Front blades are typically 26 inches on the driver’s side and 18 inches on the passenger side, with the rear blade usually about 11–12 inches. Replacing them is a quick DIY task: lift the wiper arms, detach the old blades from their connectors, and snap in new blades until they click into place.
What you’ll need
Before you start, gather the correct blades and a few basic tools to make the replacement smooth. This list covers front and rear blade replacements for a 2020 Optima.
- Front wiper blades: 26" (driver) and 18" (passenger)
- Rear wiper blade: typically 11" or 12" (verify on packaging)
- Replacement blades compatible with your Optima’s connector type
- Optional: blade removal tool or small screwdriver for stubborn fittings
- Optional: microfiber cloth to wipe the blades and windshield
Having these items on hand helps you complete the job quickly and ensures a secure fit.
Front windshield wiper blades replacement
Replacing the two front blades follows the same basic process, with attention to the difference in blade length and connector type. The Optima’s front blades typically use a common adapter system, but always confirm that the connector type matches your new blades.
Connector types and quick tips
Most front blades on modern Kia models use a standard J-hook or a pin/side-lock adapter. If your new blades don’t seem to fit, check the adapter and swap to the correct one provided with the blades. Do not force a blade onto the arm; use the release mechanism on the blade housing to detach it cleanly.
- Turn off the ignition and ensure the wipers are in the parked position. Gently lift the driver’s side wiper away from the windshield until it stands roughly perpendicular to the glass.
- Press the release tab on the blade’s connector (or slide the blade off if your model uses a simple hook). Carefully detach the old blade from the wiper arm.
- Prepare the new blade by confirming it has the correct adapter. If needed, attach the appropriate adapter to the blade stem.
- Align the new blade with the wiper arm and push it onto the connector until you hear or feel a click, indicating it’s securely attached.
- Lower the wiper arm back to the windshield and repeat the process on the passenger side. Slide the blades gently along the glass to ensure they sit flat and properly aligned.
With the front blades replaced, it’s wise to test them before you finish: turn on the wipers to verify a clean sweep and confirm they park correctly.
Rear windshield wiper blade replacement
The rear blade on the 2020 Optima is smaller and sits on a dedicated connector. Replacement steps are similar to the front but typically quicker since there is only one blade to handle.
Rear blade specifics and steps
Rear blades are usually 11–12 inches. Check the blade packaging to confirm the exact size and connector type for your vehicle.
- Turn off the vehicle and gently lift the rear wiper arm away from the rear window.
- Release the old blade from its connector by pressing the release tab or sliding the blade out, depending on the design.
- Attach the new blade by aligning it with the connector and pushing until it clicks into place.
- Lower the rear wiper arm back onto the window and give it a quick wipe to ensure full contact across the glass.
- Test the rear wiper to confirm smooth operation and proper parking when in the off position.
After finishing the rear blade, wipe the area around the window and run a quick test to ensure the blade clears evenly across the glass.
Summary
Replacing the windshield wiper blades on a 2020 Kia Optima is a straightforward task you can do at home. Remember to use the correct sizes—26" and 18" for the fronts, and about 11"–12" for the rear—and to verify the connector type on your new blades. Lift, detach, attach, and test. Regular replacement helps maintain visibility in rain and snow and preserves your safety on the road.