fits model: A3, S3. make: Audi. year: 2015–2020.

( Manufacturer Part Number: 8V5839431D ), ( Color: Black ), ( Material: Rubber ), ( Vintage Part: No ), ( Placement On Vehicle: Left, Rear ), ( Type: Window Run Channel ), ( Manufacturer Warranty: 1 Month ), ( Features: Waterproof ), ( Finish: Matte ), ( Country Of Origin: Germany )
The **Audi 8V5839431D rear left door glass channel weatherstrip seal** for the **2015 2020 A3 and S3 models** is a precision-engineered rubber and polyurethane composite component designed to ensure optimal sealing, noise reduction, and weather protection within the vehicle s door assembly. This high-quality aftermarket replacement is meticulously crafted to match the original equipment manufacturer (OEM) specifications, featuring a durable **EPDM (ethylene propylene diene monomer) rubber compound** reinforced with a robust polyurethane core for enhanced durability and flexibility. The seal is engineered to conform seamlessly to the door s glass channel, preventing drafts, road noise, and moisture intrusion while maintaining a tight, airtight fit even under varying temperature conditions. Its sleek, aerodynamic design integrates smoothly with the door s contour, ensuring a clean, factory-like appearance while providing long-lasting protection against wind, rain, and debris. Ideal for both DIY enthusiasts and professional installers, this weatherstrip seal is a straightforward yet critical upgrade for maintaining the Audi s signature blend of performance and refinement, helping to preserve the vehicle s resale value and driving comfort. Whether addressing wear from daily use or replacing a damaged seal, this part is a reliable choice for Audi owners seeking a perfect balance of functionality and longevity.
### Pros and Cons of Buying a Replacement Rear Left Door Glass Channel Weatherstrip Seal for a 2015-2020 Audi A3 (V5839431D)
#### **Pros:**1. **Improved Weather Sealing** A worn or damaged weatherstrip seal can allow water, dust, and debris to enter the cabin, leading to condensation, mold, and unpleasant odors. Replacing it ensures a tighter seal, protecting the interior from moisture and contaminants.
2. **Enhanced Comfort and Quietness** A properly functioning weatherstrip reduces wind noise and drafts, making the driving experience more comfortable, especially at higher speeds or in open windows.
3. **Prevents Long-Term Damage** Moisture seeping into door panels can cause rust, electrical issues (e.g., faulty window regulators), or deterioration of interior materials. Replacing the seal proactively avoids costly repairs down the line.
4. **Maintains Resale Value** A well-maintained Audi with intact weatherstrips and no signs of water damage retains better resale value compared to one with visible wear or rust.
5. **Easy Installation** Weatherstrips are relatively straightforward to replace, especially if you have basic mechanical skills. Many owners or even dealerships can install it without specialized tools.
6. **Cost-Effective Solution** Replacing a single weatherstrip is significantly cheaper than repairing water-damaged components (e.g., door panels, wiring harnesses, or headliners).
7. **OEM Quality (If Purchasing Original Parts)** Audi s original equipment manufacturer (OEM) parts are designed to match the vehicle s specifications, ensuring a proper fit and longevity.
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#### **Cons:**1. **Potential for Counterfeit or Low-Quality Parts** If purchasing from a non-Audi-approved source, there s a risk of receiving substandard or incompatible parts that may wear out quickly or fail to seal properly.
2. **Time-Consuming Installation** While not overly difficult, removing the old seal, cleaning the channel, and properly installing the new one requires patience. Rust or adhesive buildup may complicate the process.
3. **Limited Availability of OEM Parts** OEM weatherstrips (e.g., from Audi or authorized dealers) may be harder to find or more expensive than aftermarket alternatives. Pricing can vary significantly depending on the source.
4. **Possible Additional Wear** If the door mechanism (e.g., window regulator, hinges) is already worn, replacing just the weatherstrip may not fully resolve drafts or noise issues. A more comprehensive inspection might be needed.
