NHTSA Complaint #11678915 — 2021 RAM 3500

ENGINE issue reported to NHTSA

Check any vehicle history by VIN - Free vehicle history report

Complaint Details

ODI Number	11678915
Vehicle	2021 RAM 3500
Component	ENGINE
Date of Incident	June 17, 2025
Date Filed	August 6, 2025
Mileage	N/A miles
Crash	No
Fire	No
Injuries	0
Deaths	0
Vehicle Towed	No
State	CA

Consumer Description

Failure of hydraulic lifters and camshaft in Cummins 6.7 liter diesel engine of 2021 RAM 3500. Engine exhibited significant ticking noise and the engine does not work properly, putting the safety of driver and passengers in vehicle at risk. Vehicle is not driveable. This issue has been confirmed by the RAM dealership in Livingston, Montana. The 2021 RAM 3500 truck has been sitting at the RAM dealership for the past seven weeks awaiting parts and a fix that RAM trucks is still trying to figure out. Apparently, this has become a common problem with the RAM Cummins 6.7 liter diesels from model years 2019 through current 2025 models, including 2021. The RAM dealership in Livingston, Montana has five separate RAM Cummins 6.7 liter diesel trucks with the same issue awaiting parts and a fix from RAM.

Related Complaints for the 2021 RAM 3500

Other ENGINE Complaints

#11700252 — November 19, 2025 — While driving my truck I noticed my mpg gauge was showing 0 mpg. Then I realized my "miles to go" gauge was reading "...

#11697674 — November 5, 2025 — The contact filed the complaint on behalf of the customer, who was the owner of a 2021 Ram 3500. The contact stated t...

#11679340 — August 8, 2025 — Vehicle died in a busy intersection coming off the freeway. Light flashed that indicated it was an issue with the ele...

#11632310 — December 25, 2024 — Hydraulic roller lifter failure.

#11588657 — May 14, 2024 — There exist a defect which is common through multiple years with RAM that have the Cummins 6.7L diesel engine. The ...

Recent Complaints for the 2021 RAM 3500

#11713842 — SERVICE BRAKES — January 28, 2026 — Brake system is not functioning as designed. Rear axle braking is not being fully applied and is most noticeable and ...

#11708936 — EXTERIOR LIGHTING:BRAKE LIGHTS — January 5, 2026 — Both front ball joints wore out at 20,000 miles The 3rd break light leaks into the cab at 26,000 miles & won't be wa...

#11708936 — SUSPENSION — January 5, 2026 — Both front ball joints wore out at 20,000 miles The 3rd break light leaks into the cab at 26,000 miles & won't be wa...

#11708936 — UNKNOWN OR OTHER — January 5, 2026 — Both front ball joints wore out at 20,000 miles The 3rd break light leaks into the cab at 26,000 miles & won't be wa...

#11705984 — TIRES — December 18, 2025 — I have had two tires separate in the past couple of months with less than 24000 miles and 5 years old. I filed a com...