There are 2 stored owner reports matching the powertrain & transmission leading-label group for the 2021 Nissan Altima 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 2 of 2 matching reports.
Open the full vehicle complaint log (all categories)TRANSMISSION HAD FRONT SEAL LEAKING.CAR HAS LESS THAN 51,OOO MILES.
I am writing to formally lodge a complaint regarding a recurring transmission issue with my 2021 Nissan Altima. The car has been experiencing significant power loss while driving, which I am certain is linked to a malfunctioning CVT transmission system. Despite ensuring that the transmission fluid levels are correct, the problem persists. Recently, the car lost power while I was going at least 50 mph on a busy road, which is very dangerous. Additionally, I have come across numerous complaints from other owners of the same model experiencing similar transmission issues. This history of complaints indicates a widespread problem that poses a serious safety risk and warrants a recall. Although there is an extended warranty, I don’t think it is fair for others being out of warranty when this is a very known issue with all owners. A CVT should last way longer than 70,000 miles, and some owners even report issues as early as 25,000 miles. Some mechanics even tell all their Nissan customers about the cons of the CVT, so it is very well known to not be good. Nissan basically has a deadly issue on their hands. I kindly request a thorough investigation and appropriate action to resolve this matter. Thank you for your attention to this serious issue.
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.