BMW Engine Parts for BMW E90 M3 S65 4.0L

Turner Titanium Magnetic Oil Drain Plug - Priced Each (M12x1.5) ...

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T#:591153

Part#: 026698TMS01-01

In Stock

Sale - Save 25% $ 56.99

This product was last offered at the strikethrough price on
06-14-2026

$ 42.74 USD

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This is a must-have for ALL BMWs, and simply installs in place of your existing drain plug. With every oil change you perform on your BMW, you'll be able to inspect for metal shavings and debris. Many times, if something is going wrong on your BMW's engine, the magnetic drain plug can give you an early warning. Our championship race team uses this info all the time (Ever find a piece of a valve spring in your oil? We have!) Be sure to get one now, and make the swap next oil change!

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Turner S65 WPC-Treated Race Series Rod Bearings - E9x M3

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T#:34147748

Part#: S65-WPC-RB

In Stock

Sale - Save 15% $ 564.99

This product was last offered at the strikethrough price on
06-14-2026

$ 480.24 USD

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Upgrade your engine build with Turner's WPC-treated Race Series Bearings, engineered for serious performance enthusiasts. Starting with ACL’s high-performance bearing shells, these Race Series bearings are built to withstand extreme RPMs and stress. Utilizing a "Duraglide" tri-metal construction and a high-strength overlay plate, these bearings offer superior oiling and heat resistance for high-RPM operation.

Our WPC-treated bearings take ACL’s already impressive design and enhance it even further. The WPC treatment process strengthens and smooths the bearing surface by firing high-speed, ultra-fine particles at the bearing shells, reducing friction and improving durability. This advanced surface treatment ensures smoother operation and improved heat dissipation, which are critical for any high-performance engine.

Key Features:

Duraglide Tri-Metal Construction: ACL's Race Series bearings feature a high-strength overlay for enhanced performance. Optimized Oiling: Designed to promote better oil flow during high-RPM conditions. Precise Fitment: Manufactured with OEM-level precision using micron tolerance machining. WPC-Treated for Strength: Surface treatment adds strength and reduces friction for improved engine performance. No Flash Plating: Allows for better heat transfer and bearing retention. Thermal Discharge Process: Smoother, stronger components through WPC’s unique thermal discharge technology. Enhanced Heat and Friction Resistance: Built to combat the biggest enemies of high-performance engines. Don’t settle for standard bearings—choose Turner Motorsport WPC-treated Race Series Bearings for the ultimate engine performance upgrade. Perfect for your next engine rebuild or rod bearing service!

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Turner Baffled Oil Catch Can - Standard Flow 6oz

10X Entries Into Our F80 M3 Sweepstakes

T#:38419077

Part#: 022798TMS01-01

In Stock

Sale - Save 25% $ 218.99

This product was last offered at the strikethrough price on
06-14-2026

$ 164.24 USD

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When we designed this catch we wanted to have the most function options available, the best separation method, and the easiest to service. The Turner engineered catch cans offer a pre-setup design based ion desired flow direction, however this does not limit you to this flow. The inner baffle orientation can be easily adjusted to flow in both directions in case you decide to move this catch can to a different vehicle. A 4 chamber system baffle system inside the catch can was engineered to create multiple changes in the direction of airflow within the separator to cause oil droplets to fall out of suspension before exiting the catch can. Having a closed / recirculated design reduces oil ingestion and promotes cleaner emissions and odor-less operation.

Our catch can was also designed with the idea that the cans fill level can easily be checked with a top mounted dipstick and an optional use bottom drain hole. The drain system comes complete with a valve and hose to be mounted at a lower area of the vehicle so when you're doing an oil change you can drain the catch can.

Features:

6061-T6 billet machined body, anodized black for lasting protection and appearance
Strategically positioned 4 chamber baffle system maximizes oil / air separation
Knurled and black anodized oil dipstick makes inspecting oil volume of reservoir clean and simple
Sealed with a pre-installed viton O-Ring
Includes 2.5mm allen key to remove baffle plates for cleaning
Engineered to create multiple changes in the direction of airflow within the separator to cause oil droplets to fall out of suspension before exiting the catch can
Closed / recirculated design reduces oil ingestion and promotes cleaner emissions and odor-less operation
Optional use drain hole - drain kit included!
Universal mounting kit

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Turner Baffled Oil Catch Can - Standard Flow 8oz

