Buyer Research

2021 Nissan Sentra — Should You Buy One?

Typical asking price: $14,000–$18,000. There are 2 high-severity known issues you need to know before handing over a check.

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Kestrel Take

Second year of the B18 and the same three problems as the 2020, in a smaller file: 131 complaints, split almost evenly between tie rods (31%, with 11 crash reports — the highest crash share of anything on this page), phantom emergency braking (29%) and an electrical cluster that is mostly windows and batteries (29%). The tie-rod recalls carry over from 2020 and so does our reading of them: this is a recall-verification car. One with 21V461 and 23V581 closed with new tie rods, a centred wheel, and every window working is a sound compact at this price; one with the recall letter still in the glovebox and 'parts on order' is not yet.

What we checked

Reconciled against public records, 2026-09-25

NHTSA holds 131 owner complaints for the 2021 Nissan Sentra, and 3 recall campaigns.

A big number here usually means a lot of these were sold, not that it is a bad vehicle — popular models collect more complaints for the same rate of trouble. So the total on its own says little. What is worth reading is the shape of it. 31% of them are about one thing — steering. That much concentration is a genuine pattern rather than background noise, and it is the first thing to check on any example you look at.

3 recall campaigns cover this model year. Recalls are repaired free, for any owner, with no time limit on most safety campaigns — but only if someone books it in. Ask the seller to show it was done, or have any dealer check the VIN; it takes them a couple of minutes and costs nothing.

Counts come from the NHTSA complaint and recall database — free, public, and worth checking yourself.

Known Issues for the 2021 Nissan Sentra

Ranked by wallet impact. These are documented, recurring problems — not freak accidents. How we decide that.

Tie rods bend after a pothole and can break — a wheel that stops steering (two recalls)High — wallet impact

Recalls 21V461 and 23V581 both name the front tie rods on this Sentra: a hard pothole or curb hit bends them, and a bent rod can fracture. One owner here hit a pothole at 30 mph, heard a pop on the next turn, and the front passenger wheel seized. 40 complaints, 11 of them crash reports, and a long tail of owners who received the 23V581 notice and were told the part was not available. Insist on seeing the repair order — 'inspected' under the first recall is not the same as replaced under the second. Then drive it: the wheel should be centred going straight, with nothing shaking through it in a bend.

Repair cost: $0 with the recall — verify it was performed

Source: NHTSA complaints filed under steering (40); 3 NHTSA recall campaigns on this model year.

Automatic emergency braking slams the brakes on with an empty road aheadHigh — wallet impact

38 owners describe the same event: a beep, a red flash on the cluster, and the car braking hard at road speed with nothing in front of it, sometimes twice in a week, sometimes for the first time after a service visit. Dealers say they cannot duplicate it and send the car back. A few pair it with 'maintenance' or malfunction warnings for the AEB system. The wallet exposure is a radar sensor or a reflash if a fault is ever found; the safety exposure is the car behind you. Ask the seller the plain question — has it ever braked on its own? — and drive it long enough for the system to be awake, 20 minutes at 40 mph and up.

Repair cost (estimate): $0–$300 for a reflash; $800–$2,000 for a radar unit

Source: NHTSA complaints filed under the driver-assist and automatic braking systems (38).

Passenger windows go dead, batteries die young, and the car occasionally will not startMedium

The electrical cluster is three small things. Every window but the driver's stops responding — several owners, same description — which points at the driver's master switch or the body control module rather than four motors. Batteries replaced twice inside a few years, and an intermittent no-start with the fob in the car. And the infotainment rebooting mid-reverse, taking the camera with it. Try every window from every seat, have the battery load-tested, and cycle the ignition off and on three times before you leave.

Repair cost (estimate): $150–$600

Source: NHTSA complaints filed under electrics and electronics (38).

Rearview camera harness chafes — distorted or missing image (recall)Medium

Recall 23V628 covers 2020–2021 Sentras: the camera's wiring harness can be damaged where it routes, and the display shows a distorted picture or nothing. The dealer inspects, replaces damaged parts, and tapes the harness if it is intact. Because the 2021's infotainment can also drop the camera on its own, a working image in reverse is worth checking twice — once cold, once after the drive.

Repair cost: $0 with the recall — verify it was performed

Source: NHTSA complaints filed under electrics and electronics (38); 3 NHTSA recall campaigns on this model year.

Walk-Away Red Flags

✗Steering wheel sitting off-centre on a straight road
✗Popping or clunk from the front end over a bump or in a slow turn
✗Recall 23V581 still shown open, or 'inspected' with no parts invoice
✗Passenger windows that do not respond from any switch
✗AEB warning or a sudden unexplained brake grab on the test drive

Good Signs

✓New tie rods on a Nissan repair order closing recall 23V581
✓Steering wheel centred and steady through a 40 mph sweeping curve
✓All four windows working from the driver's master switch and their own
✓Battery load test passed, with a purchase date on the battery label
✓Recall 23V628 camera harness inspection shown complete