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Belt Tensioners

Belt tensioner failure is common in several BMWs. If your belt is still in good shape and the only critical component that you need to replace is your drive belt tensioner, we have quality OE aftermarket and Genuine BMW options available for your BMW.
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Ina - Corporate Logo
T#:2045
Part#: 11281748131
In Stock
$ 20.25 USD
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$ 20.25 USD
Free Shipping on orders $49 and up

This is an OEM INA tensioner pulley, also known as the adjusting pulley and lower pulley. This pulley is mounted on the belt tensioner near the center of the belt assembly. The upper and lower pulleys are known to be the primary sources for 'belt squealing'. This pulley is also encased in rubber which will crack over time. If left without service the rubber could fail completely, chucking the belt and leaving you stranded. Replacement is a very simple procedure and can be done anytime the fan is off the engine (belt replacement, water pump service, alternator replacement, etc).

This pulley is mounted along with the hydraulic belt tensioner but can be replaced on its own. It is used for the main drive belt on the M50-M54 family engines (M50, M50TU, M52, S52, M52TU, M54, M56, and S54 engines). This is the same belt that covers the water pump/alternator/power steering systems. Replacement is a very easy procedure (requires fan removal) and will have your engine purring in no time. Belt replacement is strongly recommended at the same time. If you have a mechanical belt tensioner, the pulley can only be replaced with a new tensioner.

OEM Schaeffler (INA, LuK, & FAG) is an engineering company that focuses on high-performance, precision manufacturing. With their individual brands INA, Luk, and FAG providing exceptionally high quality parts directly to BMW, as well as countless other automotive companies, their history of reliability and variety of offered parts makes Schaeffler a go-to replacement parts provider for all of us here at Turner Motorsport.

As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts.  All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!

If you need the hydraulic belt tensioner, click here.

This item is 70mm Diameter. Please check the diameter before ordering.

This tensioner pulley fits the following BMWs:
1991-1995 E34 525i (M50 engine)
1992-1999 E36 325i, 325is, 328i, 328is, 323is
1995-1999 E36 M3 (M3 3.0 & M3 3.2 liter)
1997-2003 E39 525i, 528i, 530i - Only for Hydraulic Tensioner
1999-2000 E46 323i, 323Ci, 328i, 328Ci - Only for Hydraulic Tensioner
2001-2005 E46 325i, 325Ci, 325xi, 330i, 330Ci, 330xi - Only for Hydraulic Tensioner
2001-2006 E46 M3 coupe & convertible - Only for Hydraulic Tensioner
2000-2006 X5 3.0 liter (E53 chassis)
2004 E60 525i, 530i (M54 engine)
1997-2002 Z3 & MZ3 2.5, 2.8, 3.0, M Roadster, M Coupe
2003-2009 Z4 M Coupe and Roadster

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OEM INA Accessory Belt Tensioner Assembly - N55 S55
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Ina - Corporate Logo
T#:394063
Part#: 11288604266
In Stock
$ 79.99

This product was last offered at the strikethrough price on
06-08-2026

$ 60.99 USD
Free Shipping on orders $49 and up
$ 60.99 USD
Free Shipping on orders $49 and up

Pulleys begin to squeak once they are reaching the end of their life span and the tensioners can fail, no longer applying enough tension to the accessory belt. If not replaced, tese can seize up and lead to a long host of problems that would leave you stranded on the side of the road. Prevent this with routine maintenance and replace your belts and pulleys every 50,000 miles to ensure continued reliability.

Fits the following BMW chassis:
F22/23 F87 F3X F07/10/11 F06/12/13 F01/02 F25/26 E70/71 F15/16

Fits the following BMW engines:
N55 3.0L, S65 3.0L

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OEM INA Timing Belt Tensioner Roller -- E21 E30 E12 E28 E34
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Ina - Corporate Logo
T#:348865
Part#: 11311711153
In Stock
$ 54.99 USD
Free Shipping on orders $49 and up

This is an OEM INA timing belt tensioner that keeps pressure on the engines timing belt and prevents its from slipping out of time. OEM replacement for BMW part # 11311711154 and 11311711153.