10X Entries Into Our F80 M3 Sweepstakes

T#:38419062

Part#: 022798TMS01-02

In Stock

Sale - Save 25% $ 218.99

This product was last offered at the strikethrough price on
06-14-2026

$ 164.24 USD

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$ 164.24 USD

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When we designed this catch we wanted to have the most function options available, the best separation method, and the easiest to service. The Turner engineered catch cans offer a pre-setup design based ion desired flow direction, however this does not limit you to this flow. The inner baffle orientation can be easily adjusted to flow in both directions in case you decide to move this catch can to a different vehicle. A 4 chamber system baffle system inside the catch can was engineered to create multiple changes in the direction of airflow within the separator to cause oil droplets to fall out of suspension before exiting the catch can. Having a closed / recirculated design reduces oil ingestion and promotes cleaner emissions and odor-less operation.

Our catch can was also designed with the idea that the cans fill level can easily be checked with a top mounted dipstick and an optional use bottom drain hole. The drain hole can be used with a valve and hose to be mounted at a lower area of the vehicle so when you're doing an oil change you can drain the catch can.

Features:

6061-T6 billet machined body, anodized black for lasting protection and appearance
Strategically positioned 4 chamber baffle system maximizes oil / air separation
Knurled and black anodized oil dipstick makes inspecting oil volume of reservoir clean and simple
Sealed with a pre-installed viton O-Ring
Includes 2.5mm allen key to remove baffle plates for cleaning
Engineered to create multiple changes in the direction of airflow within the separator to cause oil droplets to fall out of suspension before exiting the catch can
Closed / recirculated design reduces oil ingestion and promotes cleaner emissions and odor-less operation
Optional use drain hole (valve and hose sold separately, watch for our model specific drain kits!)

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Turner Baffled Oil Catch Can - Standard Flow 10oz

10X Entries Into Our F80 M3 Sweepstakes

T#:38419079

Part#: 022798TMS01-03

In Stock

Sale - Save 25% $ 208.99

This product was last offered at the strikethrough price on
06-14-2026

$ 156.74 USD

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$ 208.99

This product was last offered at the strikethrough price on
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$ 156.74 USD

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When we designed this catch we wanted to have the most function options available, the best separation method, and the easiest to service. The Turner engineered catch cans offer a pre-setup design based ion desired flow direction, however this does not limit you to this flow.

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WPC-Treated Race Series Main Bearings - Complete Set - BMW S65B40 ...

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T#:34147777

Part#: S65-WPC-MB

Back Ordered

Sale - Save 20% $ 608.99

This product was last offered at the strikethrough price on
06-14-2026

$ 487.19 USD

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$ 608.99

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$ 487.19 USD

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Upgrade your engine build with Turner's WPC-treated Race Series Bearings, engineered for serious performance enthusiasts. Starting with ACL’s high-performance bearing shells, these Race Series bearings are built to withstand extreme RPMs and stress. Utilizing a "Duraglide" tri-metal construction and a high-strength overlay plate, these bearings offer superior oiling and heat resistance for high-RPM operation.

Our WPC-treated bearings take ACL’s already impressive design and enhance it even further. The WPC treatment process strengthens and smooths the bearing surface by firing high-speed, ultra-fine particles at the bearing shells, reducing friction and improving durability. This advanced surface treatment ensures smoother operation and improved heat dissipation, which are critical for any high-performance engine.

Key Features:

Duraglide Tri-Metal Construction: ACL's Race Series bearings feature a high-strength overlay for enhanced performance. Optimized Oiling: Designed to promote better oil flow during high-RPM conditions. Precise Fitment: Manufactured with OEM-level precision using micron tolerance machining. WPC-Treated for Strength: Surface treatment adds strength and reduces friction for improved engine performance. No Flash Plating: Allows for better heat transfer and bearing retention. Thermal Discharge Process: Smoother, stronger components through WPC’s unique thermal discharge technology. Enhanced Heat and Friction Resistance: Built to combat the biggest enemies of high-performance engines. Don’t settle for standard bearings—choose Turner Motorsport WPC-treated Race Series Bearings for the ultimate engine performance upgrade. Perfect for your next engine rebuild or main bearing service!

