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Fuel systemPart report

2021 Ram 3500 Fuel system Problems

Complaints
5about this part
Share
8%of 62 total for the year
Median mileage
38,535miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 5 complaints about the fuel system of the 2021 Ram 3500, 8% of the 62 complaints for this model year. Where a mileage was given, the median is 38,535 miles.

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.

“My brand new 2021 Ram 3500 limited longhorn, suddenly stopped running at around 70 miles. This happened on I-84 between caldwell, id and baker city, or on 19 jan 2021 around 9:00pm. Roadside failed twice at getting us towed to safety. The 1st towing company called to say he declined the service and was surprised that they booked him anyway. The 2nd one informed us they had to decline the service because roadside assistance would not pay a fair price. By then we, the truck, and our trailer waited on the interstate for 4 hours in pitch dark and very cold weather. …”

NHTSA complaint #11389489, filed 2021-01, 70 miles

“I took the vehicle to the dealer for recall Manufacturer Recall Number13A NHTSA Recall Number23V-060 The dealer told me that they can only order one per week. I will have to wait over a year for the part to come in. This is a fire hazard and I have been advised to not park the vehicle in the garage or near other vehicles. Waiting over a year for a fire hazard repair is not acceptable.”

NHTSA complaint #11533101, filed 2023-07

“I’ve replaced turbo twice, computer once, now I’ve been told by multiple dealerships that I need to replace the def system and or fuel pump I hadn’t even got a 100k on the truck yet. The last incident I was driving and it kept saying in so many miles it would only allow me to go 5 mph see dealership for service then the numbers kept changing from high to low I was able to make it over 200 miles to get the truck back to the dealership without any issues.”

NHTSA complaint #11492443, filed 2022-11

“The contact owns a 2021 RAM 3500. The contact stated that while driving at 40 mph, the vehicle stalled and could not be restarted. The vehicle was towed to a dealer, where it was diagnosed that the entire fuel system needed to be replaced due to the high-pressure fuel pump exploding after metal shavings were found throughout the entire system. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 77,000.”

NHTSA complaint #11735999, filed 2026-05, 77,000 miles

“Brand new truck (226 miles) STOPPED RUNNING on Interstate 90 in Montana. Very dangerous situation, although was able to pull to side of interstate and was able to tow truck to Butte Montana and no one was injured. Nonetheless, had this occurred in rural area, snowy mountain passes, pulling livestock trailer etc (purpose for which truck is intended), could have easily been life threatening. Understand this may be the same fuel pump issue affecting many others. Should be recalled immediately. No warning, truck just went from 75 mph to zero in very rapid fashion. …”

NHTSA complaint #11437405, filed 2021-10

Related service bulletins

Fuel system: other model years

YearComplaintsShare of year
202512%
202437%
202316%
2022147%
202158%
20205749%
20195037%
201871%
201793%
201675%
201564%
20142211%
20132017%
2007117%

Other parts of the 2021 Ram 3500

Electrical system
17 complaints
Transmission and drivetrain
11 complaints
Engine
10 complaints
Other or unknown
9 complaints
Wheels
7 complaints
Brakes
6 complaints
Body and structure
5 complaints
Back-over prevention (rear camera)
3 complaints
Engine cooling
3 complaints
Exterior lighting
3 complaints
Tires
3 complaints
Suspension
2 complaints

← All problems reported for the 2021 Ram 3500

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 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