OEM Schaeffler (INA, LuK, & FAG) is an engineering company that focuses on high-performance, precision manufacturing. With their individual brands INA, Luk, and FAG providing exceptionally high quality parts directly to BMW, as well as countless other automotive companies, their history of reliability and variety of offered parts makes Schaeffler a go-to replacement parts provider for all of us here at Turner Motorsport.

As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts.  All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!

 

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OEM INA A/C Belt Tensioner - BMW E36 E39 M50 M52 S50 S52
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Ina - Corporate Logo
T#:579839
Part#: 5330001100
Ships in 1 Business Day
$ 61.11 USD
Free Shipping on orders $49 and up
$ 61.11 USD
Free Shipping on orders $49 and up
Provides tension between crank pulley and A/C compressor

OEM INA Accessory Belt Tensioner Assembly - BMW N20 2.0L
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Ina - Corporate Logo
T#:587382
Part#: 11287594969
In Stock
$ 72.99

This product was last offered at the strikethrough price on
04-15-2026

$ 43.99 USD
Free Shipping on orders $49 and up
$ 43.99 USD
Free Shipping on orders $49 and up
This is the main belt tensioner for the accessory belt.
Ina - Corporate Logo
T#:12942
Part#: 11281709613
In Stock
$ 40.99 USD
Free Shipping on orders $49 and up
$ 40.99 USD
Free Shipping on orders $49 and up

This is an OEM INA Hydraulic Tensioner. It provides pressure to the Water Pump and Alternator belt to assure maximum performance and prevent the belt from slipping, causing decreased cooling or low charge rates from the alternator.

OEM Schaeffler (INA, LuK, & FAG) is an engineering company that focuses on high-performance, precision manufacturing. With their individual brands INA, Luk, and FAG providing exceptionally high quality parts directly to BMW, as well as countless other automotive companies, their history of reliability and variety of offered parts makes Schaeffler a go-to replacement parts provider for all of us here at Turner Motorsport.

As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts.  All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform.

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Ina - Corporate Logo
T#:31059479
Part#: 11287838194KT
Ships on Aug 28, 2026
$ 30.99

This product was last offered at the strikethrough price on
08-11-2026

$ 21.99 USD
Free Shipping on orders $49 and up
$ 21.99 USD
Free Shipping on orders $49 and up
If your water pump or alternator belt tensioner has failed because of the pulley or bearing, this replacement pulley is all you need to get your BMW back on the road! BMW and other brands usually sell the tensioner with the metal arm included, which increases the cost, even though the arm often doesn't need replacement. This OEM replacement is a much more affordable option, saving you $150 or more compared to the Genuine BMW tensioner.
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OEM INA A/C Belt Hydraulic Tensioner -- E39 E38 E31 E53
We Price Match - Give Us A Call or Chat!
Ina - Corporate Logo
T#:362596
Part#: 11281745545
In Stock
$ 51.99

This product was last offered at the strikethrough price on
06-16-2026

$ 50.59 USD
Free Shipping on orders $49 and up
$ 50.59 USD
Free Shipping on orders $49 and up

This is an OEM INA Hydraulic Tensioner. It provides pressure to the A/C belt to assure maximum performance out of the A/C compressor and prevent the belt from slipping.

OEM Schaeffler (INA, LuK, & FAG) is an engineering company that focuses on high-performance, precision manufacturing. With their individual brands INA, Luk, and FAG providing exceptionally high quality parts directly to BMW, as well as countless other automotive companies, their history of reliability and variety of offered parts makes Schaeffler a go-to replacement parts provider for all of us here at Turner Motorsport.

As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts.  All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform.

