fits model: Si, Civic. make: Honda. year: 2002–2005.

( Manufacturer Part Number: 72315-S5S-E01 ), ( Part Type: Door Strip ), ( Placement On Vehicle: Left, Right ), ( Country Of Origin: Japan )
The **Honda 72315-S5S-E01 (02-05 Civic Si EP3 Hatch Door Chassis Weather Strip, Part #306)** is a precision-engineered rubber and plastic weather sealing component designed exclusively for Honda s third-generation Civic Si (EP3) hatchback models produced between 2002 and 2005. This high-quality door chassis weather strip serves as a critical barrier against wind, dust, rain, and road debris, ensuring a tight seal between the door frame and the vehicle s body panel while also absorbing minor road vibrations to enhance ride comfort. Crafted from durable, weather-resistant rubber reinforced with a sturdy plastic housing, this weatherstrip is engineered to withstand the rigors of daily driving, including exposure to UV rays, temperature fluctuations, and the corrosive effects of road salt and moisture. Its contoured design features a series of interlocking ridges and a flexible lip that conforms seamlessly to the door s contour, preventing air leaks and maintaining cabin pressure for improved fuel efficiency and reduced interior noise. The part s robust construction also helps minimize water ingress, protecting the door s mechanical components and preventing rust formation in critical areas. Whether installed during routine maintenance or as part of a restoration project, this OEM-spec weatherstrip delivers a perfect fit, matching the original Honda specifications in both form and function, ensuring a factory-like seal that enhances the vehicle s performance, durability, and overall driving experience.
### **Pros and Cons of buying a Honda 72315-S5S-E01 (2002-2005 Civic Si EP3 Hatch Door Chassis Weather Strip Part #306)**
#### **Pros:**1. **Direct Fitment** This weather strip is specifically designed for the 2002-2005 Honda Civic Si (EP3 hatchback model), ensuring a proper seal without modifications.
2. **Improved Weather Resistance** A worn or damaged weather strip allows water, dust, and wind to enter the cabin, leading to rust, mold, and discomfort. Replacing it prevents these issues.
3. **Enhanced Comfort & Noise Reduction** A properly sealed door reduces road noise, drafts, and condensation inside the car.
4. **Prevents Long-Term Damage** Moisture ingress can corrode door panels, window regulators, and interior components over time. Replacing the strip now avoids costly repairs later.
5. **Easy Installation** This part is typically a straightforward DIY job, requiring only basic tools (screwdriver, pry tool, and adhesive if needed).
6. **Cost-Effective** Replacing a weather strip is far cheaper than dealing with rust damage, electrical shorts, or interior mold growth.
7. **Maintains Resale Value** A well-maintained Civic Si with intact weather strips holds its value better than one with visible wear.
#### **Cons:**1. **Potential for Poor Quality** If the part is counterfeit or low-grade, it may not last as long as an OEM or high-quality aftermarket alternative.
2. **Adhesive Issues** Some aftermarket weather strips may not stick properly, leading to gaps and rework. Proper surface preparation is essential.
3. **Time-Consuming Installation** If the existing strip is stubbornly attached, removal may require extra effort, especially if adhesive residue remains.
4. **Limited Availability of OEM Parts** While this part is common, finding an exact OEM match (e.g., from a junkyard) can be difficult, making aftermarket options more likely.
5. **Secondary Damage Check Needed** If the door seal is being replaced due to existing damage, inspect the door panel, window regulator, and weather molding for further wear that may need attention.
6. **Mismatched Colors** Some aftermarket strips may not perfectly match the original color, though this is usually minor unless the car is restored.
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### **Conclusion**
Replacing the door chassis weather strip (part #306) on a 2002-2005 Honda Civic Si EP3 hatchback is a **highly recommended maintenance task** for both functional and aesthetic reasons. The benefits better weather sealing, reduced noise, and prevention of long-term damage far outweigh the minor drawbacks, which are mostly related to installation effort or part quality. If possible, opt for a **high-quality aftermarket or OEM-equivalent strip** to ensure longevity. Proper installation with clean surfaces and appropriate adhesive will maximize effectiveness.
### **Recommendation:**- **Buy the part** (preferably from a reputable supplier like RockAuto, Amazon, or a trusted local auto parts store).
- **Inspect the door panel** for rust or damage before installation.
- **Follow installation instructions carefully**, using a pry tool to remove the old strip and adhesive cleaner if needed.
- **Apply a high-quality adhesive** (such as 3M 5200 or Permatex Ultra Seal) to ensure a secure fit.
- **Test the seal** after installation by closing the door firmly and checking for gaps with a flashlight.
This upgrade is a **simple, low-cost preventative measure** that will keep your Civic Si running smoothly and looking its best for years to come.