Hyundai Elantra

2021 Hyundai Elantra

SE, SEL and Limited with the 2.0L, plus the sportier N Line with the 1.6L turbo and a 7-speed dual-clutch. Hybrid comes in Blue and Limited trims. The performance Elantra N did not arrive until 2022, so 201 hp from the N Line is the top of the 2021 range.

Reliability 4.0/5$400–$720 per year, maintenance and repairs per year to run

Overview

2021 is a clean-sheet redesign — the CN7 generation — and it is a much more ambitious car than the Elantra it replaced. It is longer and lower, gets a genuinely modern interior with available twin 10.25-inch displays, and adds a hybrid to the range for the first time. Hyundai backs it with a 10-year/100,000-mile powertrain warranty for the original owner, and 5 years/60,000 miles that transfers to subsequent owners.

The engine question is worth being clear about. The 2.0L Smartstream is a new design with multi-point port injection, not the Nu or Theta engines associated with Hyundai's connecting rod bearing failures and engine replacement campaigns. Those campaigns centered on 2.0L and 2.4L GDI engines from an earlier family. The 2021 Elantra's 2.0L is not part of that story, and it is one of the more reassuring things you can know about this car.

SE and SEL get the 2.0L with Hyundai's IVT — a continuously variable transmission Hyundai markets under a different name.
N Line gets the 1.6L turbo with a 7-speed dual-clutch, which behaves very differently in traffic and is worth a long test drive.
Hybrid pairs a 1.6L with a 6-speed dual-clutch rather than a planetary eCVT, giving it a more conventional shifting feel than a Toyota hybrid.
First-model-year caveats apply — most 2021 complaints are electronics and software rather than mechanical.

EPA combined, 2.0L SE: 37 mpg
EPA combined, N Line: 31 mpg
EPA combined, Hybrid Blue: 54 mpg
Powertrain warranty: 10 yr / 100,000 mi original owner; 5 yr / 60,000 mi transferred
Timing: Chain on all engines

Reliability & running costs

Better than Hyundai's reputation from a decade ago and better than most first-model-year redesigns. The engines are new-family designs that sit outside the Theta and Nu bearing-failure history, the body and paint are the usual Hyundai compromise, and the complaints that do exist skew toward software, infotainment and 12V battery behavior rather than powertrain failures. The transferable 5-year powertrain warranty is a real asset on the used market.

Reliability score: 4.0 / 5
Maintenance + repairs, per year: $400–$720 per year, maintenance and repairs

Recalls

Hyundai has issued safety recalls covering various 2021 models, defined by production date rather than model year alone. Check your specific VIN on the NHTSA recall database, and ask a Hyundai dealer to also check for technical service campaigns and warranty extensions, which are not published by NHTSA but are performed at no cost when applicable.

Known issues on the 2021 Hyundai Elantra

Reported by owners of this model year specifically — not generic advice.

Engines offered

Engine	Layout	Output	Fuel
Smartstream G2.0 MPI2.0L	Inline-4	147 hp	gasoline
Gamma II 1.6 T-GDI1.6L turbo	Inline-4	201 hp	gasoline
Smartstream G1.6 hybrid1.6L + electric	Inline-4 hybrid	139 hp	hybrid

Service schedule

What this vehicle needs and roughly when.

7,500 miles / 12 months
- Engine oil and filter — 0W-20 full synthetic on the 2.0L, 5W-30 on the 1.6L turbo
- Rotate tires
- Inspect brake pads, discs and hoses
- Inspect all fluid levels and check for leaks
15,000 miles
- Replace cabin air filter
- Inspect drive belt and tensioner
- Inspect suspension and steering linkage
- Inspect vacuum and crankcase ventilation hoses
30,000 miles
- Replace engine air filter
- Replace brake fluid (Hyundai specifies every 2 years / 30,000 miles)
- Inspect exhaust system and heat shields
- Inspect fuel filter and lines
45,000 miles
- Replace spark plugs on the 1.6L turbo
- Inspect turbocharger plumbing and intercooler connections on N Line
- Inspect DCT clutch actuator operation on N Line
- Inspect brake caliper slide pins and lubricate
60,000 miles / 5 years
- Replace engine coolant (first change, then every 30,000 miles)
- IVT fluid drain and fill under severe service
- Inspect water pump and thermostat
- Inspect wheel bearings and driveshaft boots
105,000 miles
- Replace spark plugs on the 2.0L
- Replace serpentine belt if cracked or glazed
- Inspect timing chain tensioner for noise
- Full front-end and suspension inspection

Codes this vehicle sets most often

Where the same code has a vehicle-specific root cause.

P0455
Hyundai's evap monitor is aggressive and this code on a CN7 Elantra is most often the fuel cap seal or the fuel filler assembly. Because the monitor runs after the car has been sitting overnight with a partially full tank, it commonly appears on the first cold start and then stays dormant for weeks. Read the P0455 guide.
P0171
On the 1.6L turbo, check the charge-air piping and the crankcase ventilation hose before anything else — a boost leak downstream of the mass airflow sensor is the usual cause. On the naturally aspirated 2.0L, which uses port injection rather than direct, a lean code more often points at a dirty MAF sensor or an intake gasket. Read the P0171 guide.
P0420
Uncommon on a car this new, and when it appears the downstream oxygen sensor is the more likely culprit than the converter itself. Worth noting for buyers: catalytic converters on Hyundai and Kia models are a known theft target, and a stolen converter will set this code alongside a very loud exhaust. Read the P0420 guide.

Owner questions

Does the 2021 Elantra have the Hyundai engine failure problem?

No. The engine replacement campaigns and rod bearing failures that gave Hyundai its reputation involved the Theta II and Nu engine families in earlier vehicles. The 2021 Elantra uses the new Smartstream 2.0L with port injection and a new-family 1.6L turbo, neither of which is part of that history.

Is the IVT the same as a normal CVT?

It is a CVT, but a chain-driven one rather than a push-belt design, and Hyundai programs simulated shift steps into it. In practice it feels less rubber-bandy than older CVTs. There is no failure pattern for this unit on the 2021 Elantra, though a fluid drain and fill around 60,000 miles is smart if you drive in traffic.

Should I buy the N Line?

Only after a long test drive that includes real stop-and-go traffic. 201 hp and an independent rear suspension make it a genuinely more entertaining car, but the dry dual-clutch transmission is jerky at creeping speeds and some people cannot live with it. If your commute is highway, it is a much easier recommendation.

How good is the warranty if I buy used?

The famous 10-year/100,000-mile powertrain coverage applies to the original owner only. A second owner gets 5 years/60,000 miles from the original in-service date — still generous, but check the in-service date rather than the model year, since a 2021 sold in late 2020 runs out sooner than you might expect.

Elantra or Corolla?

The 2021 Corolla has the longer track record and marginally lower running costs. The Elantra gives you a nicer interior, more standard technology, more warranty and usually a lower price. On mechanical risk the Corolla still has the edge; on value for money the Elantra makes a strong case.