BMW Intake Parts for BMW 3 Series E91 (2006-2012)

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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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OEM Hengst Intake Air Filter - E82/88 E9X N52 3.0L
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
5X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat! Hengst is our preferred OEM filtration supplier!
Hengst - Corporate Logo
T#:582295
Part#: 13717542294
In Stock
$ 28.99 USD
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Dirty air filters can prevent air from getting to your engine, causing poor performance, low power, and even engine stalling. Luckily, this is a quick and easy fix! Just pop open your intake airbox, pull out the old filter, insert your brand new filter, and button everything back up. Once you start and drive your car, you'll immediately be able to feel a difference! We recommend Hengst filters whenever you are performing maintenance on your BMW. Hengst is an OEM filter supplier that provides filters to some of the biggest brands in the automotive world. We trust Hengst to offer only the highest quality air filters that give you superior filtration and will stand the test of time. Try out a Hengst filter for yourself and feel the difference!
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Oil Separator Valve
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Hengst - Corporate Logo
T#:22064583
Part#: AS815M
Ships on Jul 30, 2026
$ 64.99 USD
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BMW has an ongoing issue with oil separators freezing in cold weather if driving is done before the vehicle is fully warmed up. There is often a howling noise followed by numerous oil leaks. The crankcase breather valve is used to purge the oil vapor from the engine block into the valve cover. However, sometimes condensation can cause it to freeze, causing the entire oil separator system to fail, crack, and disintegrate.
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Crankcase Oil Separator and Vent Hose Kit - E90 325xi/330xi, E60 525x...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Packaged by Turner - Corporate Logo
T#:221962
Part#: TMS221962
Ships in 3 Business Days
$ 458.99 USD
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$ 458.99 USD
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The BMW N52 engine was deisgned with a crankcase vent system that relies on a heated oil separator valve to separate vapor from the liquid oil. Under ideal circumstances, the oil vapor would pass back into the intake and get burned up during normal combustion. The liquid oil would follow a path back down into the oil pan and be reused. This system is environmentally friendly but plagued with problems. The heating elements can fail or oil and carbon particles can block the oil separator valve. With no escape, the oil will continue to pool and collect in the valve cover or make its way into the combustion chamber leading to excessive oil consumption, blue smoke from the exhaust, idle and running issues. These issues are worse in colder climates where the freezing temperatures create an oil sludge condition that is impossible to clear. The plastic hoses can become brittle and crack which leads to vacuum leaks and oil leaks. Thankfully, the CCV is replaceable on the early N52 engines (2006 and some 2007 models) and should be inspected during a major service and any time the valve cover is off. Oil can also back up into the throttle body, which is easier to check than the oil separator itself. Later N52 engines do not have a serviceable oil vent as it is integrated into the valve cover and not a separate part.

This is a kit containing the oil separator, the vent hoses, and the intake manifold gaskets that are done during a typical oil separator replacement. Complete kit includes:
  • 11617531423, Genuine BMW oil separator
  • 11617559530, vent hose
  • 11157522931, oil separator hose
  • 11157567801, return hose
  • 11157537701, extraction hose
  • 11617547242, intake manifold gaskets (set of 6)
    The intake manifold must be removed to access the oil separator so new profile gaskets are included. We also recommend (but not required) a new oil separator fitting on the intake manifold because it's one of the heated elements that vaporizes the oil as it enters the intake.

    The oil separator can be replaced on its own but for a complete service we also recommend replacing the oil separator hoses and cleaning the valve cover. Any valve cover or intake manifold work should include a new oil separator valve.

    This kit fits the following BMWs:
    -10/2005 E90 BMW 325xi 330xi - Sedan
    -10/2005 E91 BMW 325xi - Wagon
    -10/2005 E60 BMW 525xi 530xi
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    Hengst Filter Element Priced Each - BMW E8X 1 series, E9X 3 series, E...
    affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
    Hengst - Corporate Logo
    T#:52868073
    Part#: 13717532754
    Ships on Jul 30, 2026
    New Item
    $ 33.99 USD
    Free Shipping on orders $49 and up
    Keep your vehicle maintenance simple and reliable with the Hengst E621L Air Filter.