BMW Intake Parts for BMW E46 M3 S54 (1999-2005)

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One thing drivers and cars have in common is the need for air. Induction systems provide a third of the critical necessities for engines to run, so giving your BMW the best way to breathe is paramount in engine performance. If you need to replace your filter, recharge your reusable pod filter, or upgrade your intake, turbos, or intercooler parts, everything can be found below. We have OEM replacements as well as aftermarket performance upgrades to keep your BMW pristine, powerful, and functioning at peak efficiency.

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BMW E46 Crankcase Pressure Regulator Valve | S54 3.2L Engine ...
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T#:39059262
Part#: 11157840446
Ships in 2 Business Days
$ 40.99 USD
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BMW E46 Crankcase Pressure Regulator Valve | S54 3.2L Engine is a crucial component that ensures proper crankcase ventilation by regulating oil vapor flow into the intake manifold, preventing excessive oil consumption and buildup. Designed specifically for BMW E46 models with the S54 3.2L engine, this valve helps maintain engine efficiency and performance. BMW engines are known to experience oil separator freezing in cold weather if not fully warmed up, which can lead to howling noises and oil leaks. To ensure a thorough repair, replacing the valve cover gasket when changing the separator is highly recommended.

  • Regulates crankcase pressure to prevent excessive oil consumption
  • Helps maintain proper engine ventilation for peak performance
  • Reduces the risk of oil separator freezing and associated leaks
  • Direct-fit replacement for BMW E46 models with S54 3.2L engine
  • High-quality materials ensure durability and long-lasting performance
  • Recommended to replace the valve cover gasket for a complete repair

Protect your BMW's engine from excessive oil consumption and leaks by replacing a failing crankcase pressure regulator valve with this premium-quality replacement.

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Rein Cloth Braided Fuel/Vacuum Hose - Black - 5 Meter
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T#:378470
Part#: N203531-5
Ships in 2 Business Days
$ 80.05 USD
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Replace your cracked or frayed fuel or vacuum lines. 3.5mm ID
Rein Silicone Vacuum Hoses - Blue - 5 Meters (3.5mm ID)
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T#:379090
Part#: 11731259996-5
In Stock
$ 38.99

This product was last offered at the strikethrough price on
03-17-2026

$ 33.99 USD
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$ 33.99 USD
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This silicone hose has an inner diameter of 3.5mm and outer diameter of 7.5mm, is blue in color, and arrives in a 5 Meter section that can be cut down to size.

Karbonius E46 M3 CSL (S54) Carbon Airbox - Gloss Finish
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Karbonius Composites - Corporate Logo
T#:35019964
Part#: E46AD02-CF-2
Ships on Jul 28, 2026
$ 2,349.00 USD
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$ 2,349.00 USD
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The ultimate intake for the E46 M3, made from prepeg carbon fiber in the same weave as the Genuine airbox for a OE look. The Karbonius airbox also features carbon fiber intake trumpets in place of the factory's plastic trumps, and are finished to a ultra smooth finish for perfect airflow.

OPTIONAL ESS E46 M3 Alpha-N E-Flash ECU Tuning Software

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Rein Silicone Vacuum Hoses - Black - 5 Meters (3.5mm ID)
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T#:51848535
Part#: 51731257971-5M
In Stock at Vendor
New Item
$ 38.66 USD
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This silicone hose has an inner diameter of 3.5mm and outer diameter of 7.5mm, is black in color, and arrives in a 5 Meter section that can be cut down to size.
Karbonius CSL Carbon Snorkel - E46 M3 (S54) - Gloss
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Karbonius Composites - Corporate Logo
T#:29931698
Part#: E46AD04-CF-2
Ships on Jun 29, 2026
$ 779.00 USD
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$ 779.00 USD
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Snorkel extension the allows ducting from CSL bumper to airbox, requires use of CSL style airbox and mounts like the factory flap unit.

