
It can only be said that it depends on the integrity of the 4S shop. The presence or absence of edge sealant is not necessarily a criterion for determining whether the part is original. Introduction to Door Edge Sealant: Door edge sealant, also known as door sealing strip, is a product that seals the car door, making it harder to open, and serves functions such as shock absorption, waterproofing, sound insulation, heat insulation, dustproofing, and fixing. It is mainly applied to the door panels, door frames, side windows, front and rear windshields, engine hoods, and trunk lids, providing waterproofing, dustproofing, sound insulation, temperature insulation, shock absorption, and decoration. Targeted Areas: The door sealing system primarily focuses on two areas: one is the sealing of the door opening area, which is mainly achieved by an inner door sealing strip installed around the door opening flange on the side panel or an outer door sealing strip installed around the door. Some car models have both sealing strips, while others use only one. Different models adopt different sealing strategies based on performance requirements or cost objectives.

I've been repairing cars for over 20 years and have replaced many genuine Nissan doors. Let me tell you about the edge sealant. When replacing a door, the edge sealant is usually replaced as well because it's a crucial component for ensuring waterproof sealing. After removing the old door, we thoroughly clean the frame, scrape off residual adhesive marks, and then reapply professional door sealant evenly. Genuine Nissan kits usually come with pre-cut seals or adhesive, and we follow the manual for quick and precise installation. Skipping new sealant can lead to water leakage causing cabin mold, increased noise, or accelerated door frame rust - these are serious issues. I recommend owners replace doors at authorized dealerships where they use genuine sealants for perfect fitment. Small shops might skip this step to save costs. During routine maintenance, check if seals are cracked or aged - timely replacement prevents major troubles.

I just had the original door of my Nissan replaced last week and want to share my experience. It was damaged in an accident, so the insurance company arranged for a replacement with a genuine new door at their authorized repair shop. I specifically asked the technician about the edge sealant. He explained that the door assembly comes with a waterproof sealant layer. They first removed the old frame, cleaned the surface thoroughly, and then applied new sealant to ensure a perfect fit. This sealant mainly prevents rainwater leakage – without it, you'd definitely get drips during rainy days. After the replacement, I noticed the door closes more snugly and wind noise has reduced. The whole process took half a day and was covered under the repair costs, no extra charge. If you go to an independent shop, make sure they use Nissan-certified sealant – don't try to save money here, as fixing water leaks later would be much more troublesome.

As a car enthusiast, I pay great attention to details. Let's talk about the relationship between Nissan door replacement and edge sealant. When replacing an original door, the edge sealant will definitely be renewed, as the exposed sealant can dry out and crack over time, losing its effectiveness. The standard procedure involves removing old residual sealant and applying new sealing adhesive to fill gaps, preventing rainwater from leaking into the car and causing metal corrosion. Nissan's original sealant has excellent compatibility, and a single application can last for years. Skipping this step might not show immediate issues, but long-term water leakage can lead to short circuits in electronic components or mold growth in the interior, affecting vehicle condition and safety. I recommend that owners proactively request sealant renewal during repairs, as not all shops will automatically perform this step.


