European Wholesale Parts

2001-2006 BMW M3 cooling upgrades

33 cooling upgrades for the E46 2001-2006 BMW M3 (S54 3.2L inline-six) from 8 brands. Radiators, oil coolers, expansion tanks and hoses sold as upgrades.

Before you order

Confirm the engine and model-year range on the retailer page.
Listings are read from the retailer's E46 M3 category. Coupe and convertible, manual and SMG cars can use different parts. Confirm body style and gearbox on the retailer page before ordering.

Brands on this page: Spal (12), Mishimoto (8), DO88 (5), ECS (3), Turner Motorsport (2), CSF (1), Genuine BMW (1), Powerflex (1).

CSF · Part no. 7058
E46 M3 High Performance Aluminum Radiator
Ultra-efficient dual-core, triple-pass radiator from the leader in E46 M3 cooling. Cooler engine temps mean more power and longer life of engine components.
Check price at ECS Tuning for CSF E46 M3 High Performance Aluminum Radiator (opens the retailer site)
DO88 · Part no. WC310S
Aluminum Radiator - Black - E46 M3
Let your engine breathe better with this DO88 Radiator!
Check price at ECS Tuning for DO88 Aluminum Radiator - Black - E46 M3 (opens the retailer site)
DO88 · Part no. WC310B
Aluminum Radiator - Blue Hose - E46 M3
Let your engine breathe better with this DO88 Radiator!
Check price at ECS Tuning for DO88 Aluminum Radiator - Blue Hose - E46 M3 (opens the retailer site)
DO88 · Part no. WC310R
Aluminum Radiator - Red Hose - E46 M3
Let your engine breathe better with this DO88 Radiator!
Check price at ECS Tuning for DO88 Aluminum Radiator - Red Hose - E46 M3 (opens the retailer site)
DO88 · Part no. OC120E46
DO88 Racing Auxiliary Oil Cooler - E46 M3
Oil cooler for power steering or gearbox oil cooling.
Check price at ECS Tuning for DO88 DO88 Racing Auxiliary Oil Cooler - E46 M3 (opens the retailer site)
DO88 · Part no. OC150
DO88 Racing Oil Cooler - E46 M3
The perfect oil cooler for the track and on the street!
Check price at ECS Tuning for DO88 DO88 Racing Oil Cooler - E46 M3 (opens the retailer site)
ECS · Part no. 003631ECS01KT
ECS Silicone Hose Kit
Includes upper and lower radiator hoses, Water Pipe Connecting Line and Aluminum Coolant Bleeder Screw
Check price at ECS Tuning for ECS ECS Silicone Hose Kit (opens the retailer site)
ECS · Part no. 003530ECS01A
Heavy Duty Aluminum Coolant Bleeder Screw
Offering superior fatigue resistance over conventional plastic screws. Say goodbye to snapped and mangled bleeder screw heads!
Check price at ECS Tuning for ECS Heavy Duty Aluminum Coolant Bleeder Screw (opens the retailer site)
ECS · Part no. 003631ECS01
Silicone Radiator Hose Kit
Retains OEM fitment with superior looks and durability!
Retailer fitment note: Includes new connectors - don't reuse brittle, high mileage plastic connectors!
Check price at ECS Tuning for ECS Silicone Radiator Hose Kit (opens the retailer site)
Genuine BMW · Part no. 32412282353
Power Steering Cooler Return Line
Runs from the cooler to the reservoir
Check price at ECS Tuning for Genuine BMW Power Steering Cooler Return Line (opens the retailer site)
Mishimoto · Part no. MMRALC
Mishimoto Liquid Chill Radiator Coolant Additive - 4oz
Pairs with all types of coolant to increase heat transfer and decrease engine temps.
Check price at ECS Tuning for Mishimoto Mishimoto Liquid Chill Radiator Coolant Additive - 4oz (opens the retailer site)
Mishimoto · Part no. MMFAN10
Universal 10" Electric Fan - Black
850 CFM - 5.1 amps at 12.3 volts
Check price at ECS Tuning for Mishimoto Universal 10" Electric Fan - Black (opens the retailer site)
Mishimoto · Part no. MMFAN12
Universal 12" Electric Fan - Black
934 CFM - 5.7 amps at 12.3 volts
Check price at ECS Tuning for Mishimoto Universal 12" Electric Fan - Black (opens the retailer site)
Mishimoto · Part no. MMFAN12BL
Universal 12" Electric Fan - Blue
934 CFM - 5.7 amps at 12.3 volts
Check price at ECS Tuning for Mishimoto Universal 12" Electric Fan - Blue (opens the retailer site)
Mishimoto · Part no. MMFAN12RD
Universal 12" Electric Fan - Red
934 CFM - 5.7 amps at 12.3 volts
Check price at ECS Tuning for Mishimoto Universal 12" Electric Fan - Red (opens the retailer site)
