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Rein BMW Intake Boots & Hoses for BMW 3 Series F34 (2014+)

Clear BMW chassis

The intake boot provides a pathway for air from the air flow sensor to the intake manifold. On most BMWs the boot is made of rubber with an accordian shape that allows the engine to shift and vibrate. As with any rubber component the rubber can dry out and crack and that can lead to serious running and drivability issues. A crack in the boot means that air is entering the engine that is not being monitored by the airflow sensor. The engine computer relies on data from the airflow sensor to set the fuel mixture in the engine. Excess unmetered air can result in lean condition faults, rough running, misfires, and other performance issues. For misfire and lean condition faults, check your intake boots first.

As an alternative to the original rubber, we also offer silicone boots that are both stronger and last longer with a 4-layer silicone design. Samco silicone boots can also decrease your BMW's intake turbulence and restriction by replacing the accordian design with a smoothed internal surface. Samco boots are also perfect as part of a kit to eliminate the factory traction control system (sometimes called an ASC delete boot).

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Rein Cloth Braided Fuel/Vacuum Hose - Black - 5 Meter

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T#:378470

Part#: N203531-5

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06-09-2026

$ 59.84 USD

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Sale - Save 25%

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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

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Sale - Save 17% $ 38.99

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03-17-2026

$ 32.29 USD

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$ 32.29 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.

Rein Silicone Vacuum Hoses - Black - 5 Meters (3.5mm ID)

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T#:51848535

Part#: 51731257971-5M

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Sale - Save 5% $ 38.66

This product was last offered at the strikethrough price on
06-29-2026

$ 36.73 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.

Rein - Crankcase Vent Hose - F23 230i, G30 530eX, F33 430i

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T#:34080725

Part#: 11157623745

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Sale - Save 6% $ 43.99

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06-29-2026

$ 41.22 USD

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Rein - Crankcase Vent Hose is a high-quality replacement part specifically designed for BMW models to maintain proper engine ventilation. This vent hose is essential for regulating air pressure within the crankcase, preventing pressure build-up and reducing the risk of oil leaks or sludge formation. Engineered to meet or exceed OEM standards, the Rein - Crankcase Vent Hose ensures optimal engine performance and longevity. Available through Turner Motorsport, this direct-fit replacement part offers an easy installation solution for BMW owners looking to maintain their engine’s health.

Designed for BMW models, ensuring perfect fit and compatibility
Prevents pressure build-up, reducing the risk of oil leaks and engine damage
Helps reduce oil sludge formation, promoting cleaner engine operation
Manufactured from durable, high-quality materials for long-lasting performance
Direct-fit replacement for hassle-free installation without modifications
Meets or exceeds OEM specifications for superior reliability and performance

Keep your BMW’s engine running efficiently and smoothly with the Rein - Crankcase Vent Hose, a crucial component for maintaining proper crankcase ventilation.

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Rein Cloth Braided Fuel/Vacuum Hose - Black - 1 Meter

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T#:363139

Part#: N203531-1

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Sale - Save 5% $ 12.99

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06-29-2026

$ 12.34 USD

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$ 12.99

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Replace your cracked or frayed fuel or vacuum lines. 3.5mm ID

Rein Silicone Vacuum Hoses - Blue - 3 Feet

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T#:378472

Part#: 11731259996-1

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Sale - Save 5% $ 6.11

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06-29-2026

$ 5.80 USD

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$ 6.11

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Replace your cracked or frayed vacuum lines. 3.5mm

Rein Silicone Vaccum Hose - Black - 65 Feet

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T#:378475

Part#: 5173125797120BLK

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Sale - Save 5% $ 175.99

This product was last offered at the strikethrough price on
06-29-2026

$ 166.75 USD

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$ 175.99

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$ 166.75 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

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Sale - Save 5% $ 363.52

This product was last offered at the strikethrough price on
06-29-2026

$ 345.34 USD

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Sale - Save 5%

$ 363.52

This product was last offered at the strikethrough price on
06-29-2026

$ 345.34 USD

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Replace your cracked or frayed fuel or vacuum lines. 3.5mm ID

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