2021-2025 Audi RS5 Fender: Wide-Body Fitment and Replacement Guide
This guide covers the critical differences between RS5, S5, and A5 fenders, what to inspect on a used part, and how to manage replacement costs.
- The single most critical fact is that RS5 fenders are wider than A5/S5 fenders and are not interchangeable.
- When buying a used fender, prioritize one with no previous repairs and all mounting tabs intact.
- A used, color-matched fender is often the most cost-effective option, but professional paint blending may still be needed for a perfect match.
- Replacement is a bolt-on process, but requires removing the wheel, liner, and loosening the bumper cover for access.
Symptoms of a Damaged Fender
Unlike mechanical parts, fender failure is purely physical and visual. Damage typically comes from collisions, road debris, or rust. Here’s what to look for:
- Dents and Dings: The most common issue, caused by impacts from other car doors, shopping carts, or minor collisions.
- Cracks or Tears: Severe impacts can crack or tear the fender material. This is a serious issue that compromises the panel's structural integrity.
- Scratches and Scuffs: Damage to the paint and clear coat, which can be cosmetic or deep enough to expose the metal underneath, leading to rust.
- Poor Panel Gaps: Uneven gaps between the fender, hood, door, and bumper can indicate a previous poor-quality repair or underlying structural misalignment from an accident.
- Rust or Corrosion: If the paint is compromised, the underlying metal (often aluminum on modern Audis) can corrode. Look for bubbling paint or white, powdery residue.
Warning: The 2021-2025 Audi RS5 has wider, flared fenders that are NOT interchangeable with those from a standard Audi A5 or S5. Attempting to install an A5/S5 fender on an RS5 will result in improper fitment, misaligned body lines, and potential tire rubbing issues.
Buying a Used 2021-2025 RS5 Fender: What to Check
A used OEM (Original Equipment Manufacturer) fender is often the best choice for fit and quality, as it was made by Audi for your specific vehicle. However, careful inspection is critical before buying.
On-Vehicle Inspection (If Possible)
- Check Panel Gaps: Look for consistent, even spacing between the fender and the hood, front door, and bumper cover. Tight or wide gaps suggest the car may have had a collision.
- Look for Paint Mismatches: View the fender from different angles and in different lighting. A difference in color, gloss, or texture compared to the door and hood indicates it has been repainted.
- Use a Magnet (on steel parts): While many modern Audi panels are aluminum, a small magnet can help detect thick layers of body filler (Bondo) on any steel areas, which is a sign of a hidden repair.
Off-Vehicle Inspection (Most Common for Recycled Parts)
- Inspect All Mounting Points: Carefully check every tab, bracket, and bolt hole. These are often made of plastic or thin metal and can easily crack or break during removal. A fender with broken tabs will not sit securely.
- Look for Hidden Cracks: Flex the fender slightly (if the material allows) and inspect areas around mounting holes and sharp body lines for hairline cracks that may not be immediately visible.
- Check the Backside for Repairs: The back of the fender tells the real story. Look for signs of body filler, sanding marks, or overspray that prove the part has been repaired before. A quality used part should have the original factory finish on the inside.
- Verify the Part Number: If possible, match the part number stamped on the fender to the known OEM numbers for your vehicle to ensure you are buying the correct RS5-specific part.
Pro Tip: When buying a used fender, prioritize one that is the same color as your vehicle, even if it has minor scratches. The cost of minor paint correction is often far less than the cost of a full repaint and color-blending for a mismatched panel.
Known Issues, Recalls, and Service Bulletins
As of mid-2024, there are no recalls or Technical Service Bulletins (TSBs) from the National Highway Traffic Safety Administration (NHTSA) that specifically address the fenders on the 2021-2025 Audi RS5. Most recalls for this vehicle concern the electrical system, rear axle, or airbags. Fender issues are almost always related to external damage rather than a manufacturing defect.