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Aluminum Valve Cover Set - E9X M3 S65 4.0L

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T#:39835971

Part#: 11127848154KT

In Stock

Sale - Save 20% $ 907.99

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

$ 726.38 USD

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The factory magnesium valve covers on the S65 engine are known for developing micro-porosity, corrosion, and persistent oil leaks over time. This material is highly susceptible to oxidation, leading to unsightly surface imperfections, weakened gasket channels, and sealing issues that a simple gasket replacement won't fix.

Upgrade to this high-strength aluminum valve cover set, engineered as a direct-fit replacement for your aging OEM covers. Unlike magnesium, aircraft-grade aluminum offers superior durability, enhanced heat resistance, and complete immunity to the corrosion issues that plague factory covers. Whether you're refreshing a high-mileage M3 or seeking long-term reliability, this upgrade ensures a leak-free, worry-free solution for your S65.

Features:

Eliminates the common porosity and corrosion issues found in factory magnesium covers.

Helps maintain optimal engine temperatures and enhances long-term reliability.

Designed for an OEM-like installation without modifications.

Reduces the risk of oil leaks, ensuring a proper seal.

Resistant to oxidation and chemical exposure for a long-lasting clean look.

Replaces OEM Part Numbers: 11127848153 & 11127848154

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Performance S65 BE Bearings Rod Bearing & Rod Bolt Lvl2 Kit- E9X M3 ...

10X Entries Into Our F80 M3 Sweepstakes

T#:13463763

Part#: 11247838088DBEKT

Ships on Nov 2, 2026

$ 981.99 USD

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$ 981.99 USD

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BE Bearings, in collaboration with Clevite, a leading OE bearing manufacturer, has revolutionized rod bearings for your peace of mind. Our redesigned bearings offer enhanced clearance and feature a shift from the original tin-aluminum composition to lead-copper. This upgrade incorporates the cutting-edge Clevite Tri-Metal design and boasts a Tri-Armor™ coating, ensuring superior lubrication for wear prevention. Moreover, these softer bearings are gentler on your engine and more tolerant of foreign particles suspended in your oil. Additionally, this upgrade enables precise wear assessment through oil testing. Our comprehensive kit includes: Upper and lower BE Bearings upgraded rod bearings Essential hardware Oil filter Oil pan gasket RedLine assembly lube Secure your BMW E9X M3's engine with our rod bearing kit and enjoy peace of mind on the road.

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Alternator - 180amp

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T#:26438185

Part#: 12317837981

In Stock

Sale - Save 15% $ 304.99

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

$ 259.24 USD

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$ 304.99

This product was last offered at the strikethrough price on
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$ 259.24 USD

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Bav Auto Low Fuel Pressure Sensor - Multiple BMWs

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T#:639834

Part#: 13537614317

In Stock

Sale - Save 20% $ 52.99

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

$ 42.39 USD

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$ 42.39 USD

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This low-pressure fuel sensor is commonly a cause of an "Increased Emissions" warning on the idrive and for check engine (SES) lights on BMW's with the N54 6 cylinder turbo engine or the S65 V8 engine in the M3. It will also fit a limited number of cars with the N55 engine. This sensor can be traced to a number of drivability issues, including cold start running problems, misfires, stumbling, hesitations, and overall rough running. You will likely have a code for the misfires, rich condition, or for the sensor itself. In some cases, the combination of codes can bring about a limp mode. Replacing this sensor is an easy and inexpensive first step if you're having any of these issues. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.

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OEM INA Accessory Belt Tensioner Pulley - Water Pump/Alternator - BMW...

We Price Match - Give Us A Call or Chat!

T#:31059479

Part#: 11287838194KT

In Stock

$ 30.99 USD

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$ 30.99 USD

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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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Performance+ S65 BE Bearings Rod Bearing & ARP Rod Bolt Lvl3 Kit- E9X...

10X Entries Into Our F80 M3 Sweepstakes

T#:21702997

Part#: BEPE9XRODKT

In Stock

$ 1,341.99

This product was last offered at the strikethrough price on
10-07-2026

$ 1,272.99 USD

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$ 1,272.99 USD

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BE Bearings, in collaboration with Clevite, a renowned OE bearing manufacturer, has engineered a cutting-edge solution. Our redesigned bearings offer enhanced clearance and feature a transition from the original tin-aluminum composition to lead copper. This upgrade incorporates the state-of-the-art Clevite Tri-Metal design, complete with a Tri-Armor™ coating. The result? Improved lubrication for wear prevention, along with softer, more engine-friendly bearings that tolerate foreign particles suspended in your oil. Additionally, this enhancement enables precise wear assessment through oil testing. Our comprehensive kit includes: Upper and lower BE Bearings upgraded rod bearings Necessary hardware Oil filter Liquid Moly 10W 60, ensuring optimal engine lubrication Oil pan gasket RedLine assembly lube for smooth installation Protect your S65 engine from potential disasters with BE Bearings' Rod Bearing Upgrade Kit. Ensure your engine's longevity and performance with this expertly designed-solution.

