Description
The Mishimoto Performance Fan Shroud Kit (MMFS-E46-99K) replaces the failure-prone factory mechanical fan on the BMW E46 with a dedicated 16-inch electric fan and shroud assembly rated at over 1850 CFM of airflow. Finished in a Stealth Black powder-coat and built with a slim 3-inch maximum depth, this shroud bolts directly to a stock or Mishimoto E46 Performance Aluminum Radiator on both manual and automatic transmission cars. Mishimoto also offers this kit with its optional Adjustable Fan Controller Kit for drivers who want direct command over coolant temperature.
Whether you’re chasing track-day reliability or simply want to retire an aging factory fan setup, this Mishimoto cooling upgrade pairs a high-flow electric fan with a purpose-built steel shroud instead of relying on a mechanical clutch fan. Mishimoto designed this kit to outperform the stock electric fan found on manual-transmission E46 cars and to eliminate the mechanical fan on automatics altogether, while remaining compatible with the stock coolant expansion tank or a Mishimoto aluminum expansion tank. The kit ships with all mounting hardware needed for installation and is backed by the Mishimoto Lifetime Warranty, making it a straightforward cooling upgrade for E46 and Z4 owners who want a slimmer, higher-flow fan shroud in the engine bay.
Vehicle Applications
This fan shroud kit is built for the BMW E46 and Z4 chassis. It fits the 1999 BMW 323is and 328is, the 1999-2000 328i, and the 1999-2001 323i. It also covers the 2000 323Ci and 328Ci, the 2001-2005 320i, 325i, 325xi, 330i, and 330xi, and the 2001-2006 325Ci and 330Ci, along with the 2005 330Ci M and 330i M. On the Z4 side, coverage includes the 2003-2006 Z4 2.5i and 3.0i, the 2006-2008 Z4 Coupe 3.0si, Z4 Roadster 3.0i, and Z4 Roadster 3.0si, the 2006-2009 Z4 M Coupe and Z4 M Roadster, the 2007-2009 Z4 2.5si and 3.0si, and the 2009 Z4 sDrive30i and sDrive35i. This shroud is designed around the M52, M54, and M56 engine codes and will not fit E46 models equipped with a 4-cylinder engine.
Features
- Bolts directly to a stock or Mishimoto E46 Performance Aluminum Radiator on manual or automatic transmission cars
- Up to 22°F (12.2°C) reduction in outlet temperatures at idle compared to the stock electric fan, when tested on an E46 manual transmission vehicle
- Includes a 16-inch electric fan producing over 1850 CFM of airflow
- Optional Mishimoto Adjustable Fan Controller Kit (MMFAN-CNTL-U) provides complete control of coolant temperatures at idle, using both NPT and probe-type sensors
- Compatible with stock or Mishimoto aluminum coolant expansion tank
- Replaces the failure-prone stock mechanical fan on automatic-transmission models
- Stealth Black powder-coat finish
- Slim maximum depth of 3 inches to save engine bay space
- Includes all mounting hardware for installation
- Backed by the Mishimoto Lifetime Warranty
Specifications
- Brand: Mishimoto
- Part Number: MMFS-E46-99K
- Fan Diameter: 16 in
- Blade Quantity: 10
- Blade Material: Plastic
- Blade Type: Straight
- Blade Color: Black
- Maximum Airflow: 1850 CFM
- Shroud Material: Steel
- Shroud Finish: Black Powder-Coat
- Shroud Height: 14.2 in
- Shroud Length: 29.7 in
- Maximum Depth: 3 in
- Electrical Connection: Plug-In
- Chassis Code: E46
- Engine Codes: M52, M54, M56
- Grade Type: Performance
Frequently Asked Questions
What vehicles does this fan shroud fit?
It fits the 1999 BMW 323is/328is, 1999-2000 328i, 1999-2001 323i, 2000 323Ci/328Ci, 2001-2005 320i/325i/325xi/330i/330xi, 2001-2006 325Ci/330Ci, 2005 330Ci M/330i M, and various BMW Z4 models from 2003-2009 including the 2.5i, 3.0i, 2.5si, 3.0si, Coupe 3.0si, M Coupe, M Roadster, sDrive30i, and sDrive35i.
Will it work with my stock radiator?
Yes, this shroud is compatible with the stock radiator or a Mishimoto E46 Performance Aluminum Radiator, on both manual and automatic transmission cars.
How much airflow does the included fan produce?
The 16-inch electric fan included in this kit produces over 1850 CFM of airflow.
Can I add temperature control to this kit?
Yes, an optional Mishimoto Adjustable Fan Controller Kit (MMFAN-CNTL-U) is available, which includes both NPT and probe-type temperature sensors for complete control of coolant temperature at idle.
Does this fit 4-cylinder E46 models?
No, this fan shroud will not fit E46 models with a 4-cylinder engine.
What is included and is it warrantied?
The kit includes the steel shroud with black powder-coat finish, the 16-inch electric fan, an adjustable relay, temperature probe and sensor, wiring harness and connectors, all mounting hardware, and is covered by the Mishimoto Lifetime Warranty.
âš WARNING (California Proposition 65): This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
