2024 Hyundai Elantra: What to check before buying

The horn quits without warning in most of these reports. A blown fuse often gets replaced first, then the horn fails again, and replacement horns are sometimes back-ordered. Failures show up as early as 1,000 miles. Other reports describe the battery draining overnight in nearly new cars, a rear camera that switches to a "No signal" screen, and an amplifier failure that silences blind-spot alerts. Hybrid owners also report stalling at low speed. A new throttle body did not fix it. Single reports cite false collision braking with self-steering and delayed deceleration.

Power steering suddenly goes heavy while driving, along with a dead speedometer and tachometer, a check engine light, and the collision warning systems cycling through a self test. Dealers report they cannot duplicate it. Two reports are crash-related. In one, the car surged in a parking lot and jerked left over a curb, deploying the airbag and totaling the vehicle. The other is a horn failure, where a service bulletin specifying one part number left the dealer without parts. Another horn failure appears at 10,000 miles.

A false driver attention alert is the main complaint. The car shows a coffee cup with "Consider Taking a Break" and beeps every 5 to 10 minutes on the highway, even when the driver stays in the lane. Some say it also turns the radio down, and none found a way to switch it off. A separate report describes camera-disabled messages for lane, blind-spot, and forward collision warnings that clear after a few minutes, plus dash and screen dimming the dealer could not reproduce.

Two reports describe the oil drain plug coming loose after an oil change. Oil pours out and the engine is ruined. One repair estimate tops $11,000, and the dealer and the oil-change shop each blame the other while warranty coverage is refused. Sudden power loss is the other pattern. One car shut off in traffic with flashing dash lights at 8 miles. Another lost acceleration with a red speedometer at about 3,100 miles. In both cases the dealer found no fault.

A "Radar Blocked" message comes and goes for a week, then stays on and shuts off the forward safety systems. The radar was still physically in place. Another report describes the accelerator going dead while merging onto a freeway. The pedal dropped to the floor with no response and the car slowed until the driver pulled over and restarted it. No warning lights came on beforehand. With only two complaints, no wider pattern is clear.

The center-mounted brake light cuts out while driving and comes back after a restart. One owner reports this repeating for two years, starting days after purchase, and suspects wiring. A second report describes every electrical warning light coming on at once and power steering dropping out while driving. That matches loss-of-assist reports filed under steering. Both complaints describe intermittent faults rather than parts that fail and stay dead.

The car slows itself from 35 to 20 mph after showing a "School Zone" message where there is no school zone. The same report describes the instrument panel and center display going blank at various speeds, at roughly 10,000 miles. The dealer could not duplicate it. A separate report describes windshield cracks on both sides found while parked at about 1,000 miles. The driver-side crack sat in the line of sight, and the dealer said it was not a manufacturing defect.