Wilwood AERO4 Rear Kit

Fits 2007–2011 BMW E90 Series

Part #: 140-13583-D

Overview

The Wilwood AERO4 Rear Kit is a high-performance brake upgrade designed specifically for late model BMW E90 series vehicles. This kit replaces the factory rear disc brakes with a robust, high-capacity setup that enhances stopping power and durability. Engineered for enthusiasts seeking improved braking response and a high-tech aesthetic, the AERO4 kit complements front big brake upgrades and supports aggressive driving styles. It’s ideal for drivers who demand reliable, consistent braking performance during spirited driving or track days, while maintaining compatibility with OE systems such as ABS and vehicle-specific brake bias. This rear brake kit features large, drilled rotors and high-capacity calipers that help dissipate heat effectively, reducing brake fade during demanding driving conditions. The inclusion of BP-10 compound pads ensures excellent friction characteristics, providing confident stopping power and modulation. Designed to integrate seamlessly with your vehicle’s existing master cylinder and ABS system, this kit offers a straightforward upgrade path for those looking to elevate their BMW’s braking performance without extensive modifications.

Key Features

This Wilwood AERO4 Rear Kit combines advanced materials and thoughtful design to deliver superior braking performance. Key features include:

• Oversized 14.00" drilled rotors for enhanced heat dissipation and fade resistance
• High-capacity W4AR calipers engineered for strength and durability
• OE parking brake assembly retained for convenience and compatibility
• BP-10 compound pads for consistent friction and low dust
• Designed to match OE master cylinder output and ABS function
• High-tech styling that complements modern wheel and suspension upgrades
• Constructed with corrosion-resistant materials for long-lasting performance

Construction & Design

The AERO4 rear brake kit features precision-machined, drilled rotors crafted from high-quality cast iron, ensuring optimal heat management and longevity. The calipers are designed with a robust, lightweight aluminum construction, providing strength without adding unnecessary weight. The drilled rotor pattern not only improves cooling but also adds a distinctive, performance-oriented aesthetic that enhances the vehicle’s appearance.

Driving Feel & Feedback

This brake upgrade offers a noticeable improvement in braking response and pedal feel, giving you greater confidence during aggressive driving. The combination of large rotors and high-capacity calipers ensures consistent, fade-free performance, even under demanding conditions. The pads provide excellent bite and modulation, allowing for precise control and confident stops.

Installation & Fitment

Designed as a direct bolt-on upgrade, this kit is intended to fit the specified BMW E90 models without requiring extensive modifications. Proper installation ensures optimal performance and longevity, and professional installation is recommended to guarantee correct fitment and function.

What’s Included

The package includes all necessary components for rear brake upgrade, including drilled rotors, calipers, pads, and mounting hardware, providing a complete solution for your vehicle’s braking system.

Ideal For

Enthusiasts seeking to improve their BMW’s braking performance for spirited driving, track use, or high-performance street applications will benefit from this upgrade. It’s perfect for those looking to combine style, durability, and reliable stopping power in a comprehensive rear brake solution.