Emissions System for BMW 3 Series E90 (2006-2011)

BMW N54 3.0L Blow-By Vent Hose

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T#:594297

Part#: 11157553949

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$ 40.99 USD

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This hose directs the oil & combustion vapors from the valve cover and directs them to the intake manifold where they are put through combustion again in order to reduce emissions. When installing one of our N54 Oil Catch Cans the connections on this hose will often break. We recommend replacing this hose at the same time as your catch can. When doing any sort of repair or maintenance there is no replacement for genuine factory parts. Turner Motorsport carries the Genuine BMW brand with pride and has the parts you need to complete your next project with confidence.

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URO Front Oxygen Sensor - Bank 2 Pre-Cat - E82 E88 135i 1 M Coupe ...

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T#:9126159

Part#: 11787558087

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$ 96.29 USD

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This direct fit OEM Bosch oxygen sensor plugs directly into your factory connector. Fits N54 engine 1 series, 3 series and Z4. No cutting or splicing required. A new oxygen sensor can improve drivability and lengthen engine life.

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Rear Oxygen Sensor - Bank 2 Post-Cat

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T#:35863161

Part#: 11787545075

In Stock

$ 76.99 USD

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$ 76.99 USD

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The oxygen sensor is vital to the performance and drivability of your car. The engine computer relies on data from the sensor to make adjustments in engine efficiency and performance. When your BMW oxygen sensor fails, the computer can no longer sense the air/fuel ratio, so it ends up guessing -- resulting in poor performance, poor gas mileage, and increased pollution. Make sure your BMW engine performs as it should, and doesn't use more fuel than it needs to, by simply changing your oxygen sensor today. There is no lifespan on O2 sensors but there are several fault codes that indicate a failed sensor (O2 monitoring, cat efficiency, O2 heating circuit, O2 readiness, and others). The O2 sensor is heated and has a self-calibration feature so once you get the codes or feel performance has suffered, a new sensor is a good starting point to get you back to peak performance.

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Rein Crankcase Ventilation Return Pipe - E60, E90, Z4

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T#:402081

Part#: 11157567801

In Stock at Vendor

$ 81.38

This product was last offered at the strikethrough price on
08-13-2026

$ 78.99 USD

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$ 78.99 USD

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Located under intake manifold

URO Crankcase Vent Hose - 11157522931

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T#:26171673

Part#: 11157522931

In Stock

$ 39.79 USD

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$ 39.79 USD

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Connecting the cyclone oil separator to the engine valve cover, this hose is crucial for maintaining optimal engine performance. Over time, exposure to heat from engine components can cause the plastic hose to become brittle, resulting in cracks, tears, or splits. These issues can lead to vacuum and oil leaks, triggering a check engine light.

High-quality replacement for BMW crankcase vent hose
Ensures optimal engine performance
Resistant to heat and wear
Helps prevent vacuum and oil leaks
Easy to install

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URO Oxygen Sensor - For BMW N54 N55 N20 Engines

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T#:37925873

Part#: 11787589475

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$ 69.99 USD

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$ 69.99 USD

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URO Oxygen Sensor - For BMW N54 N55 N20 Engines

The URO Oxygen Sensor - For BMW N54 N55 N20 Engines is a high-quality replacement designed to restore proper oxygen sensor function and optimize the engine air-fuel mixture. This direct-fit OE replacement ensures seamless compatibility with factory components, providing accurate fuel metering for improved engine efficiency and emissions control. The plug-and-play design simplifies installation, allowing for a hassle-free replacement without modifications. Built from high-quality materials, this oxygen sensor is engineered to withstand extreme exhaust system temperatures, ensuring long-lasting durability and consistent performance. Featuring alloy conductors that minimize electrical resistance, it delivers precise readings for optimal fuel efficiency. Backed by a 24-month unlimited mileage warranty, it offers peace of mind for BMW owners seeking reliable performance.

Key Benefits:

Direct-fit OE replacement restores proper oxygen sensor function and fuel metering
Plug-and-play connection for quick and hassle-free installation
High-temperature resistant materials ensure long-lasting durability
Alloy conductors minimize electrical resistance for accurate sensor operation
24-month unlimited mileage warranty for added confidence

Upgrade your BMW N54, N55, or N20 engine with the URO Oxygen Sensor and experience improved efficiency, emissions control, and long-term reliability.

