2021-2023 Nissan Windshield Wiper Performance TSB

Nissan has issued Technical Service Bulletin (TSB) NTB20-010C to address concerns regarding windshield wiper blade performance on various 2021-2023 Nissan vehicles. This bulletin provides comprehensive service information and a diagnostic procedure to help identify and resolve issues related to reduced wiper effectiveness.

Environmental factors such as dirt, dust, debris, ice, snow, and even bugs can significantly diminish the cleaning capability of windshield wiper blades. Over time, worn wiper blades can not only impair driver vision but also potentially cause damage to the windshield itself. This TSB guides technicians and owners through a systematic process to evaluate the condition of wiper blades and determine if replacement is required to restore optimal visibility and ensure safe driving conditions.

Symptoms of Poor Wiper Performance

Owners may notice several signs indicating that their Nissan windshield wiper performance is compromised. These can include:

• Streaking: Visible lines or smears left on the windshield after the wipers pass.
• Haze: A cloudy or foggy film that forms on the glass, especially under the wiper connectors.
• Chatter: The wiper blades skipping or vibrating across the windshield instead of gliding smoothly.
• Unwiped Areas: Sections of the windshield that remain wet or uncleared after the wipers operate.
• Water Remaining: Puddles or significant amounts of water left on the windshield, indicating inefficient clearing.

Important Warning

Nissan emphasizes a critical precaution during any wiper system inspection or cleaning:

"NOTICE To avoid damage to the windshield or windshield wiper blades, do not operate the windshield wipers while the windshield is dry. Spray water onto the windshield using a garden hose or use the washer switch to spray the windshield washer fluid."

Always ensure the windshield is wet before operating the wipers to prevent unnecessary wear or damage to components.

Diagnosis Procedure

To accurately assess Nissan windshield wiper performance, follow these steps:

1. Clean the Windshield: Begin by thoroughly cleaning the outside of the windshield using a washer solution or a mild detergent.
2. Clean Wiper Blades: Clean each individual wiper blade by wiping it with a cloth soaked in a washer solution or a mild detergent.
3. Rinse Blades: Rinse each wiper blade with clear water to remove any cleaning residue.
4. Test Operation: Spray the windshield with washer fluid using the washer switch while operating the windshield wipers. Observe the wipe pattern and effectiveness.

Evaluating Wiper Blade Performance

After the cleaning and testing steps, the next crucial part of diagnosing Nissan windshield wiper performance involves grading the wiper blade performance using the