The 2020 model year was the second year of the redesigned DT-generation Ram 1500, which launched for 2019. By 2020 most of the launch bugs were sorted, but a few patterns held over. Owner complaint databases and NHTSA filings point to a clear top five. Below we rank the leading 2020 Ram 1500 problems by typical onset mileage so you know what to expect and when.
📊 The most-reported problems, ranked by mileage
This table maps each common 2020 Ram 1500 problem to its typical onset mileage, real-world repair cost, and whether it should make you walk away from a used purchase.
| Problem | Typical Onset | Repair Cost | Dealbreaker? |
|---|---|---|---|
| eTorque 48V battery / BSG failure | 40k - 80k mi | $1,800 - $3,500 | Yes |
| Electrical / UConnect reboots | 5k - 30k mi | $0 - $1,400 | No |
| 3.6L Pentastar oil cooler housing leak | 60k - 90k mi | $600 - $1,200 | Sometimes |
| HVAC blend-door actuator (clicking) | 20k - 60k mi | $150 - $400 | No |
| Tailgate / door latch failure | 15k - 50k mi | $200 - $500 | No |
| 8HP transmission shudder | 30k - 70k mi | $300 - $2,000 | Sometimes |
🔋 1. eTorque mild-hybrid faults (the real dealbreaker)
The eTorque system replaces the alternator with a 48V belt-starter generator and adds a small lithium-ion battery behind the rear seat. It powers auto start-stop, a brief torque assist, and smoother restarts. When it works, you barely notice it. When the 48V battery or the BSG degrades, owners report rough or stalling restarts, an illuminated warning light, charging faults, and sometimes a no-start.
Out of warranty, an eTorque battery replacement runs 2,500 to 3,500 dollars, and a belt-starter generator alone is roughly 1,800 to 2,800 dollars installed. This is the single most expensive common failure on the truck and the reason eTorque tops our dealbreaker list. If a stalling or charging warning appears, see our guide on why a truck won't start before you spend a dime. Not every 2020 Ram 1500 has eTorque, the base 3.6L V6 and the non-eTorque 5.7L HEMI skip it entirely, so a used buyer can sidestep this risk by checking the window sticker or build sheet.
⚡ 2. Electrical and UConnect infotainment glitches
By far the highest complaint count by volume is electrical. The big 8.4 and 12-inch UConnect screens are known to randomly reboot, freeze, go black, or lose the backup-camera feed. Owners also report phantom warning chimes, door-ajar messages with closed doors, and parasitic battery drain that kills the 12V battery overnight.
Many of these are software and have been addressed with dealer reflashes at no cost. A persistent dead screen, however, can mean a radio module replacement at 800 to 1,400 dollars. A weak or dead 12V battery is a common root cause of strange electrical behavior, so test it first. If you see a charging or battery light, our P0562 system voltage low page walks through the diagnosis. These glitches are annoying but rarely a dealbreaker on their own.
🛢️ 3. Pentastar oil cooler leak and 4. HVAC actuators
On 3.6L Pentastar V6 trucks, the plastic oil cooler housing and its gaskets sit in the engine valley and harden with heat cycles. After 60,000 to 90,000 miles they weep oil, sometimes onto hot components, leaving a burning smell and drips. The repair is 600 to 1,200 dollars depending on whether the shop installs the updated housing. It is a known weak point across many Pentastar applications, not unique to Ram, but worth checking on any high-mileage 2020. If you smell burning oil, read our burning oil smell guide.
The HVAC blend-door actuators are a classic Ram annoyance. A repeated clicking or tapping behind the dash, often when you change temperature or start the truck, signals a failing actuator. Parts are cheap at 30 to 80 dollars, but labor can push the bill to 150 to 400 dollars if it is buried. Use 0W-20 full synthetic per spec and stay on top of oil changes to keep the Pentastar healthy.
🔧 5. Tailgate latches, door handles, and transmission shudder
The 2020 Ram 1500 has scattered reports of tailgate latch and power-release actuator failures, plus interior door-handle breakage. These are inconvenient but cheap, typically 200 to 500 dollars, and not a reason to pass on an otherwise clean truck.
The ZF-based 8-speed (8HP) automatic is generally strong, but some owners report a torque-converter shudder, a faint vibration around 30 to 50 mph under light throttle. Often it clears with a proper full transmission fluid exchange using the correct ZF spec fluid at 300 to 600 dollars. If it does not, a torque converter or valve body can run 1,500 to 2,000 dollars, which moves it into dealbreaker territory. Always test-drive at varying speeds and feel for that shudder before buying.
🧭 The 60-second buyer decision framework
Use this quick checklist when you are looking at a used 2020 Ram 1500. If you cannot clear the first three, get a price discount or walk.
- Check for eTorque. Look for the badge or build sheet. If equipped, confirm no charging or stop-start warnings and ask for any battery service history.
- Cold-start it yourself. Watch the restart from auto stop-start, listen for stalling, and scan the dash for charging lights.
- Test-drive at 30 to 50 mph. Feel for transmission shudder under light throttle.
- Cycle the UConnect screen. Reboot it, run the backup camera, and toggle HVAC temperature to surface actuator clicks.
- Look under the engine valley on V6 trucks for oil weeping near the cooler housing.
Pricing a quoted repair? Run the number through our repair quote checker before you authorize the work, and pull a full ranked cause list with our AI diagnosis.
❓ Frequently asked questions
📝 TL;DR
The 2020 Ram 1500 is a comfortable, capable truck with one expensive Achilles heel: the 48V eTorque system, which can cost 1,800 to 3,500 dollars when it fails between 40k and 80k miles. The rest of its known issues, UConnect reboots, the Pentastar oil cooler leak at 600 to 1,200 dollars, blend-door clicks, and tailgate latches, are nuisance-level and cheap. Confirm eTorque health, test-drive for transmission shudder, and a 2020 Ram 1500 is a reasonable used buy at the right price.