Replacement Overview and Difficulty
Replacing the front fender on an Audi RS5 is a moderately difficult task. While it is a bolt-on panel, achieving perfect alignment requires patience and precision. The process generally involves:
- Removing the front wheel.
- Removing the plastic fender liner.
- Partially removing or loosening the front bumper cover to access bolts.
- Disconnecting the side marker light wiring harness.
- Unbolting the fender from the chassis at the top (under the hood), front (near the bumper), and rear (by the door hinge).
- Transferring the side vent and any other hardware from the old fender to the new one.
- Installing the new fender, leaving bolts loose for final alignment before tightening.
A professional body shop is recommended for those unfamiliar with body panel alignment to ensure perfect gaps.
Cost Comparison
Prices can vary significantly based on location, condition, and the need for painting.
| Part/Service | Estimated Cost | Notes |
|---|---|---|
| New OEM Fender (Unpainted) | $650 - $800 | Genuine Audi part from a dealer. Guarantees perfect fitment. |
| New Aftermarket Fender | $250 - $400 | Often CAPA certified, but fitment can sometimes be less precise than OEM. Not as common for RS5-specific parts. |
| Used OEM Fender | $400 - $750+ | Price depends heavily on condition and color. A color-matched fender in good condition can be a great value. |
| Shop Labor (Installation) | $200 - $400 | Labor to remove the old fender and install the new one, not including paint. |
| Shop Labor (Paint) | $400 - $900+ | Cost to paint a new fender and blend the color into the adjacent door and hood for a perfect match. |
Frequently Asked Questions (FAQ)
Will a fender from an Audi A5 or S5 fit my RS5?
No. The RS5 has a wide-body design, and its fenders are flared 15mm wider than those on an A5 or S5. You must use a fender specifically designed for the RS5 to ensure proper fit and tire clearance.
Is the front fender on the Coupe, Convertible, and Sportback the same?
Yes, for the B9 generation (2017+), the front fenders are generally interchangeable between the Coupe, Convertible, and Sportback models within the same performance line (e.g., all RS5 models). However, it is always best to verify fitment using a VIN or specific part number.
What material are the RS5 fenders made of?
While many aftermarket options are carbon fiber or fiberglass, original OEM Audi fenders are typically made of aluminum or steel for this model generation. This requires specific repair techniques if damaged, and aluminum cannot be repaired with the same methods as steel.
If I buy a used fender of the same color, will it match perfectly?
Not always. Sun exposure can cause paint to fade slightly over time. Even with the same paint code, a fender from a different car may have a subtle difference in shade. For a perfect, show-quality finish, a body shop will often blend the new paint into the adjacent door and hood panel to make any difference invisible.
OEM Part Numbers
The following are known OEM part numbers for the 2021-2025 Audi RS5 front fenders. The final letter often indicates a revision, but parts are generally interchangeable. Always confirm fitment with the seller using your vehicle's VIN.
- Left (Driver's Side): 8W6-821-105-B, 8W6821105B, 8W6821105C
- Right (Passenger's Side): 8W6-821-106-C, 8W6821106C, 8W6821106D
Note: These part numbers are also listed for A5 and S5 models by some vendors, but the physical part for the RS5 is distinct due to the wider flare. This highlights the importance of verifying the part is specifically from an RS5 donor vehicle.
Technical Specifications
OEM Part Numbers: 8W6-821-105-B 8W6-821-106-C 8W6821105B 8W6821105C 8W6821106C 8W6821106D
Material: OEM is typically aluminum or steel. Flare Width: 15mm (0.6 inches) wider than standard A5/S5 models.
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Audi RS5:
- Symptoms of a Damaged Fender
- Buying a Used 2021-2025 RS5 Fender: What to Check
- On-Vehicle Inspection (If Possible)
- Off-Vehicle Inspection (Most Common for Recycled Parts)
- Known Issues, Recalls, and Service Bulletins
- Replacement Overview and Difficulty
- Cost Comparison
- Frequently Asked Questions (FAQ)
- OEM Part Numbers
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