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Performance S65 BE Bearings Rod Bearing & Rod Bolt Lvl3 Kit- E9X M3 (...

10X Entries Into Our F80 M3 Sweepstakes

T#:15644283

Part#: 11427837997KT

Ships on Nov 2, 2026

$ 1,165.99 USD

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$ 1,165.99 USD

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BE Bearings, in conjunction with Clevite, an OE bearing manufacturer, have redesigned and manufactured the bearings for greater clearance and have changed the original material composition from tin-aluminum to lead-copper. This upgrade incorporated the state-of-the-art Clevite Tri-Metal design and featured a Tri-Armor™ coating. This allows for the additional lubrication for wear prevention, plus, the softer bearings are better for your engine and are more tolerant of foreign particles suspended in your oil. Another benefit from this is that the oil can now be sent for testing to accurately gauge the amount of wear occurring in the engine. Kit includes Upper and lower BE Bearings upgraded rod bearings Hardware Oil filter Castrol TWS Edge Professional 10W 60 Oil pan gasket RedLine assembly lube

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Hella Hella Horn - High Tone

T#:592707

Part#: 2768551

In Stock

$ 30.99 USD

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$ 30.99 USD

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Disc Type High-Tone, 12 V, 400 Hz with Bracket

Hella Hella Horn - Low Tone

T#:590880

Part#: 2768082

In Stock

$ 36.99 USD

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$ 36.99 USD

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Disc Type Low-Tone, 12 V, 335 Hz with Bracket

OEM INA Accesory Belt Tensioner Pulley - Air Conditioner - BMW E9X M3...

For clockwise power steering pump

We Price Match - Give Us A Call or Chat!

T#:31092500

Part#: 11287838196KT

Ships in 1-2 days

$ 25.99 USD

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$ 25.99 USD

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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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AutoTecknic Dry Carbon Competition Oil Cap Cover - Type 1 - For Vario...

T#:39971047

Part#: BM-0007

In Stock

$ 64.99 USD

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$ 64.99 USD

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a precision-engineered, lightweight dry carbon fiber upgrade designed to enhance the engine bay of compatible BMW models with an aggressive motorsport look and easy OEM-style installation.

Bav Auto Intake Air Temperature Sensor - BMW E9X M3 S65

10X Entries Into Our F80 M3 Sweepstakes

T#:639824

Part#: 13627792203

Ships on Jan 11, 2027

$ 24.99 USD

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$ 24.99 USD

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This sensor provides your BMW's control unit with intake temperature readings in order to run optimally in any condition. If this sensor has failed, your BMW may be suffering from more performance loss than you realize. Replace your IAT sensor to ensure proper temperature readings and restore lost performance! From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.

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Ignition Service Kit - S65 E90, E92, M3

10X Entries Into Our F80 M3 Sweepstakes

T#:15677515

Part#: 12137841754-KT

Ships in 1-2 days

$ 2,264.99

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

$ 2,225.99 USD

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$ 2,225.99 USD

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Your ignition system will start to fail with age, which will ruin your fuel economy as well as your performance. Turner Motorsport has created a kit that includes new coils, plugs, and hardware. This particular kit utilizes OEM and aftermarket components. See kit contents tab for a complete list of included components

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Valve Cover Gasket Kit - E9x M3 S65

10X Entries Into Our F80 M3 Sweepstakes

T#:26505029

Part#: 11127838272KT2

Back Ordered

$ 376.99

This product was last offered at the strikethrough price on
08-07-2026

$ 365.99 USD

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$ 365.99 USD

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Enhance the performance and longevity of your BMW S65 engine with this all-inclusive valve cover gasket service kit!

This comprehensive kit addresses the common issue of deteriorating valve cover gaskets in the S65 engine. Over time, heat exposure and engine oil can cause these gaskets to degrade, leading to leaks that result in smoke and unpleasant odors from burning oil.