5. **Cost of Aftermarket vs. OEM** Aftermarket parts are often cheaper but may not last as long or fit as precisely. OEM parts are more expensive but offer better reliability and compatibility.
6. **Risk of Overlooking Underlying Issues** If the seal fails due to an underlying problem (e.g., misaligned door, damaged channel), replacing just the seal without addressing the root cause may lead to repeated failures.
7. **Professional Installation Fees** If you choose to have a dealer or mechanic install the part, labor costs (typically $50 $150) will add to the total expense.
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### **Conclusion:**Replacing the rear left door glass channel weatherstrip seal on a 2015 2020 Audi A3 is a **practical and cost-effective preventive maintenance task** that addresses immediate issues like drafts, water ingress, and noise while protecting long-term vehicle integrity. The benefits such as improved comfort, reduced moisture damage, and maintained resale value far outweigh the minor drawbacks, provided you source a **high-quality, compatible part** and ensure proper installation.
The **primary risks** stem from purchasing inferior parts or overlooking related wear in the door system. However, these can be mitigated by:- Buying from a **reputable supplier** (e.g., Audi-approved parts, trusted aftermarket brands like Dayco or Gates, or eBay with seller verification).
- **Inspecting the door channel** for damage or misalignment before installation.
- **Following manufacturer guidelines** for installation to ensure a proper seal.
For most owners, the **effort and cost are justified**, especially if the seal is visibly worn or if you ve already noticed drafts or water leaks. If you re unsure about installation, consulting a mechanic or Audi specialist can provide peace of mind.
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### **Recommendation:**1. **Prioritize Quality Over Price** Opt for an **OEM Audi part** (e.g., V5839431D) or a **high-grade aftermarket alternative** (e.g., Dayco or Gates) to ensure durability and a proper fit. Avoid generic or unknown brands that may fail prematurely.
2. **Source from Trusted Vendors**
- **Audi Dealerships or Authorized Parts Stores** (most reliable but pricier).
- **Specialized Online Retailers** (e.g., RockAuto, PartsGeek, or eBay with positive reviews and seller ratings).
- **Local Audi Clubs or Forums** (members often share recommendations for reliable suppliers).
3. **Prepare for Installation**
- Gather tools: plastic pry tools, adhesive remover (if needed), cleaning supplies (e.g., brake cleaner), and a new seal.
- Watch **YouTube tutorials** specific to your Audi model for step-by-step guidance.
- Consider **disassembling the door** if the channel is heavily corroded or misaligned.
4. **Budget Accordingly**
- **OEM Part Cost:** $50 $100 (varies by supplier).
- **Aftermarket Part Cost:** $20 $60 (Dayco/Gates are mid-range; budget brands may be cheaper but riskier).
- **Labor Cost (if outsourced):** $50 $150.
5. **Address Underlying Issues** If drafts persist after replacement, inspect the **door hinges, window regulator, or seal channel** for wear. A professional inspection may be warranted if the problem recurs.
6. **Maintain Regularly** Weatherstrips degrade over time, so **inspect them annually** (especially before winter) and replace as needed to prevent long-term damage.
**Final Verdict:** **Worth the investment** for any Audi A3 owner experiencing drafts, water leaks, or visible wear in the rear left door seal. The long-term protection against rust, electrical issues, and discomfort makes it a **smart preventive measure**.
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Mileage: 42,156k milieus. Fuel Type: Gasoline. Left-Hand Drive Vehicles: All vehicles and parts are for left-hand drive unless specified otherwise in the listing. Left refers to the driver side, and Right passenger side from drivers perspective.
Contact phone number. Condition: GOOD. Wheel Drive: 4x4 All Drive. Part Detail: Type: USED.
Made for USA Vehicles: All parts are vehicles manufactured the market. Recipients name first and last. Model: Audi A3 S-LINE. 2015 2020 AUDI A3 S3 REAR LEFT SIDE DOOR GLASS RUN CHANNEL WEATHERSTRIP SEAL OEM Vehicle Detail.