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Genuine BMW Hydraulic Belt Tensioner - BMW E34 M50
We Price Match - Give Us A Call or Chat!
Ina - Corporate Logo
T#:591480
Part#: 11281722789
In Stock
$ 64.99 USD
Free Shipping on orders $49 and up
This item has been superseded to 11287838797


Ina - Corporate Logo
T#:31092500
Part#: 11287838196KT
Ships in 1 day
$ 25.99 USD
Free Shipping on orders $49 and up
$ 25.99 USD
Free Shipping on orders $49 and up
If your air conditioning belt tensioner has failed because of the pulley or bearing, this replacement pulley is all you need to get your BMW back on the road! BMW and other brands usually sell the tensioner with the metal arm included, which increases the cost, even though the arm often doesn't need replacement. This OEM replacement is a much more affordable option, saving you $180 or more compared to the Genuine BMW tensioner.
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OEM INA A/C Tensioner Pulley -- E36 M44 M42, Z3 S52 M52
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Ina - Corporate Logo
T#:361134
Part#: 11282245087
Ships in 1 day
$ 44.99 USD
Free Shipping on orders $49 and up

This is an OEM INA A/C tensioner for the serpentine belt on your BMW. This tensioner keeps the belt for the Air Conditioning taught to provide maximum performance of each system.

OEM Schaeffler (INA, LuK, & FAG) is an engineering company that focuses on high-performance, precision manufacturing. With their individual brands INA, Luk, and FAG providing exceptionally high quality parts directly to BMW, as well as countless other automotive companies, their history of reliability and variety of offered parts makes Schaeffler a go-to replacement parts provider for all of us here at Turner Motorsport.

As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts.  All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!

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Ina - Corporate Logo
T#:11808
Part#: 11287512758
In Stock
$ 56.99 USD
Free Shipping on orders $49 and up
$ 56.99 USD
Free Shipping on orders $49 and up
This is an OEM INA mechanical tensioner for 2003+ BMW's with the M54 or M56 engine. These belt tensioner units are known to fail, and include the tensioner pulley (as shown). OEM Schaeffler (INA, LuK, Ruville, & FAG) is an engineering company that focuses on high-performance, precision manufacturing. With their individual brands INA, Luk, and FAG providing exceptionally high-quality parts directly to BMW, as well as countless other automotive companies, their history of reliability and variety of offered parts makes Schaeffler a go-to replacement parts provider for all of us here at Turner Motorsport. As a leading source of high-performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts. All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!
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Ina Water Pump/Alternator Tensioner Pulley - E34, E38, E39
We Price Match - Give Us A Call or Chat!
Ina - Corporate Logo
T#:589744
Part#: 11281731838
In Stock at Vendor
$ 41.38 USD
Free Shipping on orders $49 and up
$ 41.38 USD
Free Shipping on orders $49 and up
Keep your alternator turning properly.
Ina Tensioner Damper - E31, E32
We Price Match - Give Us A Call or Chat!
Ina - Corporate Logo
T#:591613
Part#: 11281715626
Ships in 7 Business Days
$ 48.99 USD
Free Shipping on orders $49 and up
Keeps proper tension on your accessory belt
Packaged by Turner - Corporate Logo
T#:15710833
Part#: 11287838797-KT
Ships in 1-3 days
Sale - Save 1% $ 165.99

This product was last offered at the strikethrough price on
05-03-2026

$ 163.64 USD
Free Shipping on orders $49 and up
Sale - Save 1%
$ 165.99

This product was last offered at the strikethrough price on
05-03-2026

$ 163.64 USD
Free Shipping on orders $49 and up
The original mechanical design is has been discontinued by BMW. So now Turner offers this complete hydraulic tensioner conversion kit for your BMW alternator/water pump/power steering belt. Changes the old style mechanical design to the updated hydraulic design recommended by BMW. Includes the following parts Hydraulic Tensioner Adjusting Pulley Caps & Dust Guards Securing Hardware
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OEM Schaeffler Belt Tensioner Assembly - BMW E90 335d M57
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Ina - Corporate Logo
T#:393576
Part#: 11287786880
In Stock
$ 72.99 USD
Free Shipping on orders $49 and up
Keeps the accessory belt porperly tensioned to prevent slippage of the belt.