Mishimoto · Part no. MMFAN14
Universal 14" Electric Fan - Black
954 CFM - 5.6 amps at 12.3 volts
Check price at ECS Tuning for Mishimoto Universal 14" Electric Fan - Black (opens the retailer site)
Mishimoto · Part no. MMFAN16
Universal 16" Electric Fan - Black
1934 CFM - 10.8 amps at 12.14 volts
Check price at ECS Tuning for Mishimoto Universal 16" Electric Fan - Black (opens the retailer site)
Mishimoto · Part no. MMFANMOUNT
Universal Fan Mount Kit
Through radiator mounts for custom applications
Check price at ECS Tuning for Mishimoto Universal Fan Mount Kit (opens the retailer site)
Powerflex · Part no. PFF5-4652
Powerflex - Offset Lower Radiator Mounts - Street
Enhance cooling efficiency, precise radiator alignment, improved durability, & reduced vibrations
Check price at ECS Tuning for Powerflex Powerflex - Offset Lower Radiator Mounts - Street (opens the retailer site)
Spal · Part no. 30130074
16" Fan shroud gasket
Provides .25" stand off from radiator
Check price at ECS Tuning for Spal 16" Fan shroud gasket (opens the retailer site)
Spal · Part no. SPL185TS
Spal 185 Degree Thermo-Switch
Replacement thermo-switch for Spal electric fan conversion kits.
Check price at ECS Tuning for Spal Spal 185 Degree Thermo-Switch (opens the retailer site)
Spal · Part no. FRH
Spal Electric Fan Harness with Relay
Electric Fan Relay - 40 amp, 12V, single pole wiring harness kit
Check price at ECS Tuning for Spal Spal Electric Fan Harness with Relay (opens the retailer site)
Spal · Part no. 185FH
Spal Electric Fan Harness with Relay - 185 Degree
Single Fan 40amp relay wiring harness kit - 185 degree on/165 degree off with Sending unit
Check price at ECS Tuning for Spal Spal Electric Fan Harness with Relay - 185 Degree (opens the retailer site)
Spal · Part no. 30100375
Universal 12" Electric Fan - Black
861 CFM. High performance puller fan with straight blades.
Check price at ECS Tuning for Spal Universal 12" Electric Fan - Black (opens the retailer site)
Spal · Part no. 30102029
Universal 12" Electric Fan - Black
1328 CFM. High performance puller fan with curved blades.
Check price at ECS Tuning for Spal Universal 12" Electric Fan - Black (opens the retailer site)
Spal · Part no. 30100385
Universal 14" Electric Fan - Black
1038 CFM. High performance puller fan with curved blades.
Check price at ECS Tuning for Spal Universal 14" Electric Fan - Black (opens the retailer site)
Spal · Part no. 30101516
Universal 16" Electric Fan - Black
1469 CFM. High performance puller fan with straight blades.
Check price at ECS Tuning for Spal Universal 16" Electric Fan - Black (opens the retailer site)
Spal · Part no. 30102049
Universal 16" Electric Fan - Black
2024 CFM. High performance puller fan with curved blades.
Check price at ECS Tuning for Spal Universal 16" Electric Fan - Black (opens the retailer site)
Spal · Part no. 30102048
Universal 16" Electric Fan - Black
1959 cfm. High performance pusher fan with curved blades.
Check price at ECS Tuning for Spal Universal 16" Electric Fan - Black (opens the retailer site)
Spal · Part no. 30102113
Universal 16" High performance Electric Fan - Black
2467 CFM. High performance puller fan with curved blades.
Check price at ECS Tuning for Spal Universal 16" High performance Electric Fan - Black (opens the retailer site)
Spal · Part no. 30100400
Universal 16" Low Profile Electric Fan
1300 CFM. High performance pull fan with straight blades
Check price at ECS Tuning for Spal Universal 16" Low Profile Electric Fan (opens the retailer site)
Turner Motorsport · Part no. 008682LA02
E46 M3 Heavy Duty Aluminum Expansion Tank Kit
The last expansion tank you'll ever need! Upgrade to durable aluminum construction and leave failure-prone plastic behind.
Check price at ECS Tuning for Turner Motorsport E46 M3 Heavy Duty Aluminum Expansion Tank Kit (opens the retailer site)
Turner Motorsport · Part no. 004268LA01
E46 M3 Triple-Pass Aluminum Radiator
Track-tested and street-ready—the ULTIMATE cooling system upgrade for your E46 M3!
Check price at ECS Tuning for Turner Motorsport E46 M3 Triple-Pass Aluminum Radiator (opens the retailer site)