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2020-2024 For Audi A4/S4 Sline Rear Diffuser with LED-Black/Carbon Look

$499.99
$499.99
Sale Sold out
Shipping calculated at checkout.
COLOR: GLOSS BLACK
Only 5 units left

⚡️Transform Your Audi A4/S4 Sline with an Aggressive Rear End
If you drive a 2020-2024 Audi A4 Sline or Audi S4, you already know these models carry a sporty pedigree. But let's be honest—the factory rear bumper lacks that final punch. The rear diffuser with LED is the upgrade that completes the look, giving your Audi a track-inspired stance while improving rear-end aerodynamics.

Whether you choose the stealthy gloss black finish or the premium carbon fiber pattern, this Audi A4 S4 Sline rear diffuser is engineered to integrate seamlessly with your vehicle's existing lines—no cutting, no drilling, no compromise.

Why Upgrade to a Rear Diffuser with LED?
Upgrading your rear diffuser isn't just about aesthetics—though the visual transformation is undeniable. Here's why this mod makes sense:
Aggressive Styling: The diffuser replaces the bland factory valance with a dynamic, motorsport-inspired design that turns heads.
LED Integration: Built-in LED brake light or running lights add a modern, high-end look while improving rear visibility and safety.
Aerodynamic Benefit: The diffuser shape manages rear airflow, reducing lift and improving stability at higher speeds.
Lightweight Performance: Carbon fiber pattern diffuser options shed weight compared to OEM plastic, while still offering exceptional durability.

This Part Fits the Following Vehicles

Make Gen Year Model
AUDI B9.5 2020-2024 A4
AUDI B9.5 2020-2024 S4
Note: This diffuser does NOT fit real RS4s.

Installation – What to Expect
Professional installation is strongly recommended, but the diffuser is designed for a straightforward bolt-on fit using factory mounting points.

Installation Overview:
Remove rear bumper from the vehicle (required for proper access).
Detach existing valance from the bumper cover.
Align new diffuser with factory mounting tabs and secure using provided hardware or clips.
Connect LED wiring (if applicable) and test lights before reassembly.
Reattach rear bumper and double-check all fittings.

Other attributes

Condition New
Material ABS & Stainless Steel
Product Type Rear Diffuser Kit for Audi A4/S4 B9.5
Installation Direct Fit (No Modifications Required)
Items Included Other mounting hardware
Single package size 168*20*48 cm
Single gross weight 6.000 kg

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  • Shipping & Delivery
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  • FAQ

US orders

Delivery range: 48 states (excluding Alaska, Hawaii, Puerto Rico, military addresses, etc.) and Canada, etc.

Delivery method: FedEx/UPS/DHL free delivery, no PO boxes.

Time limit: depends on the region.

Free shipping within the continental US !

International orders

Cost: Shipping + tariffs are calculated separately, please contact customer service for confirmation（The transportation time is subject to the shipping standards of the Chinese warehouse）.

Logistics: FedEx/UPS/POST/DHL, etc.

Standard products

Shipment from US warehouse: shipped on the second working day after order confirmation, and delivered in 2-5 working days.

Shipment from China warehouse: shipped 2-5 working days after order confirmation, and expected to be delivered in 7-10 working days.

International orders: The time limit refers to the China warehouse standard, and the specific details need to be confirmed with customer service.

Special products

Large items (such as rims): only support sea transportation, and the transportation cycle is about 25-45 days.

Customized carbon fiber products:

Production cycle: need to be confirmed after purchase.

Transportation method: choose air transportation (total cycle 10-15 days) or sea transportation (total cycle 25-35 days) according to size.

Cancellation Policy

  • Orders can be canceled free of charge within 24 hours of placement. Refunds will be processed to the original payment method within 3-5 business days.

 

Return Policy

Timeframe

  • 14-Day Returns: Returns are accepted within 14 days of delivery. No returns/exchanges permitted after this period.
  • Customized Products: Non-returnable.

Eligibility

  • Items must be unused, undamaged, and in their original packaging with all accessories.
  • A valid proof of purchase (receipt/order confirmation) is required.
  • Returns must use the official return label provided by us.

Process

  1. Contact customer service at support@elitegermanparts.com to request a return label.
  2. Sign the inspection form upon return delivery.
  3. Report damages within 24 hours of signing. After this period, the product is assumed to be in good condition.

Cost Responsibilities

  • Customers cover round-trip shipping costs for non-defective returns.
  • Non-U.S. Customers: Must pay international shipping fees to return items to China (may be expensive).

Q1: Why do the products displayed in the store not include complete accessories?
A: The products displayed in our store do not include complete accessories. When you purchase the product, we will give you the required accessories. The accessories may be mailed with the product in 1 or 2 packages. We will provide you with the corresponding package tracking number so that you can check the logistics information in real time.

Q2: The package received is damaged, but it does not affect the installation and appearance. What should I do?
A: If the package is damaged but does not affect the installation and appearance of the product, in order to reduce your after-sales time, we will apply for part of the compensation for you. You do not need to send back the damaged package, just keep the package and the product. We will have a dedicated after-sales staff to communicate with you about compensation matters to ensure that your rights and interests are protected.


Q3: What should I do if the package is damaged and affects the installation of the product?
A: If the package is damaged and affects the installation of the product, you can rest assured that we will re-mail you a new product free of charge. Please provide photos of the damage within 24 hours after receiving the package. The photos must include the outer packaging of the package with the tracking number so that we can accurately verify the situation. We will assist you in applying for compensation from the courier and handle related matters for you throughout the process. You only need to wait patiently for the delivery of the new package.


Q4: Is the product guaranteed to be compatible?
A: All products have passed market verification and we guarantee the adaptability of the products. During the design and production process, we have undergone rigorous testing and verification of actual scenarios.


Q5: What should I do if there is incompatibility during installation?
A: If there is incompatibility during the installation process, please contact our customer service team in time. We have rich installation experience and will provide you with detailed solutions and technical support based on the specific problems you encounter to help you solve the problems in the installation process and enable the product to be installed and used smoothly.


If you have other questions or questions during the shopping process, please feel free to contact us by email at support@elitegermanparts.com, we will serve you wholeheartedly!