Dayco Automatic Belt Tensioner BMW 218i 220i 225i X1 Mini Cooper D S Countryman

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 > 218i > Nov 2014 - Mar 2018, 1.5L, 3 cyl, 12V, DOHC VVT, Direct FI, I/C Turbo, F45, 100kW, EngCode: B38A15A

BMW > 218i > Apr 2018 - , 1.5L, 3 cyl, 12V, DOHC VVT, Direct FI, I/C Turbo, F45, 103kW, EngCode: B38A15A, NZ

BMW > 220i > Jan 2015 - , 2.0L, 4 cyl, 16V, DOHC VVT, Direct Inj, I/C Turbo, F45, 141kW, EngCode: B48A20A

BMW > 225i > Nov 2014 - , 2.0L, 4 cyl, 16V, DOHC VVT, TMPFI, F45, 170kW, EngCode: B48A20O

BMW > X1 > Oct 2015 - , 2.0L, 4 cyl, 16V, DOHC VVT, TMPFI, Turbo, F48 25i, 170kW, EngCode: B48A20

BMW > X1 > Oct 2015 - , 2.0L, 4 cyl, 16V, DOHC VVT, CRD, Turbo, Diesel, F48 20d, 140kW, EngCode: B47C20

BMW > X1 > Dec 2015 - , 2.0L, 4 cyl, 16V, DOHC VVT, CRD, Turbo, Diesel, F48 18d, 110kW, EngCode: B47C20

BMW > X1 > Dec 2015 - , 2.0L, 4 cyl, 16V, DOHC VVT, TMPFI, Turbo, F48 20i, 141Kw, EngCode: B48A20

BMW > X1 > Jan 2017 - 2020, 1.5L, 3 cyl, 12V, DOHC VVT, TMPFI, I/C Turbo, F48 18i, 100Kw, EngCode: B38A15M

Mini > Cooper > Apr 2014 - , 1.5L, 3 cyl, 12V, DOHC VVT, FSI, F56, 100kW, EngCode: B38A15M

Mini > Cooper D > Apr 2014 - , 1.5L, 3 cyl, 12V, DOHC, CRD, Turbo, Diesel, F55 / F56, 85kW, EngCode: B37C15U

Mini > Cooper S > Apr 2014 - , 2.0L, 4 cyl, 16V, DOHC VVT, TFSI, F56, 141kW, EngCode: B48A20A

Mini > Cooper S > Nov 2015 - , 2.0L, 4 cyl, 16V, DOHC VVT, TFSI, F54, 141kW, EngCode: B48A20A

Mini > Cooper S > Nov 2015 - , 2.0L, 4 cyl, 16V, DOHC VVT, TFSI, F57, 141kW, EngCode: B48A20A

Mini > Cooper S > Nov 2015 - , 2.0L, 4 cyl, 16V, DOHC VVT, TFSI, F57, 141kW, EngCode: B48A20A

Mini > Countryman > Feb 2017 - , 2.0L, 4 cyl, 16V, DOHC, CRD, Turbo, Diesel, F60, 140kW, EngCode: B47C20A

Mini > Countryman > Feb 2017 - , 2.0L, 4 cyl, 16V, DOHC VVT, FSI, I/C Turbo, Diesel, F60, 140kW, EngCode: B48A20A

Mini > Countryman > Feb 2017 - , 2.0L, 4 cyl, 16V, DOHC VVT, FSI, Turbo, F60 JCW, 170kW, EngCode: B48A20B