The 2018 Nissan Altima uses a 26-inch driver-side blade, a 17-inch passenger-side blade, and a 12-inch rear blade.
For most 2018 Altima models (S, SR, SL), these lengths are standard. If blades were replaced previously or aftermarket blades were installed, verify the exact lengths in the owner's manual or by measuring the current blades before purchasing replacements.
Front wiper blade sizes
Front wipers on the Altima are mounted on the driver’s and passenger’s sides with two different blade lengths to optimize coverage across the windshield.
- Driver-side blade: 26 inches
- Passenger-side blade: 17 inches
In most 2018 Altima configurations, the front blades are 26" and 17". If your vehicle has aftermarket blades or a non-standard setup, confirm the lengths printed on the blades or in the owner’s manual.
Rear wiper blade size
The rear window uses a single blade to clear the back glass.
- Rear blade: 12 inches
The typical rear blade for a 2018 Altima is 12 inches; some variations exist if a different rear-wiper configuration was installed, but 12" is the standard length.
How to replace wiper blades
What you’ll need
Have the correct blade lengths on hand (26" driver, 17" passenger, 12" rear) and a clean workspace. No special tools are usually required for standard blade replacements.
Replacing wiper blades on the Altima is a straightforward, driver-friendly task that helps maintain clear visibility during rain or snow. Below are the basic steps to swap in new blades.
- Park the car, turn off the engine, and lift the driver's or passenger's wiper arm away from the windshield until the blade stands clear.
- Find the release mechanism on the blade adapter (a small tab or lever). Press or slide the release to detach the old blade from the arm.
- Attach the new blade by aligning the connector with the arm and sliding it in until it clicks into place. Ensure the blade is securely fastened.
- Lower the wiper arm back to the windshield and repeat the process for the other front blade if needed. Finally, test both front wipers to confirm proper operation and full contact with the glass.
Using the correct sizes and secure attachments helps ensure optimal wiping performance and prevents blade detachment at speed.
Summary
For a 2018 Nissan Altima, the standard wiper setup is a 26-inch driver-side front blade, a 17-inch passenger-side front blade, and a 12-inch rear blade. Always verify with the owner’s manual or by inspecting the current blades, especially if aftermarket replacements were installed. Regularly replacing worn blades maintains clear visibility in poor weather.