BMW 4 Series F32 F36 428i Upgrade To 2021 M4 Style Rear Bumper Kit（2014-2020）
Fitment & Compatibility
Designed for BMW 4 Series F32/F33/F36 models, this rear bumper conversion kit upgrades the factory rear styling to a more aggressive M4-inspired appearance.
Compatible with:
- 2014-2020 BMW 4 Series F32 Coupe
- 2014-2020 BMW 4 Series F33 Convertible
- 2014-2020 BMW 4 Series F36 Gran Coupe
- BMW 420i / 428i / 430i / 435i / 440i models
This rear bumper kit is developed as an exterior facelift upgrade, providing an M4-style rear appearance while maintaining OEM-style mounting locations for easier installation.
Please provide your VIN and original vehicle photos before purchase if you are unsure about compatibility.
Material & Finish
Constructed from high-quality polypropylene (PP) and ABS materials, this rear bumper is designed for durability, flexibility, and reliable long-term use.
Features include:
- Premium PP material for enhanced strength and impact resistance
- OEM-inspired design for a factory-style appearance
- Unpainted finish, ready for professional preparation and painting
- Designed for bolt-on installation with minimal modification required
Included Components
This package includes:
- Rear bumper assembly
Package contents are based on the product images. Installation instructions are not included.
Installation & Professional Requirements
We highly recommend professional installation for all body kit products.
Before painting or final installation, a full test fit is required to ensure proper alignment and fitment. This step is essential, as painted parts are considered modified and may not be eligible for return.
Important Notes:
Do not paint the item before test fitting
Minor adjustments, sanding, or trimming may be required for optimal fitment
Professional body shop installation is strongly recommended
Installation instructions are not included
If you are unsure about fitment, please contact us with your VIN before installation.
Design & Development Philosophy
Inspired by the latest BMW M4 performance styling, this rear bumper conversion is designed to give the BMW 4 Series a sharper and more dynamic rear profile.
The design focuses on improving the vehicle’s visual stance through more aggressive lines, a sportier appearance, and a cohesive M-inspired aesthetic. Each component is engineered with attention to fitment accuracy and exterior proportions, creating a factory-inspired upgrade without changing the vehicle’s original structure.
Developed for BMW enthusiasts seeking a modern performance look, this rear bumper delivers a bold transformation while maintaining practical installation compatibility.
Delivery & Packaging
Processing time: 1–3 business days.
Delivery time: 7–10 business days via LTL freight.
Liftgate or internal delivery services are not included(extra charge if needed).
Minor scratches during transport may occur; these can be resolved during the painting process.
Please inspect packages immediately upon arrival to report any damage promptly.
Return & Request
We offer a 30-day return policy for eligible items.
If you wish to request a return or exchange, please contact us and our team will assist you with the process.
Return Conditions:
Item must be unused, unpainted, and in original condition.
Returns are not accepted for painted or modified items.
Original packaging is required for all returns.