Engineered for seamless integration and hassle-free operation, this kit streamlines the valve cover gasket replacement process, saving you valuable time and money.

Kit Includes:

Genuine BMW Valve Cover Gaskets - Bank 1 (11127838271) & Bank 2 (11127838272)
8x URO Parts Plastic Spark Plug Tubes (11127835170)
26x NRW Design Silicone Valve Cover Grommet/Seal (replaces 11127841217)

Each component has been meticulously selected to ensure optimal durability and leak prevention. Whether you're a professional mechanic or a DIY enthusiast, rest assured that every part in this kit is of the highest quality and precision-engineered for peak performance.

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AutoTecknic - Carbon Competition Fuel Cap Cover - Various BMW and MIN...

T#:39971046

Part#: BM-0006-BCG

In Stock

$ 65.00 USD

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$ 65.00 USD

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AutoTecknic - Carbon Competition Fuel Cap Cover - Various BMW and MINI Models is a premium exterior upgrade crafted from genuine carbon fiber, designed to enhance the aggressive styling and performance aesthetic of compatible BMW and MINI vehicles with an easy, OEM-fit installation.

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ACL Rod Bearing Set - With Genuine BMW Bolts

10X Entries Into Our F80 M3 Sweepstakes

T#:15710769

Part#: 8B1580HSTDKT-KT

In Stock

$ 540.99 USD

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$ 540.99 USD

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Includes upper and lower bearing shells for a complete rod bearing replacement.

Hella Air Horn Kit

T#:592708

Part#: 3001651

Ships in 2 Business Days

$ 143.99

This product was last offered at the strikethrough price on
05-07-2026

$ 124.99 USD

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$ 124.99 USD

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Get noticed with this air horn kit from Hella!

Autel Autolink AL329

T#:2914116

Part#: AL329

Ships in 1 Business Day

$ 49.99 USD

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$ 49.99 USD

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OBDII Code Reader

OEM+ S65 WPC Bearing with ARP Rod Bolt Lv3 Kit- E9X M3 (LM)

10X Entries Into Our F80 M3 Sweepstakes

T#:22196336

Part#: BEARINGBOLTARPKT

In Stock

$ 1,860.99

This product was last offered at the strikethrough price on
10-07-2026

$ 1,791.99 USD

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$ 1,791.99 USD

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Includes WPC Treated Genuine BMW Bearings, ARP Connecting Rod Bolts, 9 Qts Liqui Moly GT1 10w-60 Oil, Genuine BMW Hardware and Redline Assembly Lube - 4 oz

S65 Timing Chain Kit - E90, E92, M3

10X Entries Into Our F80 M3 Sweepstakes

T#:55353596

Part#: 11317838479KT2

Ships in 3 Business Days

$ 1,495.99

This product was last offered at the strikethrough price on
08-17-2026

$ 1,481.99 USD

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$ 1,481.99 USD

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Complete Valve Cover Gasket Kit - BMW S65 4.0L

10X Entries Into Our F80 M3 Sweepstakes

T#:28869570

Part#: 11127838271TKT

Ships in 7 Business Days

$ 323.99

This product was last offered at the strikethrough price on
06-05-2026

$ 302.99 USD

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$ 302.99 USD

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If your valve cover is leaking oil or a bad seal is causing vacuum issues and check engine lights, we recommend replacing your seals with this complete valve cover gasket kit! This kit includes all of the main gaskets and o-ring seals used by BMW to seal your valve cover to the cylinder head. Included: Victor Reinz Left & Right Valve Cover Gaskets Genuine BMW Oil Separator Seal O-rings - Two Per Valve Cover Genuine BMW Crankshaft Position Sensor O-Rings - Two Per Valve Cover URO Spark Plug Tubes w/ Gaskets If you are not replacing your valve cover, we also recommend inspecting the grommets found on the valve cover bolts. Over time these can compress or split, leading to insufficient sealing of the valve cover to the cylinder head due to a lack of pressure. BMW does not offer these grommets separately from their individual valve cover bolts, but NRW Design came in clutch with their Silicone Valve Cover Grommet Kit.

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Bav Auto Crankshaft Position Sensor - Multiple BMWs

10X Entries Into Our F80 M3 Sweepstakes

T#:639826

Part#: 13627525015

Special Order: No Guaranteed ETA

$ 67.99 USD

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$ 67.99 USD

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This crankshaft position sensor provides the ECU with the engine speed signal. It is mounted in either the engine block or the bell housing of the transmission on most cars. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.

