2019 Nissan Sentra Windshield Replacement

Replacing the windshield on a 2019 Nissan Sentra is a moderately challenging but achievable DIY project for experienced car owners or mechanics. This article provides a detailed, step-by-step guide to help you safely and effectively replace your windshield. Remember that working with glass and sharp tools can be dangerous, so always prioritize safety and wear appropriate personal protective equipment (PPE). This includes safety glasses, gloves, and long sleeves.

Preparation and Tools

Before you begin, gather all the necessary tools and materials. Having everything on hand will streamline the process and prevent frustration.

Essential Tools and Materials:

New Windshield: Ensure it's the correct model and specification for your 2019 Nissan Sentra. Verify it for any defects before starting.
Windshield Removal Tool: This could be a cold knife, wire saw, or powered glass removal tool. A cold knife is a common and relatively inexpensive option.
Urethane Adhesive: High-quality automotive-grade urethane adhesive is crucial for a secure and watertight seal. Be sure to check the expiration date!
Urethane Primer: This prepares the pinchweld (the metal frame around the windshield opening) for the adhesive and promotes bonding.
Glass Cleaner: For cleaning the new windshield and pinchweld.
Caulking Gun: For applying the urethane adhesive.
Suction Cups: These help lift and maneuver the old and new windshields.
Razor Blades or Scrapers: For removing old adhesive from the pinchweld.
Heat Gun or Hair Dryer: Can be helpful for softening old adhesive. Use with caution!
Trim Removal Tools: Plastic pry tools for removing interior trim pieces without damage.
Safety Glasses: Absolutely essential for protecting your eyes.
Gloves: To protect your hands from sharp edges and chemicals.
Shop Rags: For cleaning and wiping surfaces.
Drop Cloths or Protective Covers: To protect your vehicle's interior and exterior.

Step-by-Step Windshield Replacement

1. Preparation and Protection:

Begin by protecting the interior and exterior of your vehicle. Cover the dashboard, seats, and hood with drop cloths or protective covers to prevent scratches or damage from tools, adhesive, or glass shards. Remove any loose items from the dashboard and front seats.

2. Removing Interior Trim:

Carefully remove any interior trim pieces that surround the windshield. This usually includes the A-pillars (the trim pieces on either side of the windshield), the rearview mirror, and any other moldings or sensors attached to the windshield. Use trim removal tools to avoid damaging the plastic clips and trim. Disconnect any electrical connectors associated with the rearview mirror or sensors. Remember to note the location of each clip and fastener for reassembly.

3. Cutting Out the Old Windshield:

This is the most critical step. If using a cold knife, insert the blade between the windshield and the pinchweld, starting at a corner. Carefully and slowly work your way around the perimeter of the windshield, cutting through the urethane adhesive. Keep the blade angled towards the windshield to avoid damaging the pinchweld. If using a wire saw, thread the wire through the urethane and use handles to "saw" through the adhesive. A powered glass removal tool provides the cleanest and fastest removal, but requires skill and practice. Proceed with caution to avoid cutting yourself or damaging the vehicle.

Alternative Method: Some prefer a wire saw. Make a small pilot hole in the urethane using a sharp awl. Thread the wire saw through the hole, attach the handles, and saw around the perimeter of the windshield, keeping the wire taut and close to the glass.

4. Removing the Old Windshield:

Once you've cut through the adhesive, use suction cups to carefully lift the old windshield out of the opening. Have a helper assist you, as the windshield can be heavy and awkward. Dispose of the old windshield responsibly. Many auto parts stores or recycling centers will accept them.

5. Preparing the Pinchweld:

This step is crucial for a proper seal. The pinchweld must be clean, dry, and free of any rust or debris. Use a razor blade or scraper to remove all traces of the old urethane adhesive. Be careful not to scratch or damage the paint on the pinchweld. If you find any rust, treat it with a rust converter before proceeding. Clean the pinchweld thoroughly with glass cleaner or a specialized pinchweld cleaner. This removes any remaining residue and ensures proper adhesion.

6. Applying Primer:

Apply the urethane primer to the pinchweld following the manufacturer's instructions. The primer promotes adhesion of the urethane adhesive and protects the pinchweld from corrosion. Use a clean applicator and apply a thin, even coat. Allow the primer to dry completely before proceeding to the next step. Drying times vary depending on the primer used and the ambient temperature. Consult the primer's technical data sheet.

7. Preparing the New Windshield:

Clean the new windshield thoroughly with glass cleaner. Remove any stickers or protective film. Some windshields have a black ceramic frit (a painted border) around the edge. This frit provides a bonding surface for the urethane adhesive. Some technicians will also apply primer to this frit to ensure excellent adhesion. If required, install any clips or fasteners for the rearview mirror or sensors at this stage.

8. Applying the Urethane Adhesive:

Load the urethane adhesive into the caulking gun. Cut the nozzle of the adhesive cartridge at a 45-degree angle to create a bead of the desired width. Apply a consistent, uniform bead of urethane adhesive around the perimeter of the pinchweld. Ensure the bead is tall and wide enough to create a proper seal. Follow the adhesive manufacturer's instructions for bead size and application technique. Avoid air gaps or breaks in the adhesive bead.

9. Installing the New Windshield:

Carefully lift the new windshield into place, using suction cups to maneuver it. Align the windshield with the pinchweld opening and gently press it into the urethane adhesive. Ensure the windshield is properly seated and centered. Apply even pressure around the perimeter to ensure good contact with the adhesive.

10. Securing the Windshield:

Use automotive masking tape or suction cups to hold the windshield in place while the urethane adhesive cures. Apply the tape around the perimeter of the windshield, securing it to the body of the vehicle. This prevents the windshield from shifting during the curing process. Follow the adhesive manufacturer's instructions for curing time. Typically, this is at least a few hours, but can vary depending on temperature and humidity.

11. Reinstalling Trim and Components:

Once the urethane adhesive has fully cured, remove the masking tape or suction cups. Reinstall all the interior trim pieces that you removed earlier. Connect any electrical connectors that you disconnected. Ensure all clips and fasteners are properly seated. Double-check that the rearview mirror and any sensors are securely attached.

12. Final Inspection:

Inspect the windshield for any leaks or gaps. You can use a hose to spray water around the perimeter of the windshield and check for any water intrusion inside the vehicle. If you find any leaks, you may need to apply additional urethane adhesive to seal them. Clean the windshield and surrounding areas with glass cleaner. Congratulations, you have successfully replaced the windshield on your 2019 Nissan Sentra!

Important Considerations:

Curing Time: Allow the urethane adhesive to fully cure before driving the vehicle. This is crucial for safety and to ensure a watertight seal.
Temperature and Humidity: Temperature and humidity can affect the curing time of the urethane adhesive. Follow the manufacturer's recommendations for optimal curing conditions.
Professional Installation: If you are not comfortable performing this task yourself, it is best to have the windshield replaced by a professional. Incorrect installation can compromise the structural integrity of the vehicle and lead to leaks.
Adhesive Selection: Use only high-quality automotive-grade urethane adhesive. Avoid using silicone-based sealants, as they will not provide a secure and watertight seal.
Patience: Take your time and work carefully. Rushing the process can lead to mistakes and compromise the quality of the installation.

Disclaimer: This guide is for informational purposes only. Always follow the manufacturer's instructions for all tools and materials used. The author is not responsible for any damage or injury that may result from following these instructions.