AUDI 8W6807521C Rear Bumper Lower Cover Diffuser 2018-2019S

( Manufacturer Part Number: 8W6807521C ), ( Part Type: Cover Bumper ), ( Material: Plastic ), ( Universal Fitment: No ), ( Finish: Textured ), ( Placement On Vehicle: Rear, Lower ), ( Country Of Origin: Germany )

Review AUDI Rear Bumper Lower Cover Diffuser Oem fits A5 S5 2018–2019

The **Audi 8W6807521C Rear Bumper Lower Cover/Diffuser** for the **2018 2019 Audi A5 and S5 models** is a precision-engineered component designed to seamlessly integrate with the vehicle s sleek, aerodynamic rear profile while enhancing both functionality and styling. Crafted from high-quality, durable materials, this lower cover diffuser serves as more than just an aesthetic accent it plays a critical role in optimizing airflow beneath the bumper, contributing to improved cooling efficiency for the brake system and exhaust components. The design features a smooth, contoured surface that complements Audi s signature aggressive yet refined styling cues, ensuring a perfect fit with the factory-installed rear bumper assembly. Engineered with meticulous attention to detail, the cover includes precise mounting points and alignment guides to guarantee a flawless installation, minimizing gaps and ensuring a seamless, factory-like appearance. Whether installed on a standard A5 or the high-performance S5, this component upholds Audi s commitment to precision engineering, delivering both form and function in equal measure. Built to withstand the rigors of daily driving, including exposure to road debris, weather elements, and minor impacts, the 8W6807521C is a reliable upgrade or replacement part that maintains the vehicle s original integrity while enhancing its visual appeal.

### **Pros and Cons of buying a Audi 8W6807521C (2018-2019 A5 S5 Rear Bumper Lower Cover/Diffuser)**

1. **OEM Quality and Fit** This part is an original Audi component, meaning it is designed to match the exact specifications of your vehicle. It ensures a proper fit without gaps or misalignment, which is critical for both aesthetics and functionality.

2. **Durability and Longevity** Audi parts are built to last, especially when sourced from authorized dealers or reputable suppliers. The lower cover/diffuser is made from high-quality materials, such as reinforced plastic or composite, which can withstand minor impacts and environmental wear better than aftermarket alternatives.

3. **Maintained Resale Value** Using genuine Audi parts helps preserve the vehicle s value, especially if you plan to sell or trade it in the future. Potential buyers often prefer cars with original components.

4. **Warranty Coverage** If purchased from an authorized Audi dealer or a supplier with a warranty, you may still receive some form of protection, depending on the seller s policies. This can be beneficial if the part fails prematurely.

5. **Aesthetic Consistency** The part is designed to match the factory look of your A5 S5, ensuring that the rear diffuser blends seamlessly with the rest of the bumper and bodywork. This is particularly important for enthusiasts who value the car s appearance.

6. **Potential Performance Benefits** While the primary function of the lower cover/diffuser is aesthetic, it may also play a minor role in aerodynamics by reducing drag or improving downforce at high speeds. A properly fitted part ensures optimal airflow.

7. **Easier Installation** Since it is an OEM part, it should come with all necessary hardware and instructions, making installation straightforward compared to some aftermarket alternatives that may require additional modifications.

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1. **High Cost** Genuine Audi parts are significantly more expensive than aftermarket alternatives. The 8W6807521C part alone can cost between **$300 $600**, depending on the supplier, labor costs, and whether you purchase it new or used/refurbished.

2. **Limited Availability** Finding this specific part may require ordering from an Audi dealer, a specialty parts distributor, or an online marketplace (e.g., RockAuto, eBay, or Audi-specific suppliers). Availability can be inconsistent, especially for older model years.

3. **Potential for Counterfeit Parts** If purchasing from unverified sellers (e.g., third-party online marketplaces), there is a risk of receiving a **counterfeit or low-quality replica**. Always verify the seller s reputation and part authenticity.

