Driveshaft Flex Disc (Guibo), Febi-Bilstein - Many BMWs (See List)

Flex Disc, aka the guibo, for many 1984-current BMWs. Because this Guibo fits many models (but not all) we have a very detailed list in the next paragraph, so be sure to find your chassis/model and be sure it is listed for your particular transmission and drivetrain. The flex disc connects the driveshaft to the transmission and provides a buffer to absorb driveline vibrations. The rubber flex disc takes the torque coming out of the transmission and delivers a seamless transition to the driveshaft. But over time the rubber is subjected to constant loading/unloading and it will break down. The rubber is designed to be the weakest link so that the rest of the driveline lasts longer.

Detailed list of BMW fitments for this Guibo / Flex Disc: 

2008-2013 E82 BMW 128i - Either Manual or Automatic Transmission
5/1986-1991 E30 BMW 325e 325es M3 - ** Manual Transmission only
1987-1991 E30 BMW 325ix - Between Transmission & Transfer Case
1996-1998 E36 BMW 328i 328is 328ic - ** Manual Transmission only 
1999-2005 E46 BMW 323i 323ci 325i 325ci - ** Automatic & SMG Transmissions only 
1999-2005 E46 BMW 328i 328ci 330i 330ci - Either Auto, Manual & SMG
2006+ E90 BMW 325i 328i 330i - Either Manual or Automatic Transmission 
2006+ E91 BMW 328i - Either Manual or Automatic Transmission 
2007+ E92 BMW 328i - Either Manual or Automatic Transmission 
2007+ E93 BMW 328 - Either Manual or Automatic Transmission 
2014+ F22 BMW 228i - Either Manual or Automatic Transmission
2012+ F30 BMW 320i 328i 330i - ** Automatic Transmission Only
2016+ F32 BMW 330i 430i - Either Manual or Automatic Transmission
1982-1983 E28 BMW 528e - ** Manual Transmission only
5/1986-1988 E28 BMW 528e - ** Manual Transmission only
1982-1988 E28 BMW 533i 535i 535is M5 - ** Manual Transmission only
1991-1995 E34 BMW 525i - ** Automatic Transmission only
1989-6/1992 E34 BMW 525i - ** Manual Transmission only
1993-1995 E34 BMW 530i - Either Manual or Automatic Transmission
1989-1993 E34 BMW 535i - ** Manual Transmission only
2001-2003 E39 BMW 525i - ** Automatic Transmission only
1997-2003 E39 BMW 528i 530i - Either Manual or Automatic Transmission 
1980-1989 E24 BMW 633csi 635csi M6 - ** Manual Transmission only
2011-2016 F25 BMW X3 sDrive 28i, X3 xDrive 28i, X3 xDrive 35i - All
2000-2006 E53 BMW X5 3.0i - for Rear Driveshaft
2000-2003 E53 BMW X5 4.4i X5 4.6is - for Rear Driveshaft
2007-2013 E70 BMW X5 3.0si X5 4.8i X5 xDrive30i X5 xDrive48i - for Rear Driveshaft 
1997-2002 Z3 BMW Z3 2.3 Z3 2.5i - ** Automatic Transmission only
1997-2002 Z3 BMW Z3 2.8 Z3 3.0i - Either Manual or Automatic Transmission 
2003-2008 Z4 BMW Z4 2.5i - ** Automatic or SMG Transmission only
2003-2008 Z4 BMW Z4 3.0i Z4 3.0si - Either Manual or Automatic Transmission

Symptoms of a failed guibo will be a dull thunk when dipping in/out of the throttle and during shifts. You may also notice cracks in the rubber around the bolt holes. A great time to replace the guibo, and driveshaft center support bearing, is during a clutch overhaul, short shift kit install, or any time the driveshaft is removed from the car.

This guibo is manufactured by Febi-Bilstein, an aftermarket supplier with a two year warranty.

We also recommend replacing the 6 self-locking nuts at the same time.

Install note: the flex disc is directional. During install, look for an arrow on the outer rim. The arrow should point towards the flange and indicates the direction the bolt should go. Installing it backwards will cause premature failure of the flex disc.