Idler Pulley for Water Pump / Alternator Belt - INA
We Price Match - Give Us A Call or Chat!
Ina - Corporate Logo
T#:579836
Part#: 5320293100
Ships in 1-2 days
$ 31.62 USD
Free Shipping on orders $49 and up
OEM LuK A/C Belt Tensioner -- M50 M52 S50 S52
We Price Match - Give Us A Call or Chat!
LUK - Corporate Logo
T#:369241
Part#: 11281717210
Ships in 7 Business Days
$ 67.99 USD
Free Shipping on orders $49 and up
$ 67.99 USD
Free Shipping on orders $49 and up

This is the oil-filled tensioner that keeps the main drive belt in the proper tension. Over time the piston seals inside allow fluid to leak out. The tensioner becomes frozen or inoperable. Replacement is the best corrective action to take. This can be done during any belt or pulley service or anytime the fan is off the engine.

OEM Schaeffler (INA, LuK, & FAG) is an engineering company that focuses on high-performance, precision manufacturing. With their individual brands INA, Luk, and FAG providing exceptionally high quality parts directly to BMW, as well as countless other automotive companies, their history of reliability and variety of offered parts makes Schaeffler a go-to replacement parts provider for all of us here at Turner Motorsport.

As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts.  All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!

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Ina Idler Pulley - E31, E34, E38, E39
We Price Match - Give Us A Call or Chat!
Ina - Corporate Logo
T#:591615
Part#: 11281731220
Ships in 1 Business Day
$ 59.12 USD
Free Shipping on orders $49 and up
$ 59.12 USD
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Runs on water pump and alternator belt
Ina - Corporate Logo
T#:361801
Part#: 11287549588
Ships in 1 day
$ 69.68 USD
Free Shipping on orders $49 and up

This is an OEM INA Water Pump Belt Tensioner. It provides pressure to the Water Pump/Alternator Belt to assure maximum performance out of the water pump and alternator and prevent the belt from slipping causing reduced cooling and lower charge output from the alternator.

OEM Schaeffler (INA, LuK, & FAG) is an engineering company that focuses on high-performance, precision manufacturing. With their individual brands INA, Luk, and FAG providing exceptionally high quality parts directly to BMW, as well as countless other automotive companies, their history of reliability and variety of offered parts makes Schaeffler a go-to replacement parts provider for all of us here at Turner Motorsport.

As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts.  All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform.

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OEM INA Hydraulic Belt Tensioner -- E36 M42
We Price Match - Give Us A Call or Chat!
Ina - Corporate Logo
T#:18864
Part#: 11281247051
Ships in 1 day
$ 49.99

This product was last offered at the strikethrough price on
04-21-2026

$ 45.99 USD
Free Shipping on orders $49 and up
$ 45.99 USD
Free Shipping on orders $49 and up

Hydraulic Belt Tensioner for E36 4-cyl models with M42 engine. This is the oil-filled tensioner that keeps the main drive belt in the proper tension. Over time the piston seals inside allow fluid to leak out. The tensioner becomes frozen or inoperable. Replacement is the best corrective action to take. This can be done during any belt or pulley service or anytime the fan is off the engine.

OEM Schaeffler (INA, LuK, & FAG) is an engineering company that focuses on high-performance, precision manufacturing. With their individual brands INA, Luk, and FAG providing exceptionally high quality parts directly to BMW, as well as countless other automotive companies, their history of reliability and variety of offered parts makes Schaeffler a go-to replacement parts provider for all of us here at Turner Motorsport.

As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts.  All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!


This item fits the following BMWs:
BMW 3 Series - 318i, 318i Convertible, 318is, 318ti

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Ina - Corporate Logo
T#:393585
Part#: 12311713153
In Stock
$ 10.99 USD
Free Shipping on orders $49 and up

The OEM INA Tensioner Bearing allows the belt tensioner arm to rotate and apply pressure to the serpentine belt. With a bad bearing, the arm may seize up and prevent the tensioner from working properly.

