BMW Engine Parts for BMW E90 M3 S65 4.0L

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

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T#:580385

Part#: B8800072

In Stock

Sale - Save 25% $ 37.99

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

$ 28.49 USD

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$ 37.99

This product was last offered at the strikethrough price on
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$ 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.

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

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T#:580400

Part#: B8800089

In Stock

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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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.

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

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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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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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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 1-2 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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407 Piece O-Ring Assortment

T#:1809147

Part#: W5202

In Stock at Vendor

$ 21.99 USD

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$ 21.99 USD

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Nitrile Butadiene Rubber

3/8" Dr. 5/8" Extended Spark Plug Socket

T#:2242226

Part#: W80533

Ships in 1 Business Day

$ 20.25 USD

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$ 20.25 USD

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Extended socket length reaches confined areas.

Piston Ring Comp 3-1/2" to 7"

T#:2242223

Part#: W80573

Ships in 1 Business Day

$ 22.99 USD

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$ 22.99 USD

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Use to install pistons on most passenger cars and truck engines

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

Piston Ring Comp 2-1/8" to 5"

T#:2242222

Part#: W80572

Ships in 1 Business Day

$ 21.99 USD

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$ 21.99 USD

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Use to install pistons on most passenger cars and truck engines

6pc Hook & Pick Set

T#:1855974

Part#: W942

Ships on Dec 15, 2026

$ 8.99 USD

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$ 8.99 USD

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Includes straight, angled and combination picks

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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419 Piece Metric O-Ring Assortment Kit

T#:641935

Part#: WLMW5203

In Stock

$ 19.99 USD

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$ 19.99 USD

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Many uses around the garage and home

Spark Plug Gap Gauge

T#:1855998

Part#: W80535

Ships in 1 Business Day

$ 1.99

This product was last offered at the strikethrough price on
08-26-2026

$ 1.54 USD

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$ 1.54 USD

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Easy to read markings to set gaps quickly and easily.

120 pc Fuse Assortment

T#:1809154

Part#: W5368

In Stock

$ 13.68 USD

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$ 13.68 USD

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A must for any toolbox.

Piston Ring Installer

T#:1809133

Part#: W80575

Ships in 1 Business Day

$ 17.62 USD

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$ 17.62 USD

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Comfortable vinyl grip handles.

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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Relief Valve For Media Blaster

10X Entries Into Our F80 M3 Sweepstakes

T#:640910

Part#: B1100031RELIEF

Special Order: No Guaranteed ETA

Sale - Save 25% $ 7.99

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

$ 5.99 USD

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$ 7.99

This product was last offered at the strikethrough price on
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$ 5.99 USD

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BMW Engine Parts for BMW E90 M3 S65 4.0L

Sub-Categories

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

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

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

Borescope Camera with Light For Phone

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

407 Piece O-Ring Assortment

3/8" Dr. 5/8" Extended Spark Plug Socket

Piston Ring Comp 3-1/2" to 7"

Bav Auto Ratcheting Serpentine Belt Wrench Kit

Piston Ring Comp 2-1/8" to 5"

6pc Hook & Pick Set

OEM INA Idler Pulley - Multiple BMWs

419 Piece Metric O-Ring Assortment Kit

Spark Plug Gap Gauge

120 pc Fuse Assortment

Piston Ring Installer

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

Relief Valve For Media Blaster

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