Dayco Automatic Belt Tensioner BMW 118D 218D 318D 320D 330D 335D 420D 520D 530D

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 > 118D > Oct 2011 - May 2015, 2.0L, 4 cyl, 16V, DOHC, CRD, I/C Turbo, Diesel, F20, 105kW, EngCode: N47D20C

BMW > 218D > Nov 2014 - , 2.0L, 4 cyl, 16V, DOHC, DTi, Turbo, Diesel, F45, 110kW, EngCode: N47D20O

BMW > 318D > Apr 2012 - Apr 2014, 2.0L, 4 cyl, 16V, DOHC, CRD, I/C Turbo, Diesel, F30, 105kW, EngCode: N47D20C

BMW > 320D > May 2010 - Jan 2014, 2.0L, 4 cyl, 16V, DOHC, CRD, Turbo, Diesel, E92, 135kW, EngCode: N47D20C

BMW > 320D > May 2010 - Jan 2014, 2.0L, 4 cyl, 16V, DOHC, CRD, Turbo, Diesel, E93, 135kW, EngCode: N47D20C

BMW > 320D > Feb 2012 - Sep 2015, 2.0L, 4 cyl, 16V, DOHC, CRD, Turbo, Diesel, F30, 135kW, EngCode: N47D20C

BMW > 320D > May 2013 - Jan 2017, 2.0L, 4 cyl, 16V, DOHC, CRD, Turbo, Diesel, F34, 135kW, EngCode: N47D20C

BMW > 320D > Oct 2015 - , 2.0L, 4 cyl, 16V, DOHC, CRD, Turbo, Diesel, F30 / F31, 140kW, EngCode: N47D20C

BMW > 330D > 2013 - , 3.0L, 6 cyl, 24V, DOHC, CRD, Turbo, Diesel, F30, 190kW, EngCode: N57D30

BMW > 330D > 2013 - , 3.0L, 6 cyl, 24V, DOHC, CRD, Turbo, Diesel, F31, 190kW, EngCode: N57D30

BMW > 335D > May 2005 - Jan 2010, 3.0L, 6 cyl, 24V, DOHC, CRD, Turbo, Diesel, E90, 210kW, EngCode: N57D30

BMW > 335D > 2015 - , 3.0L, 6 cyl, 24V, DOHC, CRD, Turbo, Diesel, F31, 230kW, EngCode: N57D30T

BMW > 420D > Oct 2013 - , 2.0L, 4 cyl, 16V, DOHC, CRD, I/C Turbo, Diesel, F32, 135kW, EngCode: N47D20C

BMW > 420D > Jan 2014 - , 2.0L, 4 cyl, 16V, DOHC, CRD, I/C Turbo, Diesel, F33, 135kW, EngCode: N47D20C

BMW > 420D > May 2014 - , 2.0L, 4 cyl, 16V, DOHC, CRD, I/C Turbo, Diesel, F36, 135kW, EngCode: N47D20C

BMW > 520D > Jun 2010 - , 2.0L, 4 cyl, 16V, DOHC, DTFI, Turbo, Diesel, F10, 135kW, EngCode: N47TU2D20

BMW > 520D > Sep 2010 - , 2.0L, 4 cyl, 16V, DOHC, DTFI, Turbo, Diesel, F11, 135kW, EngCode: N47TU2D20

BMW > 520D > Aug 2012 - Mar 2017, 2.0L, 4 cyl, 16V, DOHC, CRD, Turbo, Diesel, F07, 135kW, EngCode: N47D20C

BMW > 530D > May 2012 - , 3.0L, 6 cyl, 24V, DOHC, CRD, Turbo, Diesel, F11, 180kW, EngCode: N57D30

BMW > X1 > Sep 2012 - Sep 2015, 2.0L, 4 cyl, 16V, DOHC, CRD, Turbo, Diesel, E84 18d, 105kW, EngCode: N47D20C

BMW > X1 > Sep 2012 - Sep 2015, 2.0L, 4 cyl, 16V, DOHC, CRD, Turbo, Diesel, E84 20d, 135kW, EngCode: N47D20C

BMW > X3 > Mar 2011 - Apr 2014, 2.0L, 4 cyl, 16V, DOHC, CRD, Turbo, Diesel, F25 20d, 135kW, EngCode: N47D20C

BMW > X3 > May 2011 - , 3.0L, 6 cyl, 16V, DOHC, DTFI, Twin Turbo, Diesel, F25 30d, 190kW, EngCode: N57D30

BMW > X4 > Jun 2014 - Apr 2018, 3.0L, 6 cyl, 24V, DOHC, CRD, I/C Turbo, Diesel, F26, 230kW, EngCode: N57D30B

BMW > X4 > Jun 2014 - , 3.0L, 6 cyl, 24V, DOHC, CRD, Turbo, Diesel, F26 30d, 190kW, EngCode: N57D30A

BMW > X5 > Oct 2013 - Nov 2018, 3.0L, 6 cyl, 24V, DOHC, CRD, Turbo, Diesel, F15 xDrive 30d, 190kW, EngCode: N57D30A

BMW > X5 > Oct 2013 - Nov 2018, 3.0L, 6 cyl, 24V, DOHC, CRD, Triple Turbo, Diesel, F15 M50d, 280kW, EngCode: N57D30C

BMW > X5 > Nov 2013 - , 3.0L, 6 cyl, 24V, DOHC, CRD, Twin Turbo, Diesel, F15 xDrive 40d, 230kW, EngCode: N57D30T1

BMW > X5 > Nov 2013 - Sep 2014, 2.0L, 4 cyl, 16V, DOHC, CRD, Twin Turbo, Diesel, F15 25d, 160kW, EngCode: N47D20D

BMW > X5 > Oct 2014 - , 2.0L, 4 cyl, 16V, DOHC, CRD, Twin Turbo, Diesel, F15 25d, 170kW, EngCode: B47D20T

BMW > X6 > Jan 2015 - Jul 2019, 3.0L, 6 cyl, 24V, DOHC, CRD, Turbo, F16 x30d, 190kW, EngCode: N57D30A

BMW > X6 > Apr 2015 - , 3.0L, 6 cyl, 24V, DOHC, CRD, Twin Turbo, Diesel, F16 X40d, 230kW, EngCode: N57D30B