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OEM S65 WPC Bearing with Genuine BMW Rod Bolt Lvl3 Kit- E9X M3 (CS) ...

10X Entries Into Our F80 M3 Sweepstakes

T#:15677519

Part#: 112478345220KT

In Stock

$ 1,625.99 USD

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$ 1,625.99 USD

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Includes WPC Treated Genuine BMW Bearings, Genuine BMW Connecting Rod Bolts, 9 Qts OEM Castrol 10w-60 Oil, Genuine BMW Hardware and Redline Assembly Lube - 4 oz

Hella Horn - High-Tone

T#:592716

Part#: 7424011

In Stock

$ 17.99 USD

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$ 17.99 USD

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Upgrade the sound of your BMW or MINI with the Hella Horn - High-Tone. This high-quality horn delivers a powerful and attention-grabbing sound, enhancing safety on the road. Designed for easy installation, it provides a quick and effective way to improve the audible presence of your vehicle.

Powerful and attention-grabbing sound
Enhances safety on the road
Easy installation for convenience
Compatible with BMW and MINI models
High-quality construction for durability

Enhance the audible presence of your BMW or MINI with the Hella Horn - High-Tone, ensuring you're heard when it matters most.

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Hella Relay

T#:592718

Part#: 965400001

In Stock

$ 14.99 USD

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$ 14.99 USD

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12V 30A SPST relay with bracket

Hella Horn - Low-Tone

T#:28869559

Part#: 7424001

Ships in 5 Business Days

$ 17.99 USD

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Universal fit. Not direct fit.

OEM INA Idler Pulley - Multiple BMWs

For vehicles with a production date up to 04/2008

We Price Match - Give Us A Call or Chat!

T#:1626

Part#: 11287841228

In Stock

$ 18.99 USD

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$ 18.99 USD

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This is an OEM INA Upper Idler Pulley, also known as the roller pulley or deflection pulley. The upper and lower idler pulleys are known to be the primary sources for 'belt squealing'. The 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).

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Battery Tender Plus Advanced Battery Charging System

T#:49892371

Part#: BTT0210128

In Stock at Vendor

$ 69.99 USD

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$ 69.99 USD

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Active Autowerke - S65 Power Pulley DPK Belt Kit - E9X M3

For vehicles with production date from 6/2008

T#:50934275

Part#: 13-001D

Ships in 3 Business Days

$ 75.00 USD

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$ 75.00 USD

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Free Up Real S65 Power — Engineered the Turner Way Your S65 is already making the power. This kit simply lets you keep more of it. The Active Autowerke Power Pulley Kit for the BMW E9X M3 reduces parasitic drag at the crankshaft, trimming rotational mass and freeing up horsepower that would otherwise be consumed by accessory drive load. The result is a measurable increase in rear-wheel output without sacrificing the balance, cooling capacity, or long-term durability expected from a properly engineered BMW upgrade. The crank pulley is CNC-machined from billet 6061 aluminum and finished with a hard-coat anodize for durability under sustained high-RPM operation. Unlike undersized pulleys that compromise system function, this design maintains proper operating characteristics while delivering real-world gains. Late-2007 production E9X M3 models transitioned to a double-sided (DPK) A/C belt configuration. Rather than forcing a workaround, Active Autowerke developed a proper DPK-compatible solution — including the correct matched belt. Applicable kits also include a spare DPK belt for added insurance. Dyno testing on a Mustang chassis dyno confirms gains of 10–12+ rear-wheel horsepower on an otherwise stock vehicle. Installation is fully reversible and requires no permanent modification. Product Highlights 10–12+ RWHP gain verified on stock S65 engines Complete bolt-on system CNC-machined 6061 billet aluminum crank pulley Hard-coat anodized finish for durability Includes correct replacement drive and A/C belts Spare DPK belt included where applicable Compatible with manual and DCT-equipped E9X M3 Reduces parasitic drag and rotational mass Designed to maintain proper operating temperatures Works in conjunction with Active Autowerke performance software Available for single-sided and double-sided (DPK) belt configurations Fitment Information Confirm whether your E9X M3 is equipped with a single-sided or double-sided (DPK) A/C belt prior to ordering to ensure correct application. A properly engineered solution for enthusiasts who want measurable gains while preserving OEM-level refinement and reliability.

