BMW Engine Parts for BMW E90 M3 S65 4.0L

Aluminum Valve Cover Set - E9X M3 S65 4.0L

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T#:39835971

Part#: 11127848154KT

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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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Bav Auto Spark Plug Socket 12" x 5/8"

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T#:580385

Part#: B8800072

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Sale - Save 25% $ 37.99

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05-03-2026

$ 28.49 USD

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Magnetic insert holds the spark plug securely in place for easy installation. Works great on many twin can engines where the spark plugs are recessed deep in the cylinder head.

E9X M3 Left Valve Cover

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T#:19560853

Part#: 11127848154

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Sale - Save 15% $ 453.99

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

$ 385.89 USD

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$ 453.99

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$ 385.89 USD

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E9X M3 Right Valve Cover

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T#:19560852

Part#: 11127848153

In Stock

Sale - Save 15% $ 453.99

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

$ 385.89 USD

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$ 453.99

This product was last offered at the strikethrough price on
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$ 385.89 USD

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Bav Auto Fuel Level Sensor & Fuel Pump Lock Ring Tool - BMW & MINI ...

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T#:580400

Part#: B8800089

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Sale - Save 10% $ 72.99

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

$ 65.69 USD

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Used to remove fuel level and fuel pump lock rings properly to avoid damage.

Alternator - 180amp

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T#:26438185

Part#: 12317837981

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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

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$ 259.24 USD

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Bav Auto Low Fuel Pressure Sensor - Multiple BMWs

10X Entries Into Our F80 M3 Sweepstakes

T#:639834

Part#: 13537614317

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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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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...

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T#:31059479

Part#: 11287838194KT

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$ 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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Borescope Camera with Light For Phone

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T#:32450134

Part#: PHONEBORESCOPE

In Stock

Sale - Save 3% $ 58.99

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

$ 57.22 USD

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$ 57.22 USD

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The Borescope Inspection Camera offers 1920P HD resolution, a flexible 7.9mm probe, and a 16.4ft semi-rigid cable, making it ideal for inspecting hard-to-reach areas. Easily connect to IOS and Android devices, and use the IP67 waterproof probe for various applications, including automotive, plumbing, and home inspections.

Key Features:

1920P HD Resolution: Capture clear images and high-quality video at 1920x1440 resolution.
Easy Connection: Connect quickly to IOS 9.0+ and Android 7+ devices via the 'SUP-ANESOK' app.
Semi-Rigid Cable: 16.4ft cable offers a mix of flexibility and rigidity for precise inspections.
Waterproof Probe: IP67-rated, capable of operating underwater up to 3.28 feet for 1 hour.
Wide Applications: Suitable for automotive, plumbing, and home inspections, with adjustable brightness for low-light environments.

Includes:

Borescope Camera
Android Adapter
Lightning Port Adapter
USB Type-C Connector
16.4 ft. Semi-Rigid Cable
Magnet
Hook
Mirror
Protective Cap
Manual

WARNING: This product contains chemicals known to the state of California to cause cancer, birth defects, and/or reproductive harm. See above warning label as well as http://www.p65warnings.ca.gov for further information on Proposition 65 warnings.

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Hella Hella Horn - Low Tone

T#:590880

Part#: 2768082

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$ 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

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T#:31092500

Part#: 11287838196KT

Ships in 1 day

$ 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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Hella Hella Horn - High Tone

T#:592707

Part#: 2768551

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$ 30.99 USD

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$ 30.99 USD

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

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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Bav Auto Ratcheting Serpentine Belt Wrench Kit

10X Entries Into Our F80 M3 Sweepstakes

T#:580390

Part#: B8800077

In Stock

Sale - Save 7% $ 67.99

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

$ 62.99 USD

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Used to retract your serpentine belt tensioner. This kit includes 18mm, 5/8 in, 14mm, 13mm, 12mm, sockets and 3/8 in and 1/4 in drive adapters

Hella Air Horn Kit

T#:592708

Part#: 3001651

Ships in 1 Business Day

$ 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 Hella Crankshaft Position Sensor - Multiple BMWs

T#:2084

Part#: 13627839138

Special Order: No Guaranteed ETA

$ 99.99 USD

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$ 99.99 USD

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This crank shaft position sensor provides the ECU with the engine speed signal. OEM Hella sensors are a perfect replacement for faulty position sensors causing poor engine operation. It is mounted in the bell housing at about the 7 o'clock postion of the transmission on most cars. This sensor fits BMW E90 E92 E93 M3, E39 540i M5, E60 M5, E63 M6, E38 740i 740il 750il 1997-2001, E31 840ci 850ci, E52 Z8.

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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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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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$ 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

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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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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.