BMW Intake Boots & Hoses for BMW 3 Series E46 (1999-2005)

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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 Silicone Vacuum Hoses - Blue - 5 Meters (3.5mm ID)
Rein Silicone Vacuum Hoses - Blue - 5 Meters (3.5mm ID)
TEST ETS TESTa TEST ETS TESTa TEST ETS TESTb TEST ETS TEST2 TEST ETS TESTa
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Rein - Corporate Logo
T#:379090
Part#: 11731259996-5
In Stock
$ 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. 1 1 1 1 1
Rein Cloth Braided Fuel/Vacuum Hose - Black - 5 Meter
Rein Cloth Braided Fuel/Vacuum Hose - Black - 5 Meter
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Rein - Corporate Logo
T#:378470
Part#: N203531-5
In Stock
$ 80.05

This product was last offered at the strikethrough price on
07-27-2026

$ 62.99 USD
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$ 62.99 USD
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Replace your cracked or frayed fuel or vacuum lines. 3.5mm ID
Rein Silicone Vacuum Hoses - Black - 5 Meters (3.5mm ID)
Rein Silicone Vacuum Hoses - Black - 5 Meters (3.5mm ID)
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Rein - Corporate Logo
T#:51848535
Part#: 51731257971-5M
In Stock
New Item
$ 38.99 USD
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$ 38.99 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.
Febi Intake Boot - Air Mass Sensor to Air Boot - E46 Z3
Febi Intake Boot - Air Mass Sensor to Air Boot - E46 Z3
For models with the M56 SULEV engine only - not compatible with the M54B25 engine.
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Febi - Corporate Logo
T#:593001
Part#: 13541438761
In Stock
$ 21.99 USD
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$ 21.99 USD
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This intake boot connects to the mass air sensor. If it becomes cracked or loose it can cause unmetered air to enter the engine and trigger a check engine light. This fits BMW E46 330i Z3 3.0i and E46 325i with M56 engine.
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Rein Air Intake Boot - E46, Z3
Rein Air Intake Boot - E46, Z3
For models with the M56 SULEV engine only - not compatible with the M54B25 engine.
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Rein - Corporate Logo
T#:379640
Part#: 13541438761
Ships in 1 Business Day
$ 28.99 USD
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$ 28.99 USD
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Connects mass airflow sensor to air intake tube
Febi Air Intake Boot - E46, Z3
Febi Air Intake Boot - E46, Z3
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Febi - Corporate Logo
T#:381822
Part#: 13541705209
Ships in 1 Business Day
$ 25.99

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

$ 24.99 USD
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$ 24.99 USD
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Connects directly to the MAF
Bremmen Air Intake Boot - E46 Z3 M52 M54
Bremmen Air Intake Boot - E46 Z3 M52 M54
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Bremmen Parts - Corporate Logo
T#:640143
Part#: 13541705209
In Stock
Sale - Save 22% $ 21.99

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

$ 17.13 USD
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Sale - Save 22%
$ 21.99

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

$ 17.13 USD
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This intake boot connects to the mass air sensor.
Rein Air Intake Boot - E46, Z3
Rein Air Intake Boot - E46, Z3
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Rein - Corporate Logo
T#:555163
Part#: 13541705209
In Stock
$ 17.99 USD
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$ 17.99 USD
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Connects directly to the MAF
Air Intake Boot
Air Intake Boot
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Bremmen Parts - Corporate Logo
T#:38676207
Part#: 13541435627
In Stock
Sale - Save 24% $ 15.99

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

$ 12.23 USD
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Sale - Save 24%
$ 15.99

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

$ 12.23 USD
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OEM Febi Air Intake Boot - E46, Z3 M54 3.0L
OEM Febi Air Intake Boot - E46, Z3 M54 3.0L
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Febi - Corporate Logo
T#:38419108
Part#: 13541438759
Special Order: No Guaranteed ETA
$ 25.99 USD
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$ 25.99 USD
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Located between the MAF sensor and the throttle body, this boot is a common source of CELs when the rubber cracks.
Air Intake Boot
Air Intake Boot
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Bremmen Parts - Corporate Logo
T#:39295550
Part#: 13541438759
In Stock
Sale - Save 22% $ 20.99

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

$ 16.31 USD
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Sale - Save 22%
$ 20.99

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

$ 16.31 USD
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Rein Silicone Vacuum Hoses - Blue - 3 Feet
Rein Silicone Vacuum Hoses - Blue - 3 Feet
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Rein - Corporate Logo
T#:378472
Part#: 11731259996-1
In Stock
$ 6.11 USD
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$ 6.11 USD
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Replace your cracked or frayed vacuum lines. 3.5mm
Rein Cloth Braided Fuel/Vacuum Hose - Black - 1 Meter
Rein Cloth Braided Fuel/Vacuum Hose - Black - 1 Meter
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Rein - Corporate Logo
T#:363139
Part#: N203531-1
In Stock
$ 12.99 USD
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$ 12.99 USD
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Replace your cracked or frayed fuel or vacuum lines. 3.5mm ID
OEM Rein Air Intake Boot - E46 Z3
OEM Rein Air Intake Boot - E46 Z3
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:386410
Part#: 13541438759
In Stock
$ 29.99

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

$ 14.99 USD
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$ 14.99 USD
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This intake boot connects directly to the throttle body. Susceptible to cracking over time, this boot could be the cause of a check engine light, showing that the engine is running lean, and rough idle issues.
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Rein Cloth Braided Fuel/Vacuum Hose - Black - 20 Meter
Rein Cloth Braided Fuel/Vacuum Hose - Black - 20 Meter
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:378471
Part#: N203531-20
Ships in 3 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
Febi Air Intake Boot - E39, E46, Z3
Febi Air Intake Boot - E39, E46, Z3
We Price Match - Give Us A Call or Chat!
Febi - Corporate Logo
T#:381821
Part#: 13541435627
In Stock at Vendor
$ 20.18

This product was last offered at the strikethrough price on
05-11-2026

$ 18.00 USD
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$ 18.00 USD
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Connects directly to the throttle body
Rein Silicone Vaccum Hose - Black - 65 Feet
Rein Silicone Vaccum Hose - Black - 65 Feet
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:378475
Part#: 5173125797120BLK
Ships in 3 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 Air Intake Boot - E39, E46, Z3
Rein Air Intake Boot - E39, E46, Z3
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:362650
Part#: 13541435627
In Stock
$ 16.99

This product was last offered at the strikethrough price on
06-11-2026

$ 14.99 USD
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$ 14.99 USD
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Connects directly to the throttle body

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