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BFI Transmission Mounts - Stage 1 - BMW E30 / E36 / E46 / E9X / Z3 / ...

T#:50934269

Part#: BFI-BMW-TRANS-01

Ships on Oct 30, 2026

$ 69.99 USD

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$ 69.99 USD

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This kit is a "must-have" for any E36, E46, or E9X owner looking to tighten up their drivetrain's foundation and ensure long-term mechanical reliability.

MaxiSys Ultra

T#:2914136

Part#: MSULTRA

Ships in 6 Business Days

$ 12,306.99 USD

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$ 12,306.99 USD

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The MaxiSys Ultra is Autel’s most ambitious diagnostics tablet designed to maximize technician intelligence.

S65 Ignition Service Kit - E9X M3

10X Entries Into Our F80 M3 Sweepstakes

T#:55569528

Part#: 12137841754KT5

Ships in 1-2 days

$ 2,245.99

This product was last offered at the strikethrough price on
09-14-2026

$ 2,220.99 USD

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$ 2,220.99 USD

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The Turner Motorsport S65 Ignition Service Kit restores ignition timing and ionic knock-sensing accuracy on the BMW E9X M3 S65 engine. Worn spark plugs alter cylinder electrical resistance, disrupting ionic current knock detection across the ignition coils. Replacing all eight NGK plugs, S65 coils, and applying AGS dielectric boot protector restores precise combustion and knock monitoring.

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Accessory Belt Service Kit w/ Kevlar Reinforced Belt - E9X M3 S65 ...

For vehicles with production date from 04/2008

10X Entries Into Our F80 M3 Sweepstakes

T#:23416553

Part#: 11287841529KT

Ships on Nov 12, 2026

$ 1,038.99 USD

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$ 1,038.99 USD

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Eliminate your squeaking accessory belt pulley and cracked drive belt with this upgraded accessory belt service kit! This kit includes ECS Kevlar Reinforced Drive Belts, tensioner assemblies, and new tensioner pulleys. ECS Tuning's Red Kevlar Accessory Belts are both an aesthetic improvement and a performance alternative to a traditional belt. Kevlar-reinforced belts experience less elongation over time minimizing the amount of belt adjustment needed as well as offering a higher shock and impact resistance compared to OEM-style belts. Refreshing the rollers and/or tensioners simultaneously is a great way to ensure all vital components of your drive belt system are functioning optimally for years to come!

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King X-Series Bearings S65 Performance Rod Bearing Replacement Kit ...

10X Entries Into Our F80 M3 Sweepstakes

T#:56218624

Part#: CR8066GPCXKT2

Ships on Nov 2, 2026

$ 1,219.99

This product was last offered at the strikethrough price on
10-08-2026

$ 1,217.99 USD

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$ 1,217.99 USD

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We built this S65 Rod Bearing Refresh Kit to deliver proven reliability under severe operating conditions. Anchored by King’s X-series Coated GPC Rod Bearings, this kit utilizes specialized polymer coatings to resist scuffing, handle elevated oil temperatures

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King Bearings S65 Performance Rod Bearing Replacement Kit

10X Entries Into Our F80 M3 Sweepstakes

T#:56218621

Part#: CR8066GPCKT2

Ships on Nov 2, 2026

$ 1,219.99

This product was last offered at the strikethrough price on
10-08-2026

$ 1,217.99 USD

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$ 1,217.99 USD

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We built this S65 Rod Bearing Refresh Kit to deliver proven reliability under severe operating conditions. Anchored by King’s Coated GPC Rod Bearings, this kit utilizes specialized polymer coatings to resist scuffing, handle elevated oil temperatures

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S65 High Performance Rod Bearing And Bolt Set - E9x

10X Entries Into Our F80 M3 Sweepstakes

T#:55857735

Part#: S65BABKT2

Ships on Nov 2, 2026

$ 547.99 USD

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$ 547.99 USD

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We’ve packaged the ultimate preventative maintenance solution to keep your high-revving 4.0L V8 screaming all the way to its 8,400 RPM redline with peace of mind. This kit combines the industry's most trusted bearings with high-strength fasteners to eliminate the S65’s biggest Achilles' heel.

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BMW Engine Parts for BMW E90 M3 S65 4.0L

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Enhance the performance and longevity of your BMW S65 engine with this all-inclusive valve cover gasket service kit!

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