4. **Longer Lead Times** Unlike aftermarket parts that may ship within days, OEM Audi parts can take **weeks** to arrive, especially if ordered directly from the manufacturer or a dealer.

5. **Overkill for Minor Damage** If the current diffuser is only slightly damaged (e.g., a small crack or minor cosmetic flaw), replacing it with an OEM part may be unnecessary. In such cases, a **direct-fit aftermarket replacement** or even a **repair kit** could be a more cost-effective solution.

6. **Installation Challenges** While the part itself fits well, installation may require **special tools, adhesives, or professional labor**, especially if the existing part is corroded or poorly attached. DIYers may need to invest time or money in professional help.

7. **Environmental and Ethical Concerns** Purchasing new OEM parts contributes to **waste and resource consumption**, whereas refurbished or aftermarket parts (if high-quality) can be a more sustainable option.

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### **Conclusion**

- You prioritize **authenticity, durability, and resale value**.

- The part is **completely damaged or missing**, making an aftermarket replacement insufficient.

- You have the **budget** and are willing to wait for the part.

- You value **aesthetic perfection** and want the car to look factory-fresh.

- The damage is **minor and cosmetic**, consider **aftermarket alternatives or repair kits**.

- You are on a **tight budget**, explore **refurbished OEM parts** or **high-quality aftermarket options** (e.g., **ABS, Dura, or Audi-specific brands** like **Meguiar s or 3M** for repairs).

- You need the part **quickly**, aftermarket suppliers may be a faster (though less premium) option.

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### **Recommendation**

- Purchase from an **authorized Audi dealer** or a **trusted online supplier** (e.g., **AudiPartsOnline, RockAuto, or eBay with verified sellers**).

- Ensure the part is **new and in stock** to avoid long wait times.

- Consider **professional installation** if you lack experience with Audi bodywork.

- Look for a **direct-fit aftermarket replacement** (e.g., **ABS, Dura, or Audi Parts Direct**) that matches the OEM part closely.

- Check reviews for **fitment and durability** before purchasing.

- If the damage is minor, a **bumper repair kit** (e.g., **3M or Body Armor**) may suffice.

- Opt for a **refurbished OEM part** (if available) or a **high-end aftermarket option** that guarantees a perfect fit.

- Ensure the seller provides **warranty or return policies** in case of defects.

For **complete replacement with maximum authenticity**, the **8W6807521C is the best choice**, but it comes at a premium. For **cost-conscious buyers**, carefully selected aftermarket parts can offer a **near-OEM experience** without the high cost. Always **verify the seller s reputation** and **check for authenticity** to avoid counterfeit parts.

Details:

part #: 8w6807521c prices

• $99.99-$180.00

specifications vintagecarbumperus:

• for models: A5, S5
• for makes: Audi
• for years: 2018-2019
• mpn: 8w6807521c
• part type: Cover Bumper
• material: Plastic
• universal fitment: No
• finish: Textured
• placement on vehicle: Rear, Lower
• country of origin: Germany

seller vintagecarbumperus:

• # reviews: 57
• city: Des Plaines, Illinois
• rating: 97.1%

payments vintagecarbumperus:

• wallet: Apple-pay
• credit card: Discover
• other

returns vintagecarbumperus:

• paid by: Seller
• policy: Returns Accepted
• time: 30 Days

shipping vintagecarbumperus:

• carrier: USPS, UPS, FedEx
• class: Standard, Economy
• cost: $0.00
• transit: 4-10 Days
• service: USPS Ground Advantage, UPS Ground Saver, FedEx Ground Economy
• type: Calculated

offer vintagecarbumperus:

• sold: 0
• options: Ship-to-home
• quantity: 1
• best offers: True
• started: May 3, 2026
• availability: In Stock

general vintagecarbumperus:

• condition: Used
• Exterior Parts Accessories > Bumpers Components > Bumper Inserts Covers

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