BMW F80 M3 F82 F83 M4 2014-2020 Rear Bumper Diffuser With Brake Light Carbon Fiber
Available in stock (20)
Carbon Fiber Rear Bumper Diffuser with Integrated Brake Light for 2014-2020 BMW M3 F80 / M4 F82 F83
A rear diffuser built to match the F80/F82/F83's motorsport pedigree. Crafted from genuine 3×3 twill weave carbon fiber, this direct-replacement diffuser integrates a brake light for a seamless, track-inspired rear treatment — no cutting, no modification to factory mounting points. Choose from carbon fiber, glossy black FRP, or a discounted carbon fiber option with minor cosmetic imperfections.
Available Materials
- Carbon Fiber ($460.99): Genuine 3×3 twill weave carbon fiber with UV-resistant high-gloss clear coat — premium finish, full quality guarantee.
- Glossy Black FRP ($360.99): Fiberglass-reinforced plastic with deep gloss black finish — same fitment and brake light integration at a lower price point. Ideal for future wrapping or painting.
- Carbon Fiber — Small Flaw ($299.99): Same genuine carbon fiber construction with minor cosmetic imperfections (e.g., slight surface variation) not visible at normal viewing distance. Structurally identical. Great value for performance-first builds.
Key Features
- Integrated Brake Light: Factory-style third brake light is built into the diffuser design — fully functional, no wiring modification required for OEM-compatible connection.
- Direct OEM Replacement: Unbolt the factory plastic diffuser, mount this unit using the included self-tapping screws — no cutting, no modification. Professional installation recommended.
- Genuine 3×3 Carbon Fiber (CF variant): Premium twill weave carbon fiber with double-layer UV-resistant clear coat — matches any existing carbon fiber parts on your M3/M4 for a cohesive build.
- Vehicle-Specific Fitment: CNC-moulded and real-car tested for 2014–2020 BMW F80 M3 Sedan, F82 M4 Coupe, and F83 M4 Convertible — guaranteed OEM-compatible fit.
- UV-Protected Finish: Double-layer anti-UV clear coat (CF and FRP variants) resists fading, yellowing, and surface hazing over time.
- Export-Grade Packaging: Multi-layer shockproof export carton ensures safe delivery across international shipping routes.
Product Specifications
| Feature | Details |
|---|---|
| Material Options | Carbon Fiber (3×3 Twill) / Glossy Black FRP / CF Small Flaw |
| Brake Light | Integrated, OEM-Compatible Wiring |
| Fitment | 2014–2020 BMW F80 M3 Sedan / F82 M4 Coupe / F83 M4 Convertible |
| Installation | Direct Replacement, Self-Tapping Screws Included |
| Finish | Double-Layer UV-Protected Clear Coat (CF & FRP) |
| Weight | ~5,000 g |
Shipping & After-Sales
- US & EU local warehouse stock available for fast dispatch on best-selling variants
- 30-day returns on unused items
- Damaged on arrival? Free replacement or full refund within 72 hours
- Engineer support available for fitment and variant selection before ordering
- 1-Year Factory Warranty & global after-sales support
Note: Fits F80 M3, F82 M4 Coupe, and F83 M4 Convertible only. Not compatible with standard 3 or 4 Series non-M variants. Send us your car photos to confirm fitment if unsure. Professional installation is recommended for brake light wiring.
Complete your M3/M4's rear end with a diffuser that earns a second look — select your material and add to cart now.
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Stephanie L.
Ordered the BMW front bumper fog light grille and the fitment was absolutely perfect. Gloss black finish looks factory-fresh and the quality is outstanding. Installation took about 30 minutes — no drilling required. Highly recommend AlchemyRide!
Marcus R.
Fast shipping, great packaging, and the part arrived in perfect condition. The grille fits my F23 like a glove — exactly as described. Customer service was also super responsive when I had a fitment question. Will definitely order again.
David K.
I've bought aftermarket parts from many stores but AlchemyRide stands out for quality and value. The part was well-made, fit perfectly, and the price was very competitive. My BMW looks aggressive and clean — exactly what I wanted.
Jenny T.
Excellent product and super easy to install. The gloss black finish matches my M Sport bumpers perfectly. Shipping was faster than expected and the part was well-packaged. Very happy with my purchase — my car looks completely transformed!