Karbonius E46 M3 CSL (S54) Carbon Snorkel - Matte Finish
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Karbonius Composites - Corporate Logo
T#:35727834
Part#: E46AD04-CFM-2
Ships on Jun 29, 2026
$ 809.00 USD
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$ 809.00 USD
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Karbonius E46 M3 CSL (S54) Carbon Snorkel - 2x2 Weave and Matte Finish

Karbonius E46 M3 CSL (S54) Carbon Snorkel - 2x2 Weave and Matte Finish is the ultimate performance and style upgrade for BMW E46 M3 enthusiasts. This high-quality carbon fiber snorkel is designed to replicate the renowned CSL design, enhancing airflow efficiency and engine performance while providing a sleek, race-inspired aesthetic. Made with a premium 2x2 carbon fiber weave and finished with a durable matte coating, it offers the perfect balance of form and function. Available through Turner Motorsport, this component ensures authenticity and precision engineering for the discerning BMW owner.

Key Benefits

  • Precision-crafted for seamless fitment on BMW E46 M3 models
  • Improves airflow for optimized S54 engine performance
  • Constructed with a 2x2 carbon fiber weave for superior strength and lightweight durability
  • Matte finish adds a modern, sporty aesthetic to the engine bay
  • Inspired by the legendary CSL design for an authentic motorsport upgrade
  • Available exclusively from trusted BMW performance specialists, Turner Motorsport

Elevate your E46 M3’s performance and style with the Karbonius E46 M3 CSL (S54) Carbon Snorkel - 2x2 Weave and Matte Finish, a must-have for enthusiasts aiming to achieve the ultimate driving experience.

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CSL Air Box Race - S54
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Karbonius Composites - Corporate Logo
T#:7164824
Part#: E46AD03
Ships on Jul 13, 2026
$ 2,249.00 USD
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$ 2,249.00 USD
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Intake system made 100% in prepreg carbon fiber in autoclave

Karbonius E46 M3 CSL (S54) Carbon Airbox - Matte Finish
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Karbonius Composites - Corporate Logo
T#:39329313
Part#: E46AD02-CFM-2
Ships on Aug 25, 2026
$ 2,449.00 USD
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$ 2,449.00 USD
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The intake generates what is probably one of the best noises of any sports car. The Karbonius CSL Style Airbox weighs in at a scant 1.7kg. It is made with 100% prepreg carbon fiber and baked at 125º in an autoclave at their facility in Spain under ISO 9001 Management Quality System rules by qualified staff.
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Rein Cloth Braided Fuel/Vacuum Hose - Black - 1 Meter
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T#:363139
Part#: N203531-1
In Stock
$ 12.99 USD
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Replace your cracked or frayed fuel or vacuum lines. 3.5mm ID
Rein Silicone Vaccum Hose - Black - 65 Feet
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T#:378475
Part#: 5173125797120BLK
Ships in 4 Business Days
$ 175.99 USD
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$ 175.99 USD
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Replace your cracked or frayed vacuum lines. 3.5mm
Rein Cloth Braided Fuel/Vacuum Hose - Black - 20 Meter
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T#:378471
Part#: N203531-20
Ships in 4 Business Days
$ 363.52 USD
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$ 363.52 USD
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Replace your cracked or frayed fuel or vacuum lines. 3.5mm ID


Carbon Fiber OEM-Style Intake Manifold - E46 M3
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Karbonius Composites - Corporate Logo
T#:37521034
Part#: E46AD09-CF-2
Ships in 4 Business Days
$ 1,699.00 USD
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$ 1,699.00 USD
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The CSL Airbox is one of the most demanded improvements among BMW M3 E46 enthusiasts. That is both for performance gain and for the sound it brings to the car. On the other hand, it is a laborious, time-consuming, and expensive modification. For those who are looking for a similar sound to the CSL airbox but are not looking for HP gain, we have developed the Karbonius OEM Style S54 airbox. It is a simplified version of the CSL airbox, that, apart from a louder sound from the engine (+12 dB compared to plastic OEM), gives an awesome appearance and allows for easy installation using the stock elbow and MAF sensor. No need to remap! Regarding power increase, we got +4HP in a recent dyno test compared with the OEM airbox. Not really significant considering that dynos can have a 2% margin error. In conclusion, and pending new tests in the future, we can say no significant power increase and no HP loss. NOTES: Need to install with CSL Crankcase breather hose -- BMW # 11157833649) In SMG version, need to install a Genuine BMW CSL SMG Expansion Tank -- BMW # 21532282549 Fitment: BMW M3 E46 BMW Z4 M
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Rein Silicone Vacuum Hoses - Blue - 3 Feet
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T#:378472
Part#: 11731259996-1
In Stock
$ 6.11 USD
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Replace your cracked or frayed vacuum lines. 3.5mm