Ram redesigned the 1500 for the 2019 model year, so by 2021 the platform was in its third year and most early bugs were sorted. That maturity shows up in strong owner-satisfaction scores. But three areas still generate the bulk of complaints: electronics, the 48-volt eTorque hardware, and occasional valvetrain noise on the 5.7L HEMI V8. Below we rank them by how often they are reported, when they show up, and what they cost.
📊 Most-reported problems, ranked
This table ranks the issues by how frequently 2021 owners report them, the mileage band where they typically appear, the rough out-of-warranty repair cost, and our severity call.
| Problem | Typical mileage | Repair cost | Severity |
|---|---|---|---|
| Uconnect 5 screen reboot / black screen | 0–40k | $0–$1,400 | Annoyance |
| eTorque BSG / 48V battery fault | 40k–70k | $1,200–$2,500 | Moderate |
| HEMI cold-start tick | 20k–60k | $0–$300 | Watch |
| HEMI lifter / camshaft failure | 60k+ | $3,000–$6,000 | Dealbreaker |
| Multifunction tailgate sticking | 15k–50k | $150–$600 | Annoyance |
| Electrical gremlins (TIPM, sensors) | 30k–70k | $200–$1,200 | Moderate |
| Death wobble (steering shimmy) | Any | $150–$900 | Moderate |
Costs are typical independent-shop estimates and vary by region. If your truck is still inside the 3-year/36,000-mile bumper-to-bumper or 5-year/60,000-mile powertrain coverage, several of these are free.
🔌 Electronics: the number one complaint
The single most-reported 2021 Ram 1500 problem is the Uconnect 5 infotainment system. Owners describe the 12-inch or 8.4-inch screen freezing, rebooting on its own, going black, dropping Apple CarPlay and Android Auto, or losing the backup camera feed. It is more aggravating than dangerous, and the good news is that the fix is often a free software flash at the dealer.
If a reflash does not solve it, the screen module or radio head unit may need replacement, which runs roughly $700 to $1,400 out of warranty. Before paying for that, try the simple steps in our how-to guide on resetting a frozen Uconnect screen. A surprising number of cases clear with a hard reset or a battery disconnect.
Beyond the screen, a smaller group of owners report random electrical gremlins: phantom warning lights, dead USB ports, intermittent door-lock behavior, and parking-sensor faults. If you are chasing one, start with the electrical problem symptom guide to narrow the circuit before a shop starts swapping parts.
⚡ eTorque and the 48-volt system
If your 2021 Ram 1500 has the eTorque mild-hybrid setup, either standard on the V6 or optional on the V8, it adds a belt-starter generator and a small 48-volt battery pack mounted behind the rear seat. When it works, it smooths out auto stop-start and adds a little low-end torque. When it fails, you may see a check-engine light, a disabled stop-start, or a message warning that the mild-hybrid system needs service.
The belt-starter generator and the 48-volt battery are the most expensive common failures on this truck, typically $1,200 to $2,500 once you are out of the 8-year/100,000-mile hybrid-component warranty that covers the high-voltage parts in many states. Codes such as P0AA6 point to the high-voltage system and should never be ignored. If you do not tow and want fewer moving parts, a non-eTorque truck is the simpler buy.
🔥 The HEMI engine question
The 5.7L HEMI V8 is the heart of most 2021 Ram 1500 trucks, and it is mostly dependable. But it carries two valvetrain reputations worth knowing. The first is the well-known "HEMI tick," a light ticking on cold start that, in most cases, is benign exhaust-manifold or normal injector noise and costs nothing to live with.
The more serious version is an actual lifter or camshaft failure. A minority of these engines drop a roller lifter, which can score the camshaft and, in bad cases, send debris through the engine. That repair runs $3,000 to $6,000, and on a high-mileage truck it can total the deal. Symptoms include a persistent metallic tick that does not go away when warm, a misfire, and codes like P0301. Read our engine ticking noise guide to tell a harmless tick from an expensive one.
To stack the odds in your favor: change the oil every 5,000 to 7,500 miles, use the factory-spec 5W-20, and avoid stretching intervals. The 3.6L Pentastar V6 does not have the lifter issue and is the lower-risk powertrain if you do not need V8 towing capacity.
🚧 Tailgate, suspension, and the rest
Two more items round out the common-complaint list. The multifunction split tailgate, a popular option, can develop sticky latches or a door that will not release in cold weather. A clean-and-lubricate fixes most cases for under $150; a failed actuator can run up to $600.
On the suspension side, a small number of owners report "death wobble," a steering shimmy felt after hitting a bump at highway speed. It is far less common on the 2021 than on older Ram heavy-duty trucks, and it usually traces to a worn steering damper, track bar, or tie-rod ends. It is a moderate fix, $150 to $900, but it is safety-related, so do not delay it.
What to watch on a used 2021
- Confirm any open recalls or software campaigns were completed by the dealer.
- Listen for engine tick at cold start, then again after it warms up.
- Cycle the Uconnect screen, CarPlay, and backup camera before buying.
- Test the eTorque stop-start; a non-functioning system can signal a pending repair.
- Drive over rough pavement at 50 to 60 mph to check for any steering shimmy.
🧮 Is this 2021 Ram a buy or a walk-away?
Use this quick framework when you are looking at a specific truck:
❓ Frequently asked questions
📝 TL;DR
The 2021 Ram 1500 is a strong-driving, mostly reliable truck with a known short list of issues. Expect Uconnect screen glitches (cheap or free), watch the eTorque 48-volt system ($1,200 to $2,500 if it fails), and screen any V8 for lifter tick (up to $6,000 in the worst case). The 8-speed transmission and the V6 are the dependable bright spots. Verify recalls, listen for engine noise, and test the electronics before you buy, and you will avoid the only truly expensive surprises.