Koyo Radiator for 2001–2006 BMW E46 M3 3.2L I6, Part Number koyHH422675

All Transmissions; S54 Engine

The Koyo radiator is designed for 2001–2006 BMW E46 M3 models equipped with the 3.2L inline-six S54 engine. Built for automotive cooling applications, this replacement radiator supports dependable engine temperature control across all transmissions. It is engineered as a direct-fit cooling solution for the E46 M3 platform, helping maintain consistent coolant flow and heat dissipation during daily driving, spirited use, and demanding operating conditions.

Koyo is recognized for producing application-specific cooling components designed to meet the service needs of modern vehicles. This radiator, part number koyHH422675, is manufactured for compatibility with the BMW M3 cooling system and is intended to replace a worn, damaged, or aging original radiator. Its vehicle-specific design helps simplify installation while preserving proper fitment within the factory engine compartment.

Key product specifications and technical data:

• Brand: Koyo
• Part Number: koyHH422675
• Product Type: Automotive radiator
• Vehicle Application: BMW E46 M3
• Engine Compatibility: 3.2L S54 inline-six
• Transmission Compatibility: All transmissions
• Model Years: 2001–2006
• Replacement Function: Engine cooling system radiator

What's included: One Koyo radiator for the specified BMW E46 M3 application. Installation hardware, hoses, coolant, and additional cooling-system components are not included unless specifically noted by the manufacturer.

Fitment: Fits 2001, 2002, 2003, 2004, 2005, and 2006 BMW M3 models with the 3.2L S54 engine. Confirm the vehicle year, engine, and transmission configuration before ordering to ensure application compatibility.

Features:

• Application-specific replacement radiator for BMW E46 M3 models
• Designed for the 3.2L S54 inline-six engine
• Compatible with all listed transmission configurations
• Supports consistent engine cooling and dependable heat dissipation

Fitments:
2001 BMW M3 Base
2002 BMW M3 Base
2003 BMW M3 Base
2004 BMW M3 Base
2005 BMW M3 Base
2006 BMW M3 Base

Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: N
Part Type: automotive
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: t
Units Per Sku: 1