OEM Schaeffler (INA, LuK, & FAG) is an engineering company that focuses on high-performance, precision manufacturing. With their individual brands INA, Luk, and FAG providing exceptionally high quality parts directly to BMW, as well as countless other automotive companies, their history of reliability and variety of offered parts makes Schaeffler a go-to replacement parts provider for all of us here at Turner Motorsport.

As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts.  All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform

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Ina - Corporate Logo
T#:42302019
Part#: FT30097
Ships in 7 Business Days
$ 113.99 USD
Free Shipping on orders $49 and up
Restore confidence in your BMW's accessory drive system with this Drive Belt Tensioner Kit from INA, including hardware tensioner and pulley!
OEM INA Deflection Pulley - MINI F5X F60
We Price Match - Give Us A Call or Chat!
Ina - Corporate Logo
T#:31622554
Part#: 11287649371
Ships in 7 Business Days
$ 53.99 USD
Free Shipping on orders $49 and up
Guides the serpentine belt and helps to provide tension.


Ina - Corporate Logo
T#:42234666
Part#: FP02931
Ships in 7 Business Days
$ 32.99 USD
Free Shipping on orders $49 and up
$ 32.99 USD
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Ensure your BMW’s accessory drive system remains efficient and reliable with the OEM INA Accessory Belt Idler Pulley, a dependable choice for preventative maintenance or repair.
Ina - Corporate Logo
T#:42167239
Part#: FB02061K
Back Ordered
$ 133.99 USD
Free Shipping on orders $49 and up
Perfect for preventive maintenance or replacing worn components, the Accessory Drive Belt Kit is an essential upgrade to maintain the performance and reliability of your BMW
Ina - Corporate Logo
T#:42302023
Part#: FT0482
Ships in 7 Business Days
$ 139.99 USD
Free Shipping on orders $49 and up
Replace your worn tensioner with the OEM INA Accessory Drive Belt Tensioner Assembly and keep your BMW’s engine running smoothly and efficiently with quality parts from Turner Motorsport.

Genuine MINI - Corporate Logo
T#:31522896
Part#: 11288479475
Ships in 1 day
8% off MSRP $ 197.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 181.99 USD
Free Shipping on orders $49 and up
8% off MSRP
$ 197.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 181.99 USD
Free Shipping on orders $49 and up

Packaged by Turner - Corporate Logo
T#:30430707
Part#: 112876318241KT2
Ships in 8 Business Days
$ 205.99 USD
Free Shipping on orders $49 and up

Don't let an accessory belt failure leave you stranded! Over time, the tensioner and belt wear out, risking your alternator's ability to charge and your vehicle's overall reliability. Turner Motorsport has assembled a comprehensive belt drive service kit to keep everything in check and ensure smooth operation.

Key Benefits:

Complete Service Kit: Includes all necessary components to maintain your belt drive system. Enhanced Reliability: Prevents unexpected belt failures and keeps your vehicle running smoothly. Optimized Performance: Ensures your alternator and A/C system function efficiently. Kit Contents:

Accessory Belt Belt Tensioner Assembly A/C Belt Maintain your BMW's performance and reliability with the Turner Motorsport drive belt service kit!

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Ina - Corporate Logo
T#:42302022
Part#: FT0571
Back Ordered
$ 95.99 USD
Free Shipping on orders $49 and up
Upgrade your accessory drive system with the INA Accessory Drive Belt Tensioner Assembly for various BMW and MINI models from Turner Motorsport and ensure your vehicle continues to perform at its peak.
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Ina - Corporate Logo
T#:42302021
Part#: FT0676
Back Ordered
$ 17.99 USD
Free Shipping on orders $49 and up
Maintain your MINI’s performance and prevent costly accessory drive failures with the OEM INA Accessory Drive Belt Pulley available now at Turner Motorsport.
Ina - Corporate Logo
T#:42302018
Part#: FT40505
Ships in 7 Business Days
$ 112.99 USD
Free Shipping on orders $49 and up
$ 112.99 USD
Free Shipping on orders $49 and up
Ensure your BMW continues to deliver smooth, reliable performance with the OEM INA Accessory Drive Belt Tensioner Assembly, available now from Turner Motorsport.