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Fuel system

2021 Ram Promaster Fuel System problems

Owners have filed 5 complaints about the 2021 Ram Promaster's fuel system with NHTSA - 5% of all its complaints, most recently on October 9, 2026. Fuel pumps, leaks, injectors, fuel smells, gauges and stalling caused by fuel delivery.

Complaints
5
Recalls
0
Crashes
0
Fires
0
Injuries
0
Deaths
0

Fuel System complaints

Fuel system

We have a 2021 Ram Promaster 1500 Winnebago Pocket Solis. We smelled gasoline while loading up gear for a trip. Upon inspection we saw that gasoline was leaking at the seal of the gas tank. We have taken it to the local Ram dealership that confirmed it is leaking at the cold weld of the gasoline tank. Unfortunately, it is all one piece and the whole tank has to be replaced. $2,400 It is very expensive to replace the whole tank. Our van has only 48k miles on it. It is ridiculous that the tank failed so...

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quickly. This is a know facorty defect in the gasoline tanks and it should be warrantied from Ram or recalled with a better design. This failed gasoline tank poses a huge safety concern not only due to fire but also leaking gas vapors into the environment. It should be covered under the Federal Emmisions Waranty. Some states like FL. don't honor that because we don't have emissions programs. We contacted Ram warranty support several times and we were told it was going to be fully covered. When the dealer contacted Ram warranty they deny the liability coverage. We got the run around from Ram. This is so aggravating that Ram is being so negligent about a know significant safety concern and obvious potential fire hazard. This is a bad design of a plastic gasoline tank that eventually will leak at the molded cold weld due to expansion and contraction gas vapors. This whole situation has been a hassle and fight with Ram. We are very disatisfied with the Ram Warranty dept. They basically told us that "sorry you were given wrong information". Not 1x but 2x from agents in the warranty dept. at Ram. So apparently they just lie to owners. Hopefully something is done about this so no one gets hurt or their van catches fire!

Filed Incident Fuel / propulsion systemNHTSA 11770121
Fuel system

The fuel tank is leaking where the fuel tube goes into the tank. The seal starts to leak and they do not make a replacement seal, you have to replace the entire fuel tank. This is the 2nd Promaster van that I have had and the 2nd time this has happened. This is dangerous to have fuel leaking from the front of the vehicle. This is a poor design, it's a very common problem with these vehicles that still hasn't been addressed. It's also an expensive problem because the tank costs $1300 without labor, and you just can't buy the gasket itself you have to buy the whole tank.

Filed Incident Fuel / propulsion systemNHTSA 11762540
Fuel system

fuel tank leaking gasoline. vapors and liquid gasoline leaking from fuel tank

Filed Incident Fuel / propulsion systemNHTSA 11756268
Fuel systemEquipment & accessoriesElectrical system

I had NHTSA recall for this generator done (23E-030) which was to solve the same problem I just had. Apparently, they just moved to a smaller diameter fuel line to fit the fuel pump better. However, this hose also came off my Cummins generator fuel pump and was spewing gas all over the generator and the ground when we ran it. This is a very unsafe condition and I'm surprised, after the recall was performed by a certified Cummins dealer (verified by Cummins) that this "new" fuel line has also come off the fuel pump.

Filed Incident Fuel system, other · Equipment · Electrical systemNHTSA 11740172
Fuel system

This vehicle is a new Thor motorcoach model 18m with onboard propane system. Within the first 2 weeks of ownership i turned on the propane and immediately a rubber propane hose burst at a bend and started leaking propane. I was able to shut off the supply at the tank and get it in for repair where they replaced the hose. On December 3rd we drove the van 9 hours to Disney and parked for check in. upon return from check in I smelled propane and heard hissing under the van again. The fire department was called to the...

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scene and they found the main fitting on the inlet of the tank leaking. It bled about 3/8 of the propane before they secured it enough that I was able to get it home. I took it to the dealer again for repair yesterday and they made a repair. I left the dealer with 1/4 tank of propane. This morning there was a very strong smell of propane again and my tank is empty. I have notified them again and am waiting....... I am unaware of where it is leaking from now, but I have lost all faith in the safety of this propane system and thor motorcoach quality control.

Filed Incident Fuel / propulsion systemNHTSA 11499663

Ram Promaster fuel system complaints by year

Promaster fuel system problems, every year

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Source: U.S. National Highway Traffic Safety Administration (NHTSA) complaints and recalls, checked . Complaints are owners' own reports and are not verified. How we use the data

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