aFe BladeRunner OER Series Radiator

2001–2006 BMW 3-Series (E46) / 2001–2008 BMW Z4 (E85/86) 2.5L & 3.0L

Part #: 46-53241

Overview

The aFe BladeRunner OER Series Radiator is a high-quality replacement designed specifically for BMW enthusiasts seeking reliable cooling performance for their E46 3-Series and Z4 models. Over time, factory radiators can become less effective due to corrosion, damage from road debris, or leaks in connectors and joints. This can lead to overheating issues that threaten your engine's health and performance. The BladeRunner OER Radiator offers a durable, all-aluminum construction that restores your cooling system's efficiency and helps prevent costly engine damage.

Whether you're a daily driver, a spirited enthusiast, or involved in track days, maintaining optimal engine temperature is crucial. This radiator is engineered to provide superior heat dissipation, ensuring your vehicle stays cool under demanding conditions. Its robust design and precise fitment make it an ideal upgrade for those looking to enhance reliability and performance without sacrificing OEM quality.

Key Features

The BladeRunner OER Series Radiator incorporates several advanced features to deliver exceptional cooling performance and durability:

• All-aluminum core with molded plastic end tanks for lightweight strength and corrosion resistance.
• Precision-engineered to match OEM specifications for a perfect fit and seamless installation.
• Enhanced heat transfer capabilities due to the high-density aluminum core, promoting efficient cooling of the engine coolant.
• Designed to withstand the rigors of daily driving and spirited use, reducing the risk of leaks and failures over time.
• Corrosion-resistant construction extends the lifespan of your cooling system, even in harsh environments.
• Manufactured with quality craftsmanship, including TIG welding for durability and reliability.
• Compatible with factory mounting points and connections, ensuring straightforward installation.
• Suitable for both stock and modified engines, supporting your vehicle's performance upgrades.
• Meets or exceeds OEM standards for quality and performance, providing peace of mind.

Construction & Design

The aFe BladeRunner OER Radiator features a high-grade aluminum core that offers excellent thermal conductivity, helping to keep engine temperatures in check. The core is designed with a high fin density to maximize surface area for heat dissipation. The molded plastic end tanks are engineered for durability and resistance to cracking or warping, even under thermal stress. TIG welding throughout the assembly ensures a strong, leak-proof construction that maintains integrity over the vehicle's lifespan.

This radiator's design emphasizes lightweight construction without compromising strength, making it an ideal upgrade for performance-oriented drivers. Its precise engineering ensures a perfect fit, reducing installation time and eliminating fitment concerns. The all-aluminum design also facilitates better heat transfer compared to stock units, supporting your engine's cooling needs during aggressive driving or high-temperature conditions.

Performance & Sound

While this radiator is primarily focused on cooling efficiency and durability, its superior heat dissipation capabilities contribute to maintaining optimal engine temperatures, which can improve overall performance and reliability. The all-aluminum construction helps prevent overheating during spirited driving or extended highway use, ensuring your vehicle runs smoothly and efficiently. The design also minimizes noise and vibration, providing a quiet, confident driving experience.

Installation & Fitment

The aFe BladeRunner OER Series Radiator is a direct bolt-on replacement for the OEM radiator in BMW E46 3-Series (2001–2006) and Z4 (2001–2008) models with 2.5L and 3.0L engines. No cutting, drilling, or modifications are required for installation. The radiator mounts to factory points and connects seamlessly with existing hoses and fittings, making the upgrade straightforward for DIY enthusiasts and professional installers alike. Proper installation ensures maximum cooling performance and longevity.

• Easy, bolt-on installation with no modifications needed
• Compatible with OEM mounting hardware and connections
• Designed for use with stock or upgraded cooling system components

What's Included

• All-aluminum radiator core
• Molded plastic end tanks
• Necessary mounting hardware and clamps
• Installation instructions

Ideal For

• BMW E46 3-Series (2001–2006) with 2.5L or 3.0L engines
• BMW Z4 (E85/86) (2001–2008) with 2.5L or 3.0L engines
• Owners seeking a reliable, high-performance radiator upgrade
• Enthusiasts looking to prevent overheating during spirited driving or track use
• Drivers needing a durable replacement for aging or damaged OEM radiators

Emissions Note

This product is designed to meet or exceed OEM standards for quality and performance. Please verify local regulations regarding emissions compliance before installation. This radiator is intended for use in vehicles that are properly registered and maintained according to manufacturer specifications.