Mishimoto Performance Aluminium Radiator for BMW E46 M3 (S54, 2001-2006) - Dual Row Direct Fit - MMRAD-E46-01

BMW E46 M3 S54 Alloy Cooling Upgrade - Two Row Direct Replacement - MMRAD-E46-01

Give your S54B32 the cooling headroom it deserves. This uprated alloy heat exchanger is a true plug and play replacement for the factory plastic-tank unit, delivering stronger construction, greater capacity and noticeably steadier temperatures on spirited road use and track days. If you are tackling heat soak, chasing reliability or building a fast-road or circuit-focused E46 M3, this is the cooling solution that works.

Part Number: MMRAD-E46-01

Why this upgraded cooler stands out

• Direct replacement for 2001 to 2006 E46 M3 with the S54B32 engine
• High efficiency two row core for excellent heat rejection under sustained load
• TIG welded aluminium tanks for durability compared with ageing plastic OE units
• CNC quick release fittings to connect with factory hoses and hardware
• Works with the stock fan clutch or the Mishimoto electric fan shroud
• Compatible with most aftermarket supercharger packages
• Integrated 1/8 inch NPT port for an auxiliary temperature or pressure sensor
• Includes clutch fan removal tool for easier installation
• Backed by a lifetime warranty from Mishimoto

Measured gains that matter

• 32 percent increase in coolant surface area
• 15 percent increase in air side surface area
• 25 percent increase in overall coolant capacity

More area and volume equals more control. Expect quicker recovery between sessions, confidence on hot days and reduced risk of overheating on long climbs, track work and Nurburgring trips.

Proven on our builds

We have installed and run this unit on customer cars and our own E46 projects at MJ Modifications. Feedback has been consistently positive, with stable coolant temps, predictable warm-up and a noticeable improvement in consistency during back-to-back laps.

Tech highlights

• Overall size: 27.4" x 17.0" x 4.4"
• Core size: 22.83" x 16.14"
• Core thickness: 1.90"
• Rows: 2
• Inlet and outlet: OEM-style quick disconnect
• Tank wall thickness: 0.08"

What you receive

• Alloy radiator assembly
• Fan tool
• Black 1/8" NPT plug
• (5) M6 x 1.0 x 16 mm flange hex bolts
• Mishimoto lifetime warranty documentation

Fitment

• Chassis: E46
• Model: M3 coupe and convertible, including CSL
• Years: 2001, 2002, 2003, 2004, 2005, 2006
• Engine: S54 / S54B32

Installation

Bolt-in swap that reuses factory shrouds and mounting points. No trimming required. Compatible with the OEM clutch fan or Mishimoto electric fan shroud. The built-in 1/8 inch NPT port makes adding a gauge or sensor straightforward.

Want professional fitting. MJ Modifications in Warwickshire can install and bleed your cooling system and provide fluid recommendations. Request a quote at info@mjmodifications.co.uk.

Pre-dispatch compatibility check

For peace of mind, provide your UK registration or last 7 of your VIN at checkout and we will confirm suitability for your exact E46 M3 specification before shipping.

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Part Number: MMRAD-E46-01