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URO Oil Separator Valve - BMW E60 E90 Z4 N52

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T#:592960

Part#: 11617531423

Ships in 2 Business Days

$ 57.12 USD

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he 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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Rein Crankcase Vent Hose

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T#:17804807

Part#: 11157522931

Ships in 2 Business Days

$ 44.99 USD

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$ 44.99 USD

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Manufactured with high-quality materials to withstand heat, dirt, oil, and other debris.

Secondary Air Injection Hose - Pump To Valve

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T#:594379

Part#: 11727557910

In Stock

$ 36.09

This product was last offered at the strikethrough price on
07-17-2026

$ 35.99 USD

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$ 35.99 USD

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Connects the air pump to the cold start valve.

Rein Crank Case Vent Hose - E60, E82, E83, E88, E90, E91, E92, E93, Z...

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T#:402018

Part#: 11157559528

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$ 48.99 USD

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$ 48.99 USD

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Over time this hose can become clogged and blocked up causing running problems. This is a direct factory replacement for the PCV hose.

URO Crankcase Ventilation Return Hose - 11157567801

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T#:26171675

Part#: 11157567801

In Stock

$ 39.99 USD

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$ 39.99 USD

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For your BMW's optimal performance, ensure the functionality of the hose connecting the oil dipstick to the crankcase vent valve. Positioned below the intake manifold, this hose is susceptible to clogging with oil film and condensation, leading to potential failure over time. Cracks and swelling in old hoses can result in oil and vacuum leaks, compromising engine performance.

Essential component for BMW engine functionality
Prevents clogging and potential hose failure
Minimizes oil and vacuum leaks
Convenient replacement when replacing crankcase vent valve

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Secondary Air Injection Pump - E82 E88 E90 E92 E93

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T#:2824948

Part#: 11727557903

Ships in 2 Business Days

$ 350.99 USD

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$ 350.99 USD

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The secondary air injection pump injects fresh air into the exhaust stream to help burn off harmful pollutants in the catalytic converter. If the injection pump begins to fail, since it is a vital part of the emissions system, a fault code will be triggered. Sometimes, when pulling off the lower secondary air pipe, you may see water pour out. This is a sign that your pump is more than likely faulty. By simply replacing this pump, efficiency can be restored and there will be no worry about failing an emissions test.

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Rein Crankcase Ventilation Hose - E60, E61, E90, E91

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T#:591594

Part#: 11157567802

Ships in 4 Business Days

$ 74.99 USD

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From oil separator to oil pan vent tube

OEM Rein Oil Separator Vent Hose - E60/61 E90/91 Z4

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T#:13029

Part#: 11617559530

Ships in 4 Business Days

$ 66.99

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

$ 43.99 USD

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$ 43.99 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. Replace this and all the other components of the oil separator system to prevent damage to all the aspects of your engine. As long as you have everything off, you can rest assured that new parts will last and be reliable.

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Rear Oxygen Sensor Set - N52, N54

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T#:55353594

Part#: 11787545074/5KT2

In Stock

$ 366.99 USD

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$ 366.99 USD

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Sluggish oxygen sensors do a lot more than just light up your dashboard with an annoying Check Engine Light—they directly choke your BMW’s performance.

Bosch Oxygen Sensor Set - Pre and Post Catalytic Converter - N55 ...

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T#:55857772

Part#: 11787589475KT2

In Stock

$ 335.99 USD

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$ 335.99 USD

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Extreme exhaust heat and carbon buildup degrade your factory oxygen sensors over time, sending lazy data to your DME and robbing you of performance.

Front Oxygen Sensor Set - E9x, E82, E88, Z4

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T#:55317713

Part#: BFR1/2O2SKT2

In Stock

$ 400.99

This product was last offered at the strikethrough price on
07-14-2026

$ 335.99 USD

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$ 335.99 USD

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Over time, that degradation robs your BMW of its crisp throttle response, tanks your fuel economy, and leaves you staring at a failed emissions ticket

Bosch Oxygen Sensors - Bank 1 And 2 Pre-Cat - N52

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T#:56110313

Part#: 11787558055KT

In Stock

$ 307.99

This product was last offered at the strikethrough price on
08-13-2026

$ 304.99 USD

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$ 304.99 USD

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Your engine's air fuel ratio needs to be dead on. Worn out factory pre-cat oxygen sensors delay vital data to the DME, leading to sub optimal fueling, lost horsepower, and dangerous hesitation under load.

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Crankcase Oil Separator and Vent Hose Kit - E90 325xi/330xi, E60 525x...

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T#:221962

Part#: TMS221962

Ships in 2 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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Oil Separator Valve

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T#:594299

Part#: 11617531423

Ships in 4 Business Days

$ 120.81 USD

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$ 120.81 USD

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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.

