K&N 33-5057 High-Flow Air Filter for 2015-2020 Hyundai Sonata/Kia Optima 1.6L

Vehicle Fitment

• 2015-2018 Hyundai Sonata Eco (L4 1.6L Turbo, FWD)
• 2015-2019 Hyundai Sonata Sport 2.0T (L4 2.0L Turbo, FWD)
• 2015-2019 Hyundai Sonata Limited 2.0T (L4 2.0L Turbo, FWD)
• 2015-2017 Hyundai Sonata Ultimate 2.0T (L4 2.0L Turbo, FWD)
• 2016-2017 Hyundai Sonata Hybrid (L4 2.0L, FWD)
• 2016-2020 Kia Optima LX / LX 1.6T / EX (L4 1.6L Turbo, FWD)
• 2016-2020 Kia Optima SX / SX Limited / SXL (L4 2.0L Turbo, FWD)

Fitment Notes

• Does not fit the Hyundai Sonata or Kia Optima with the 2.4L naturally aspirated engine - those use a different airbox and filter
• Does not fit the Kia Optima 2.4L hybrid powertrain
• All applicable trims are front-wheel drive (FWD) only - neither the Sonata nor the Optima offered AWD in these generations
• The Kia Optima was renamed the K5 starting with the 2021 model year - this filter does not apply to the K5

Features

• Multi-layer oiled cotton gauze media delivers up to 50% more airflow than standard paper filters
• Drop-in design fits directly into the factory airbox - no modifications required
• Washable and reusable - engineered to last the lifetime of the vehicle
• Pre-oiled and ready to install straight out of the box
• Compatible with OEM sensors and vehicle electronics
• Up to 50,000-mile service intervals under normal driving conditions
• Backed by K&N's 10-Year/Million Mile Limited Warranty

Specifications

• Part Number: 33-5057
• Filter Type: Panel (Drop-In Replacement)
• Filter Media: Oiled Cotton Gauze
• Color: Red
• Length: 11.063 in. (281 mm)
• Width: 8.625 in. (219 mm)
• Height: 1.438 in. (37 mm)
• Service Interval: Up to 50,000 miles under normal driving conditions

Included Components

• 1x K&N 33-5057 High-Flow Panel Air Filter

Product Description

The K&N 33-5057 is a direct-fit high-flow replacement air filter engineered for the 2015-2019 Hyundai Sonata and 2016-2020 Kia Optima equipped with 1.6L Turbo or 2.0L Turbo four-cylinder engines. It replaces the factory paper element with a layered oiled cotton gauze design that flows significantly more air, supporting improved throttle response and engine efficiency across both turbocharged applications. Installation is a straightforward drop-in swap into the existing factory airbox with no cutting, drilling, or adapters required.

Unlike disposable filters, the 33-5057 is fully washable and reusable using K&N's Recharger cleaning kit, making it a permanent, cost-effective upgrade for turbo Sonata and Optima owners. It is backed by K&N's 10-Year/Million Mile Limited Warranty. Note that this filter is specific to the 1.6L and 2.0L turbocharged engine variants - owners with the 2.4L naturally aspirated engine should verify compatibility before ordering.