with the windshield wipers functioning at high speed. The contact had taken the vehicle to a local dealer but had not yet received a diagnostic report. The vehicle was not repaired. The manufacturer was informed of the failure and referred the contact to the NHTSA Hotline to report the failure. The contact researched online and related the failure to NHTSA Campaign Number: 22V035000 (Visibility); however, the VIN was not included. The failure mileage was approximately 50,000.

NHTSA ID
11691170
Incident
Sep 22, 2025
Mileage
50,000 mi
Fuel systemVisibility
Filed Jun 1, 2022

The contact owns a 2020 Ram 4500. The contact received notification of NHTSA Campaign Number: 21V880000 (Fuel System, Diesel) and 22V035000 (Visibility) however, the parts to do the recall repairs were not yet available. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repairs. The manufacturer was made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect.

NHTSA ID
11466951
Incident
Nov 12, 2021
Fuel system
Filed Oct 22, 2021

Truck turned off while driving and died. Would not turn back on. Was towing a 40ft gooseneck trailer with a load on it. Truck was stopped blocking multiple lanes of traffic. Truck and trailer had to be towed to nearest dealership where they found the CP4 fuel pump had failed and the entire fuel system needed to be replaced.

NHTSA ID
11437842
Incident
Nov 11, 2020

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 .