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OEM Rein Oil Separator Vent Hose - E60/1 E90/1 N52

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T#:402020

Part#: 11617522933

Ships in 2 Business Days

$ 19.99 USD

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$ 19.99 USD

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If your BMW has a damaged vent hose, be sure to replace it to restore functionality of this rather important emissions system.

Febi Rear Oxygen Sensor - Bank 1 Post-Cat

We Price Match - Give Us A Call or Chat!

T#:16375111

Part#: 11787526262

Special Order: No Guaranteed ETA

$ 124.99 USD

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$ 124.99 USD

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The oxygen sensor is vital to the performance and drivability of your car. The engine computer relies on data from the sensor to make adjustments in engine efficiency and performance. When your BMW oxygen sensor fails, the computer can no longer sense the air/fuel ratio, so it ends up guessing -- resulting in poor performance, poor gas mileage, and increased pollution. Make sure your BMW engine performs as it should, and doesn't use more fuel than it needs to, by simply changing your oxygen sensor today. There is no lifespan on O2 sensors but there are several fault codes that indicate a failed sensor (O2 monitoring, cat efficiency, O2 heating circuit, O2 readiness, and others). The O2 sensor is heated and has a self-calibration feature so once you get the codes or feel performance has suffered, a new sensor is a good starting point to get you back to peak performance. Febi's Oxygen sensors are high quality and will give you the longest and best performance for the price.

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OEM Febi Crankcase Ventilation Return Hose - E60 E90 Z4 N52 3.0L ...

We Price Match - Give Us A Call or Chat!

T#:38452821

Part#: 11157527570

Special Order: No Guaranteed ETA

$ 93.99 USD

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$ 93.99 USD

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For your BMW's optimal performance, ensure the functionality of the hose connecting the oil dipstick to the crankcase vent valve. Positioned below the intake manifold, this hose is susceptible to clogging with oil film and condensation, leading to potential failure over time. Cracks and swelling in old hoses can result in oil and vacuum leaks, compromising engine performance.

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Exhaust Pressure Sensor

T#:56580196

Part#: 13627808013

Special Order: No Guaranteed ETA

$ 26.99 USD

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$ 26.99 USD

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This Febi Bilstein sensor provides robust thermal stability and signal consistency required for daily driving and high-load demands alike.

Upstream NOx Sensor

T#:56254774

Part#: 13628589846

Special Order: No Guaranteed ETA

$ 312.99 USD

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$ 312.99 USD

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Maintain peak performance and emissions compliance on your BMW with this replacement upstream NOx sensor by Febi Bilstein.

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Emissions System for BMW 3 Series E90 (2006-2011)

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BMW N54 3.0L Blow-By Vent Hose

URO Front Oxygen Sensor - Bank 2 Pre-Cat - E82 E88 135i 1 M Coupe ...

Rear Oxygen Sensor - Bank 2 Post-Cat

Rein Crankcase Ventilation Return Pipe - E60, E90, Z4

URO Crankcase Vent Hose - 11157522931

URO Oxygen Sensor - For BMW N54 N55 N20 Engines

URO Oxygen Sensor - For BMW N54 N55 N20 Engines

Key Benefits:

URO Oil Separator Valve - BMW E60 E90 Z4 N52

Rein Crankcase Vent Hose

Secondary Air Injection Hose - Pump To Valve

Rein Crank Case Vent Hose - E60, E82, E83, E88, E90, E91, E92, E93, Z...

URO Crankcase Ventilation Return Hose - 11157567801

Secondary Air Injection Pump - E82 E88 E90 E92 E93

Rein Crankcase Ventilation Hose - E60, E61, E90, E91

OEM Rein Oil Separator Vent Hose - E60/61 E90/91 Z4

Rear Oxygen Sensor Set - N52, N54

Bosch Oxygen Sensor Set - Pre and Post Catalytic Converter - N55 ...

Front Oxygen Sensor Set - E9x, E82, E88, Z4

Bosch Oxygen Sensors - Bank 1 And 2 Pre-Cat - N52

Crankcase Oil Separator and Vent Hose Kit - E90 325xi/330xi, E60 525x...

Oil Separator Valve

OEM Rein Oil Separator Vent Hose - E60/1 E90/1 N52

Febi Rear Oxygen Sensor - Bank 1 Post-Cat

OEM Febi Crankcase Ventilation Return Hose - E60 E90 Z4 N52 3.0L ...

Exhaust Pressure Sensor

Upstream NOx Sensor

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