2021 Ram 1500 Electrical System Problems

The contact owns a 2021 Ram 1500. The contact stated that while driving at an undisclosed speed, the check air bag warning light illuminated. The contact stated that the vehicle had a history of wiring failures and that the air bag wiring harness had been replaced three times; however, the failure persisted. The vehicle was taken to a dealer, where it was diagnosed with electrical wiring failure, and the wires were zip-tied in place. The vehicle was repaired, but the failure persisted. The manufacturer was not notified of the failure. The failure mileage was 70,000.

Electrical system shutdown including loss of all safety features (blind spot, emergency braking, abs, traction control, towing), climate control options (AC, Heat, window operations) and user interfaces (U-Connect screen, center gauge cluster). Initial warnings (2) on center cluster on listed- 1. Blind Spot Detection Disabled 2. 115 Volt Cargo Power Outlet On All electronics, controls were then disabled- black screens, inoperable controls. Passenger rear windows, sliding back glass, panoramic sunroof and drivers side mirror are the only working electronics other than speedometer. Upon inspection of all fuses, relays, battery, alternator, and checking all accessible wiring related to blind spot and auxiliary power and finding no defective issues, web searches were performed. Based on numerous other RAM owners on multiple forums on RAM trucks 2020 and newer with blind spot avoidance, we found a likely culprit in the driver's side brake light. Upon inspection of the left rear brake light assembly, a small hairline crack was located with signs of internal moisture/ condensation. After observing the internal moisture the drivers side rear brake housing was removed and disconnected for closer inspection and potential repair. While the driver side brake light assembly was removed, an instance occurred when my wife needed the vehicle. Upon and during the entirety of operation over the next 1.5 hrs driving approximately 63 miles, all electrical options worked as intended minus the blind spot avoidance and a new warning on brake lamps (obvious as tail light had been removed). During this time, the proximity sensor housing was removed from the assembly, water accumulation dried, and allowed to remain open next to a dehumidifier for 4 hours. Epoxy was applied over the hairline Crack, and any area that looked as if could be affected. Unit was reinstalled, however all electronic failure returned. Unit removed again to attempt humidity removal- all electronics res

Our alternator is bad in a 2021 Ram. There are 10,000 on back order and up to a 9 -12 month wait list. There is obviously something wrong with this brand and should be recalled.

The rear running lights go out due to a short in the wire harness from the computer module to the tail lights. The short causes the lights to either flicker or go totally out.

The contact owns a 2021 Ram 1500. The contact stated that while driving at an undisclosed speed, the contact noticed an unusual popping sound. The low battery and check engine warning lights were illuminated. In addition, the battery lost power. The vehicle was driven to the shoulder of the road, and the vehicle was turned off. The contact stated that while attempting to restart the vehicle, the vehicle failed to restart. The vehicle was towed to the residence. The vehicle was not diagnosed or repaired by an independent mechanic or the dealer. The dealer was made aware of the failure. The contact was informed that the failure was a known failure with the vehicle. The manufacturer was made aware of the failure, and a case was filed. The failure mileage was approximately 78,900.

Every time my truck sits for more than 3 days even in the summer the battery dies. I have to jump this truck more than I jumped anything in life. It has less than 30000 miles on it and I’ve had nothing but trouble with the battery staying charged and the air bag system being jimmied to keep the sensor from not going of by the dealer.

I bought this truck used from a dealer in 2022. From the start the resting voltage of the car was a problem getting 12.7v and when I was driving it would often only get up to 13.4v. I took it to the dealer and they replaced it completely in 2023. It still shows low resting voltage and driving voltage. I told them and they said it was fine and not to worry. Now for the past 6 months it has been making a whirring sound that gets louder as I accelerate. I took it back to them and they said they didn't hear anything wrong, which is an outright lie. It still hasn't gotten better so I took it to a different mechanic and they said its a bad alternator and that they are very expensive and on back order. I tried setting up an appointment with the dealer to look at it again and they said I am now out of warranty and will charge me a diagnostic fee and if it is the alternator it again isn't covered by the warranty. I have been searching online and this is something thousands of other customers have been experiencing and there is a class action lawsuit about this as well. I am kindly asking that you look into this and if appropriate issue a recall for this. I shouldn't have to pay thousands of dollars to fix an alternator for a truck that only has 60k miles on it. My truck is only worth $29k so having to pay for a repair that is about 7% of my vehicle value is ridiculous.

