Dayco Automatic Belt Tensioner BMW 320Ci 320i 323Ci 323i 325Ci 325i 325Ti 328Ci

Dayco No Slack Automatic Belt Tensioner

Designed to maintain constant tension on serpentine belt drives
Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories.

To maintain the proper tension throughout the drive, an automatic, spring-loaded tensioner is incorporated into the drive system geometry.

Dayco’s Automatic Belt Tensioner features a patented “flat spring” design that’s engineered to provide less operating range variations in tension.

This reduces the risk of premature accessory bearing failure due to high tension when a new belt is installed.

It also lessens the risk of belt squeal and slippage, or poor accessory performance caused by low tension after the belt begins to stretch and wear. A Teflon strip wound within the spring resists abrasion.

The flat spring itself is coated to resist rust.

Other superior design features include a steel locator pin (where the application demands).

A heavy-duty cast aluminium spring case resists cracking and fatigue. The heavy-duty cast aluminium arm offers additional strength and less distortion.

An aluminium retainer ring locks the spring case and arm together, and seals against corrosion.

A steel pivot tube (where the application demands) provides additional strength for critical torque requirements.

A thermoplastic rubber “spring slot plug” keeps out harmful contaminants. The lubricated nylon “pivot tube bushing” and “spring bushing” promote quieter performance.

A rubber “O” ring seals against dust and grime.

The zinc coated mounting bolt resists rust, and is concentric for a more even degree of constant tension.

In order to meet OEM performance standards, Dayco Automatic Tensioners come with either a glass-filled polymer (plastic) or steel pulley, that features a dust cover to protect against contaminants.

Fits the following Make, Model, Series:

BMW > 320Ci > Oct 2000 - Feb 2007, 2.2L, 6 cyl, 24V, DOHC, MPFI, E46, 125kW, EngCode: M54B22

BMW > 320i > Apr 1991 - Dec 1995, 2.0L, 6 cyl, 24V, DOHC, MPFI, E36, 110kW, EngCode: M50

BMW > 320i > Jan 1992 - Jul 1995, 2.0L, 6 cyl, 24V, DOHC, MPFI, E36, 110kW, EngCode: M50

BMW > 320i > 1995 - 1998, 2.0L, 6 cyl, 24V, DOHC, MPFI, E36, 110kW, EngCode: M52B20

BMW > 320i > 1998 - 2000, 2.0L, 6 cyl, 24V, DOHC, MPFI, E46, 110kW, EngCode: M52B20

BMW > 320i > Oct 2000 - Aug 2002, 2.2L, 6 cyl, 24V, DOHC, MPFI, E46, EngCode: M54B22

BMW > 320i > Sep 2002 - May 2007, 2.2L, 6 cyl, 24V, DOHC, MPFI, E46, EngCode: M54B22

BMW > 323Ci > Jun 1999 - Oct 2000, 2.5L, 6 cyl, 24V, DOHC, MPFI, E46, EngCode: M52B25

BMW > 323i > Jan 1995 - Aug 1999, 2.5L, 6 cyl, 24V, DOHC, MPFI, E36, 125kW, EngCode: M52B25

BMW > 323i > Sep 1998 - Oct 2000, 2.5L, 6 cyl, 24V, DOHC, MPFI, E46, 125kW, EngCode: M52B25

BMW > 325Ci > Sep 2002 - Feb 2007, 2.5L, 6 cyl, 24V, DOHC, MPFI, E46, 141kW, EngCode: M54B25

BMW > 325i > Apr 1991 - Sep 1991, 2.5L, 6 cyl, 24V, DOHC, EFI, E36, 141kW, EngCode: M50B25

BMW > 325i > Oct 1991 - Mar 1995, 2.5L, 6 cyl, 24V, DOHC, EFI, E36, 141kW, EngCode: M50B25

BMW > 325i > Oct 2000 - Aug 2002, 2.5L, 6 cyl, 24V, DOHC, MPFI, E46, EngCode: M52B25

BMW > 325i > Oct 2000 - Jan 2004, 2.5L, 6 cyl, 24V, DOHC VVT, MPFI, E46, 141kW, EngCode: M54B25

BMW > 325i > Sep 2002 - Apr 2005, 2.5L, 6 cyl, 24V, DOHC, MPFI, E46, EngCode: M52B25

BMW > 325Ti > 2001 - Jul 2005, 2.5L, 6 cyl, 24V, DOHC, MPFI, E46, 141kW, EngCode: M54B25

BMW > 328Ci > Jun 1999 - Sep 2000, 2.8L, 6 cyl, 24V, DOHC, MPFI, E46, EngCode: M52TUB28

BMW > 328i > Jun 1995 - Sep 2000, 2.8L, 6 cyl, 24V, DOHC, MPFI, E36, 142kW, EngCode: M52B28

BMW > 328i > Sep 1999 - Oct 2000, 2.8L, 6 cyl, 24V, DOHC, MPFI, E46, 142kW, EngCode: M52TUB28

