Yes. The 2020 Hyundai Elantra uses an immobilizer transponder chip in its key fob as part of Hyundai's smart-key system.
In this article, we explain what that chip does, how it works with the car’s security system, and what to expect across different key configurations for the 2020 Elantra.
What the chip does
The immobilizer chip communicates with the car’s engine control unit to verify a legitimate key. Without a valid transponder, the engine will not start, even if you can turn the ignition or press the start button with the remote.
Key configurations in the 2020 Elantra
Hyundai offered a range of key configurations for the 2020 Elantra depending on trim and market. Below are the typical setups you might encounter, all of which include a transponder chip capable of starting the car.
- Proximity smart key with push-button start: The common setup on newer trims, featuring a transponder chip and a battery-powered fob for remotes and entry.
- Conventional mechanical key (with a hidden blade): Some keys include a mechanical backup blade for emergencies; the fob still contains the immobilizer chip to start the car.
- Spare or secondary keys: Additional keys you use will also include a transponder chip to operate the immobilizer.
In practice, any key meant to start the 2020 Elantra relies on the immobilizer chip, with the exact form factor varying by trim and region.
How the immobilizer and push-button start work
When you approach the vehicle with the key, the system reads the transponder’s unique code. With a proximity key and push-button start, you simply press the button while the key is within range. If the code doesn’t match, the car won’t start and may enter a security mode.
What to do if you lose your key
Contact a Hyundai dealer or a licensed automotive locksmith. You’ll typically need proof of ownership and the vehicle’s VIN. Replacement keys include a programmed transponder so they work with the car’s immobilizer.
Summary
The 2020 Hyundai Elantra uses an immobilizer transponder chip in its key fob as part of Hyundai’s smart-key and anti-theft system. While configurations can vary by trim and market, all keys intended to start the vehicle include the chip, usually integrated with a proximity fob and, if applicable, a mechanical backup key blade. If you lose a key, a dealer or qualified locksmith can provide a replacement that is properly programmed to your car.