I am submitting this complaint to report a significant and unusual mechanical failure involving my 2021 Ram truck. The vehicle experienced a failure of the heater core assembly, which resulted in engine coolant leaking directly into the passenger compartment. This failure caused coolant odor and fluid intrusion inside the cabin and required extensive disassembly of the dashboard and HVAC system to repair. The total cost of repairs exceeded $5,300, which I believe is disproportionate and unexpected for a vehicle of this age and mileage. Two separate repair visits were required as it was found after the heater core was replaced the actuator on the driver’s side was damaged by the ongoing leak and required repair. The vehicle has been properly maintained and serviced according to manufacturer recommendations. While this incident did not result in an immediate crash or injury, the nature of the failure raises safety and health concerns, including: •Driver distraction due to coolant fumes and loss of defrost capability •Exposure of occupants to engine coolant within the enclosed passenger compartment •Sudden loss of cabin heating and windshield defogging capability in cold weather Given the age of the vehicle and the severity of the failure, this does not appear to be normal wear and tear. I am concerned that this may represent a design, material, or manufacturing defect that could affect other vehicles of the same model year. The odor was present for many months prior to the failure; however, the local dealership could not examine the issue at the time of a prior oil change due to lack of time on that visit. I am submitting this report to document the issue, assist in identifying potential patterns, and ensure appropriate review by the manufacturer and regulatory authorities. Repair invoices and supporting documentation are included.

All warning lights on dash came on including battery. Freedom Dodge assessed it on 11-10-2025 and said the vehicle generator has an internal short and is discharging the battery. If being operated could cause the vehicle to die while in motion. I am making $700 per month payments and Freedom indicated over 6000 of these units are on back order and cannot give me a date for replacement only saying "months"

Body Control Module failure. 2021 Ram 1500 Tradesman with 3.6L engine My first symptom was a message that appeared on the dash gauge cluster that said something like "problem with shift positioner". That message came up then went away. Next symptom was dash lights flashing for no reason. This was a few days after the other. These lights would flash one time for just a fraction of a second, and only when I hit a bump on the road. I thought that I had a loose wire so I checked wiring for loose connection but did not find any. I had no other problems for several days. Then I was on a trip far from home and that is when things got really bad. All of the gauges on my instrument cluster were going up and down for no reason. The windshield wipers came on by themselves. The dash lights started flashing, like before but this time that were on and off for longer periods of time and not caused by bumps on the road. The vehicle lost power while I was driving and I was forced to pull to the side of the road. The engine had died. I was not able to restart right away. While I was sitting there trying to figure out my next move (because I was in the middle of nowhere), the lights on the dash were still flashing even after I had turned the key off. I know that sometimes trouble codes can be cleared by disconnecting the battery, so that is what I did. After I put the battery cables back on, the controls seamed normal again. I was able to start the engine and drive into town. I went straight to an automotive repair shop that I had found by Google search. They put their code reader on and said that I had 59 fault codes. They had never seen that many on any vehicle before. They checked my battery to make sure it was fully charged. It was. They checked a few other things, but diagnosed the problem to a bad Body Control Module. After this incident, I did some research and found that this seems to be a come problem with the Ram Pickups. This should be a recall item.

