The Mishimoto racing thermostat for the Audi S4 2000?2006 will promote greater cooling efficiency throughout your engine.

The Mishimoto racing thermostat will significantly lower high engine temperature produced by modified and upgraded turbo applications. Once the engine is fully warmed up the Mishimoto racing thermostat will open up at a lower temperature than standard thermostats, also allowing the coolant to flow through the engine sooner thus reducing and maintaining cooler engine temperatures.

Features:

Fits the BMW E39 E46 E60 M52 M54 M56 99-06

Activates at lower temperature so coolant flows through system earlier

Allows for cooler engine temperatures

OEM Activation temperature: 97°C

MISHIMOTO Activation temperature: 70°C

Fits:

1999?2000 BMW 323i (all body types)

2000 BMW 323Ci (all body types)

2001?2006 BMW 325Ci (all body types)

2001?2005 BMW 325i (all body types)

2001?2005 BMW 325xi (all body types)

1999?2000 BMW 328i (all body types)

2000 BMW 328Ci (all body types)

2001?2005 BMW 330i (all body types)

2001?2005 BMW 330xi (all body types)

2001-2005 BMW 525i (all body types)

1999?2000 BMW 528i (all body types)

2001?2005 BMW 530i (all body / chassis types)

2001?2006 BMW X5 (6cyl engine only)

2004?2006 BMW X3

1998?2002 BMW Z3 (from 9/1998)

2003?2005 BMW Z4

Engine codes: 

M52

M52TUB25

M52TUB28

M54

M54B25

M54B30

M56