CVT SUB-ASSEMBLY SERVICE PARTS ARE NOW AVAILABLE SERVICE INFORMATION The CVT Belt & Pulley (sub-assembly) Kit is now available to order. The sub-assembly kit part numbers and other parts needed, if a repair is indicated, are listed in PARTS INFORMATION. ï· This bulletin does not include diagnostic or service procedure information. ï· Refer to the ESM for necessary diagnostic information before performing a CVT repair.
full bulletin at NHTSA ↗2021 Nissan Sentra powertrain problems
moderate 4 complaints filed with NHTSA · avg repair $2,500 · see powertrain across all vehicles →
Complaints
4
Recalls
0
Avg fix
$2,500
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering powertrain on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
CVT SHIFT SELECTOR LEVER KNOB REMOVAL AND INSTALLATION SERVICE INFORMATION If the CVT Shift Selector Lever Knob needs to be removed or installed for any reason, refer to the SERVICE PROCEDURE in this bulletin, beginning on page 2.
full bulletin at NHTSA ↗CLICKING NOISE FROM FRONT OR REAR AXLE DURING TAKE-OFF/ACCELERATION This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
full bulletin at NHTSA ↗PREVENT FRONT AXLE THREAD DAMAGE DURING NUT REMOVAL This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
full bulletin at NHTSA ↗DRIVE SHAFT BOOT SERVICE INFORMATION SERVICE INFORMATION If a Drive Shaft (Axle Shaft) Boot on an APPLIED VEHICLE is found to be leaking grease, AND There is no abnormal noise or obvious CV Joint risk due to water intrusion and/or complete grease loss, check for REPAIR KIT-DUST BOOT (CV Joint Boot Kit) availability. ï· If there is a REPAIR KIT-DUST BOOT (CV Joint Boot Kit) available for the vehicle being repaired, do NOT replace the axle. Install a new boot kit following the procedure in the ESM. o Refer to the ESM: TRANSMISSION & DRIVELINE > FRONT AXLE > REMOVAL AND INSTALLATION > FRONT DRIVE SHAFT BOOT o If the complete axle (drive shaft) is replaced when only a new boot is required, the
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
What owners are reporting 1 most recent
The first week of October my car making a terrible sound. My husband took it to South point Nissan Austin Tx. My brand new car needs a transmission It has trouble shifting gears, Making a loud “jet engine” sound. The dealer promised a loaner and never came through with it. I’m driving it as little as possible. Bumming rides and walking while I await a transmission replacement. Yes you are…
Had powertrain trouble with your 2021 Nissan Sentra?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the powertrain problem on the 2021 Nissan Sentra?
It's a documented issue but not catastrophic. 4 complaints have been filed. Repairs average $2,500 and most owners catch it before it causes a breakdown.
At what mileage does the powertrain typically fail?
Based on the 4 complaints filed, powertrain issues most often appear around 118,000 miles. Some report problems earlier; some make it well past 150,000 with no symptoms. Maintenance habits matter — vehicles that received timely fluid services and were not regularly overworked tend to last longer.
What does it cost to fix?
Independent shops typically charge around $2,500 for powertrain repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to powertrain?
No active recalls currently cover powertrain issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2021/Nissan/Sentra.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.