Vehicles headunit no longer functions, backup camera system is also in-operational. Due to apparent over the air (OTA) updates to the uconnect infotainment headunit there is a widespread and known issue of, during the automated firmware update process, the vehicles battery being drained completely. This causes the vehicle to lose all power and the head unit to then fail the update process which creates a failure state for the headunit. In this particular case the headunit is "bricked" prescribled troubleshooting steps have been attempted but screen only displays: ("Software Update Update failed. Please re-insert USB Device.") according to a dealership service technician needs to be replaced. But there are none available for order. 2021 Ram 1500 BH UC 4 8.4" w/o nav.

eTorque MGU hybrid motor going out with unexpected loss of power and stopping. Upon failure vehicle lost power and became inoperable. Both independent service center and dealer service center confirmed the eTorque MGU hybrid motor is failing. Upon further research thousands of these MGU hybrid motors are failing unexpectedly. No remedy in sight and manufacturer indicates no eta on availability of parts to fix.

The alternator has went bad on my 5.7 V8 E-torque motor and the alternator is on back order from Dodge and no dealers are able to tell the owners when the part will be available. My truck has been down for a week with no end sight. I have reached out to Dodge on several occasions and then placed on hold only to have my phone calls redirected to an State of Indiana Dodge dealer.

While driving the vehice on 9/23/25, it randomly turned off while driving down my street. Took a while to get it started again, then once it was started, it would not turn off. I brought the vehicle to a local shop. There were NO warning lights.The next day they let me know that the issue was from a faulty sliding backlite, there were cracks on the frame by the back windows that caused water to leak down around the window into a control module that was filled with water that caused the vehicle to randomly turn off while driving down the street then later caused it to not be able to turn off. If this issue caused the vehicle to turn off while on a highway or a curvy road it would have almost definitely ended with a severe accident. I got in touch with stellantis and they know about the issue but aren't willing to help in any way.

The contact owns a 2021 Ram 1500. The contact stated that an Over-the-Air update was been performed on the vehicle overnight and the following day the battery was drained and needed to be replaced. The contact drove another vehicle to an independent mechanic and purchased a new battery. After replacing the battery, an error code for a firmware failure was displayed on the instrument panel. As a result of the message, the radio module became defective, and the back over prevention system failed to operate as needed. The vehicle was taken to a dealer who was unable to diagnose or repair the vehicle. The manufacturer was notified of the failure and referred the contact to the dealer for assistance. The vehicle was not yet repaired. The failure mileage was approximately 50,000.

1. The Motor Generator Unit (MGU) failed on my 2021 Ram 1500. The component is still installed in the vehicle and is available for inspection upon request. 2. The MGU failure caused a loud whining noise that worsened over two weeks, raising concern that the part could seize or fail while driving. A sudden failure could result in loss of vehicle power or drivability, creating a dangerous situation for me and others on the road. 3. Yes. A certified Ram dealership inspected my vehicle and officially diagnosed the MGU as defective. 4. Yes, the dealership confirmed the failure. To my knowledge, it has not been inspected by the manufacturer, police, or insurance representatives. 5. There were no warning lamps or dashboard messages. The only symptom was a whining noise that started faintly and gradually increased over the course of approximately two weeks before the dealer diagnosis.

My etorque motor starting making a really loud noise. So I took it in to have it looked. Technician said the etorque motor was going. Ordered a new one but said it was on back order. My truck then died and the part still does not have a ship date.

2021 Ram 1500 Longhorn Anniversary addition vin: [XXX] Navigation/console Display flashes “115V Cargo outlet on”, the front windows don’t work, main display off/dark, heater turns on, A/C doesn’t work, seatbelt alarm doesn’t work. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

2021 Ram 5.7 etorque MGU bad and vehicle sitting as part appears to be on nationwide back order. vehicle sitting while still making payments and paying insurance. seems to be major issue and no recall yet.

Driving to work and my truck lost all electrical power. All display lights turned on and hazard light signal started blinking but the hazard lights were not actually on. I then lost all electrical power; power steering, hazard lights would not turn on, all dash lights and display lights, head lights at first and then the battery died a couple minutes after that started. I could not put the truck into neutral so I could push it to the shoulder of the highway. I had to put it in Neutral manually with the pull tab under the steering wheel. My Ram 1500 5.7L hemi etorque was towed to Andy Mohr Chrysler Jeep Ram. The service shop told me that the motor generator unit is on back order and it could take a month or 2 months for the part to come in.