The 2017 Hyundai Sonata uses two spark plug configurations depending on the engine option: both configurations employ long‑life iridium or platinum plugs, with the exact part number determined by the engine code and VIN. For the precise specification, consult the owner's manual or Hyundai’s official parts lookup for your vehicle.
Engine options and spark plug types
In 2017, the Sonata was offered with two four‑cylinder engines. Each engine uses high‑quality, long‑life spark plugs designed to maximize efficiency and reduce misfires, but the exact plug part number varies by engine code and market.
- 2.4-liter inline-four GDI (Nu/Theta II): generally uses long‑life iridium or platinum spark plugs suitable for modern direct‑injection engines.
- 2.0-liter turbocharged inline-four GDI (Theta II): also uses long‑life iridium or platinum plugs to cope with turbocharged operation and higher combustion pressures.
Copper-core or standard, non‑lifetime plugs are not recommended for these engines due to durability and performance considerations. Because the exact plug number is tied to the engine code and VIN, always verify via Hyundai’s parts catalog or your dealership to ensure you get the correct part.
How to verify the exact part number for your car
To confirm the exact spark plug specification for your particular Sonata, use these steps:
- Locate your VIN and determine the engine code from the dash label or vehicle paperwork.
- Use Hyundai’s official parts lookup or a reputable parts retailer and enter your VIN to pull the correct spark plug part number and gap specification.
- Cross-check the information with the owner’s manual or service documentation, and confirm the replacement interval for your engine variant.
- Purchase OEM or equivalent high‑quality iridium or platinum plugs from a trusted brand (common aftermarket options include NGK and Denso).
If you cannot find the exact part number online, contact a Hyundai service department or a qualified technician with your VIN to confirm the correct specification for your engine variant.
Maintenance considerations and tips
Key maintenance points for the Sonata’s spark plugs
Using the correct spark plugs helps preserve performance, fuel efficiency, and emission control. When replacing plugs, adhere to the OEM torque specs and ensure the ignition coils and surrounding area are clean to prevent misfires. Replacement intervals for long‑life iridium or platinum plugs are typically longer than copper plugs, but driving conditions and climate can affect longevity.
- Always use plugs approved for your engine code and VIN; aftermarket equivalents should meet or exceed OEM specifications.
- Inspect ignition components during service and address any signs of wear or corrosion to avoid misfires.
- Keep records of replacement intervals to maintain optimal performance and avoid unnecessary maintenance costs.
Following the manufacturer’s guidance on plug type, gap, and replacement timing helps sustain the Sonata’s performance and efficiency over time.
Summary
The 2017 Hyundai Sonata employs two spark plug configurations—one for the 2.4L GDI and another for the 2.0L turbo—both using long‑life iridium or platinum plugs. The exact part number depends on the engine code and VIN, so verify through the owner’s manual or Hyundai’s parts lookup and choose OEM or equivalent high‑quality plugs. This check ensures proper performance, longevity, and reliability for your specific vehicle.