Mercedes-Benz AMG A45 W177 / V177 (2018+) Prepreg Dry Carbon Fiber Rear Diffuser

Engineered for Mercedes-AMG A45 W177 (hatch) and V177 (sedan) (2018+) owners who demand racing-grade quality, this Prepreg Dry Carbon Fiber Rear Diffuser transforms the rear of your hot-hatch or sedan with track-grade aggression while sharpening its aerodynamic character. Manufactured in Europe and quality-controlled by BYC Performance, this W177/V177 carbon rear diffuser bolts directly to OEM mounting points.

If your A45 W177 tuning or V177 sedan tuning project demands a part that exceeds the factory plastic diffuser, this dry carbon rear diffuser is built for you. The W177-gen A45 AMG runs the world's most powerful production 4-cylinder: the M139 2.0L turbo (387-421 hp S trim) — your rear diffuser should match.

Key Features

• Prepreg Dry Carbon Technology: Cured in an autoclave under high heat and pressure; a more consistent weave.
• Aggressive Diffuser Geometry: AMG GT3-inspired multi-fin diffuser design. Noticeably lighter than the factory plastic part.
• High Strength: Carbon fiber offers very high strength for its weight.
• Aerodynamic Performance: Optimized diffuser channels accelerate underbody airflow.
• 2x2 Twill Carbon Weave: Under a high-gloss UV-protective clear coat.
• Cross-Body Fit: Plug & play on both W177 hatchback and V177 sedan rear bumper mounts.
• UV & Chemical Protection: Long-life clear coat resists fading, cracking, fuel splash.

Prepreg Dry Carbon vs. Wet Carbon

• Cured in an autoclave under high heat and pressure → a more consistent weave
• A controlled resin ratio → lighter and stronger
• The production method widely chosen in motorsport
• Minimal UV fading over years of use

Vehicle Fitment

• Mercedes-AMG A45 W177 hatchback (2018-2024) — M139 2.0L Turbo (387-421 hp)
• Mercedes-AMG A45 V177 sedan (2018-2024) — M139 2.0L Turbo
• Mercedes-AMG A35 W177/V177 (2018+) — M260 2.0L Turbo (306 hp)
• Mercedes-Benz A-class W177/V177 AMG-Line trim (AMG-package rear bumper)

Important notes:

• This product is NOT compatible with the W176 (A-class 2012-2018). W176 has different rear bumper geometry.
• Standard (non-AMG-Line) A-class W177/V177 rear bumpers cannot be guaranteed fitment.

Technical Specifications

• Material: Prepreg Carbon Fiber (2x2 Twill Weave)
• Manufacturing: Autoclave Cure
• Finish: High-Gloss Clear UV-Protective Resin
• Origin: Europe

Installation Notes

1. Raise the vehicle and remove rear bumper underbody screws.
2. Detach the OEM plastic diffuser from clips and bolts.
3. Test-fit the carbon diffuser for alignment.
4. Secure with supplied hardware to the manufacturer's recommended torque.
5. Verify exhaust tips are centered in diffuser cutouts.

Care & Maintenance

Wash with pH-neutral car shampoo. Apply carbon-safe sealant every 6 months.

FAQ

Compatible with W176?
No. W176 has different rear bumper and diffuser geometry.

Does it fit both W177 hatch and V177 sedan?
Yes. Both bodies share the same rear bumper and diffuser mounting points.

Difference between A35 and A45?
No fitment difference. Both share the same W177/V177 chassis and AMG-package rear bumper.

Compatible with standard A-class?
Only AMG-Line rear bumper models.

Shipping time?
In-stock items ship within 1-3 business days. International shipping available.

Warranty?
BYC Performance 12-month warranty.

Why BYC Performance?

BYC Performance is a Turkey-based performance tuning specialist sourcing premium carbon fiber parts from leading European manufacturers.