BMW > 330Ci > Sep 2000 - Aug 2002, 3.0L, 6 cyl, 24V, DOHC, MPFI, E46, EngCode: M54B30

BMW > 330Ci > Sep 2002 - Feb 2007, 3.0L, 6 cyl, 24V, DOHC, MPFI, E46, EngCode: M54B30

BMW > 330i > Sep 2000 - Apr 2005, 3.0L, 6 cyl, 24V, DOHC, MPFI, E46, 170kW, EngCode: M54B30

BMW > 523i > Apr 1996 - Mar 1998, 2.5L, 6 cyl, 24V, DOHC, MPFI, E39, 125kW, EngCode: M52TUB25

BMW > 523i > Apr 1998 - Sep 1998, 2.5L, 6 cyl, 24V, DOHC, MPFI, E39, 125kW, EngCode: M52TUB25

BMW > 523i > Oct 1998 - Nov 2003, 2.5L, 6 cyl, 24V, DOHC, MPFI, E39, 125kW, EngCode: M52TUB25

BMW > 525i > Nov 1990 - Sep 1991, 2.5L, 6 cyl, 24V, DOHC, MPFI, E34, EngCode: M50B25

BMW > 525i > Oct 1991 - Jan 1992, 2.5L, 6 cyl, 24V, DOHC, MPFI, E34, EngCode: M50B25

BMW > 525i > Feb 1992 - Mar 1996, 2.5L, 6 cyl, 24V, DOHC, MPFI, E34, EngCode: M50B25

BMW > 525i > 2000 - 2003, 2.5L, 6 cyl, 24V, DOHC, EFI, E39, 135kW, EngCode: M54B25

BMW > 525i > Dec 2000 - Aug 2002, 2.5L, 6 cyl, 24V, DOHC, MPFI, E39, EngCode: M52B25

BMW > 525i > Sep 2002 - Oct 2003, 2.5L, 6 cyl, 24V, DOHC, MPFI, E39, EngCode: M52B25

BMW > 525i > 2003 - 2005, 2.5L, 6 cyl, 24V, DOHC, EFI, E60, 135kW, EngCode: M54B25

BMW > 528i > Apr 1996 - Feb 1998, 2.8L, 6 cyl, 24V, DOHC, MPFI, E39, 142kW, EngCode: M52B28

BMW > 528i > Mar 1998 - Sep 1998, 2.8L, 6 cyl, 24V, DOHC, MPFI, E39, 142kW, EngCode: M52B28

BMW > 528i > Oct 1998 - Nov 2000, 2.8L, 6 cyl, 24V, DOHC, MPFI, E39, 142kW, EngCode: M52TUB28

BMW > 528i > Oct 1998 - Nov 2000, 2.5L, 6 cyl, 24V, DOHC, MPFI, E39, 125kW, EngCode: M52B25

BMW > 530i > Dec 2000 - Aug 2002, 3.0L, 6 cyl, 24V, DOHC, MPFI, E39, 170kW, EngCode: M54B30

BMW > 530i > Sep 2002 - Sep 2003, 3.0L, 6 cyl, 24V, DOHC, MPFI, E39, 170kW, EngCode: M54B30

BMW > 530i > Oct 2003 - Apr 2005, 3.0L, 6 cyl, 24V, DOHC, MPFI, E60, 170kW, EngCode: M54B30

BMW > M > Oct 1998 - Dec 2001, 3.2L, 6 cyl, 24V, DOHC, MPFI, Z3M, EngCode: S50B32

BMW > M3 > Jun 1994 - Dec 1995, 3.0L, 6 cyl, 24V, DOHC, MPFI, E36, EngCode: S50B30

BMW > M3 > Feb 1996 - Jun 2000, 3.2L, 6 cyl, 24V, DOHC, MPFI, E36, 236kW, EngCode: S50B32

BMW > M3 > Mar 2001 - Sep 2007, 3.2L, 6 cyl, 24V, DOHC, MPFI, E46, EngCode: S54B32

BMW > X3 > Jun 2004 - Nov 2006, 2.5L, 6 cyl, 24V, DOHC, MPFI, E83 25i, 141kW, EngCode: M54B25

BMW > X3 > Jun 2004 - Nov 2006, 3.0L, 6 cyl, 24V, DOHC, MPFI, E83, 170kW, EngCode: M54B30

BMW > X5 > Mar 2001 - Dec 2003, 3.0L, 6 cyl, 24V, DOHC, MPFI, E53, 170kW, EngCode: M54B30

BMW > Z3 > Apr 1997 - Sep 1998, 2.8L, 6 cyl, 24V, DOHC, MPFI, E36, EngCode: M52TUB28

BMW > Z3 > May 1997 - Jul 2000, 3.2L, 6 cyl, 24V, DOHC, MPFI, E36, 236kW, EngCode: S50B32

BMW > Z3 > Oct 1998 - Sep 2000, 2.8L, 6 cyl, 24V, DOHC, MPFI, E36, EngCode: M52B28