Race-Proven Cooling, Built Without Compromise

The do88 Performance Radiator for the BMW M3 E46 is engineered to keep coolant temperatures under control during the most demanding conditions. With a larger core, triple-pass design, and all-aluminium construction, it’s the ultimate upgrade for drivers who need uncompromising reliability and efficiency on road, track, or endurance events.

Why Upgrade to a do88 Radiator?

Increased Core Volume & Efficiency

• 17% larger core volume – 11,736 cm³ vs. 10,068 cm³ OEM

• Triple-pass design – coolant is directed across the core three times for maximum heat transfer

• Significantly reduces coolant temperatures compared to the stock plastic/aluminium hybrid unit

Built for Motorsport Conditions

• Fully aluminium construction with uninterrupted TIG welds for strength and reliability

• Eliminates fragile OEM plastic end tanks, preventing leaks and failures common in track use

• Drop-in fitment with no cutting or modifications required

Enhanced Features for Serious Drivers

• Includes new silicone hoses for a complete installation

• Supplied with Bosch temperature sensor for factory integration

• Built-in port for additional temp sensor (M12x1.5) – ideal for monitoring or aftermarket fan control

• Pre-fabricated front brackets to mount a do88 auxiliary oil cooler

Key Features at a Glance

• 17% increase in core volume vs OEM

• Triple-pass water flow design for superior cooling

• All-aluminium construction, no plastic quick-connects

• Bosch sensor + extra sensor take-off included

• CNC-machined fittings and brackets

• Supplied with new hoses

• Prepared for additional do88 oil cooler fitment

• Direct drop-in installation

Applications

• BMW M3 E46 (2000–2006, S54 engine)

Why Choose do88?

do88 are Swedish cooling specialists trusted by enthusiasts and racers worldwide. Every product is developed with rigorous in-house testing, CFD design, and track validation to guarantee performance with no compromises. Whether you’re chasing lap times or simply looking for long-term reliability, do88 parts deliver.