There are 4 stored owner reports matching the engine leading-label group for the 2021 Lincoln Aviator in our NHTSA-sourced dataset. These are unverified consumer reports and may not reflect confirmed defects.
This group counts stored reports whose component label starts with one of this site's matching prefixes, ignoring case. Each matching report counts once within the group. Components mentioned later in the label or only in the narrative are not searched. How component counts work
Loaded 4 of 4 matching reports.
Open the full vehicle complaint log (all categories)1.) Exhaust System Failure (Flex Pipe / Catalytic Converter) The vehicle’s exhaust system—specifically the flex pipe connected to the catalytic converter—cracked and malfunctioned. This component is available for inspection upon request. As a result of the failure, exhaust fumes entered the cabin, creating a significant safety risk due to potential exposure to carbon monoxide. Prior to the failure, I noticed a persistent rattling noise at low speeds and while the vehicle was idling. The issue was inspected and confirmed by the dealership; however, I was informed that the repair falls outside of warranty coverage. I would like to know if this falls under safety hazard for emissions. 2.) Sunroof Glass Shattering Incident While driving, the sunroof glass suddenly shattered and appeared to implode outward. According to the dealership technicians, this may have been caused by thermal stress or frame-related tension. The glass is no longer intact but the remaining components and frame can be inspected upon request. The incident posed an immediate safety hazard to both myself and other road users due to the sudden loss of glass and the potential for debris. I did not observe any warning lamps, messages, or symptoms prior to the failure. After researching the issue, I found that similar sunroof glass failures have been reported across various Ford/Lincoln models, suggesting this may be a known manufacturer defect. The dealership has confirmed the damage but no inspection by the manufacturer, police, or insurance representatives has been conducted at this time.
The engine of my 2021 Lincoln Aviator with only 79,403 miles has failed, leaving myself and my family stranded on the side of a very busy interstate in another state far from home. There were absolutely no warnings given before the engine acted as if it had a significant loss of power. Shortly afterwards, very heavy and foul-smelling smoke started coming out of the tail pipe. Had the vehicle transported to a local shop to my home. The car will start and immediately start smoking and running like crap. When you put it in gear it will barely move on it's own power.
Vehicle has 5400 miles and has catastrophic engine failure while driving. Vehicle towed to dealership and diagnosed engine seized needs complete engine replacement
In regards to my brand new 2021 Lincoln Aviator Reserve (4181 miles): 2.23.22- Driving home on a very narrow, winding road when my car unexpectedly started to vibrate/shake. There were no alerts and no warning lights that came on. Fortunately, I was coming up on one of the very few turnouts available. As I started to pull over the car completely shut off (completely died). Luckily, I made it off of the road or I would have been stuck in the middle of the road on a blind corner as the car would not restart. It just kept displaying "Full Accessory Power Active" but would not do anything. The car was towed back to the dealership who informed me the next day that the engine had completely seized and they would have to replace the engine. One of the piston rods was bent to a 90 degree angle. I got it back on a Saturday afternoon(3.12.22), drove home from work, took my kids to/from school Monday, then drove to work Tuesday morning. On my way to work (which is only 3 miles from home) my car started to vibrate again but I was able to turn off the highway onto a side road and the vibrating stopped. Thankfully, it did not die in the middle of the highway and cause an accident. I continued on down the street and again the vibrating started. As I pulled up to a stop sign the car completely died and would not start. I waited a few moments and tried again and it started. I was able to make it the last less than quarter of a mile to work while it vibrated then died yet again as I pulled into my parking spot. My fiancé came later in the day and started the car. It was making a loud knocking noise so we shut if off and called dealer again. It was towed back for another new engine. As of today, they are still working on "repairing" the brand new death trap. Lincoln doesn't seem to think it's a big deal and thinks the second new engine will fix the issue. Hopefully it doesn't kill me first. This is worth investigating. Like I said, this car is a death trap.
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
NHTSA source checks for this vehicle year
Checks are recorded separately for each dataset, not for the whole page. Dates use UTC. A missing check date does not mean no records exist.
Vehicle import recorded: Apr 28, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.