Emissions System

Comprehensive Constant Pressure Valve Replacement Kit

T#:557341

Part#: 11111318185TMSKT

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05-03-2026

$ 84.32 USD

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When your CPV O-ring fails it causes a slow oil leak on the passenger side of the engine, making an oily mess that frequently resembles a rear main seal leak. Replacing the CPV with an upgraded o-ring ensures a long-term solution to this common problem.

The factory o-ring over time fails from heat cycling and oil exposure due to the Buna rubber used in OEM o-rings, while the included Viton Fluoroelastomer is resistant to a much higher temperature to ensure prolonged life without leaking.

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Crank Case Vent Hose Kit - S63 4.4L Engine

T#:23913949

Part#: CRNKVENTKITKT

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$ 224.99 USD

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Elevate your S63 4.4L engine's capabilities with our meticulously designed Crank Case Vent Hose Kit. Crafted from premium-grade materials, this kit ensures superior ventilation, mitigating pressure accumulation within the engine, thereby enhancing its overall performance.

Engineered to precise specifications, our kit seamlessly replaces the OEM vent hoses, guaranteeing a perfect fit. By reducing stress on the engine, it prolongs its lifespan and maintains peak functionality. Rely on this kit to provide unparalleled performance and unwavering reliability for your S63 4.4L engine.

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Performance Oil Separator Kit - M52/S52

T#:51356040

Part#: 059015LA02KT2KT

Ships on Oct 5, 2026

Sale - Save 19% $ 104.99

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

$ 84.77 USD

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On M52/S52-equipped BMWs, the factory crankcase ventilation (CCV) system is a notorious weak link. Between brittle plastic corrugated hoses that crumble from heat soak and an internal cyclone diaphragm prone to tearing, a failing CCV leads to massive oil consumption, vacuum leaks, and that dreaded "howling" whistle.

This kit addresses these issues with all new components and hardware. Both oil separator hoses, the cyclone separator itself, the mounting grommet, and the retaining bolts are included. Servicing this system is guaranteed to restore performance lost as a result of worn CCV components.

Kit includes:

Cyclone Separator/Crankcase Pressure Regulator Valve High Performance Silicone Breather Hose Return Hose Mounting Grommet Hex Bolt (3)

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Engine Oil Separator Package - Level 2 - E46 325, E39 525i M54 ...

T#:24344785

Part#: M54OILSEPKT

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05-03-2026

$ 133.54 USD

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If you need to perform a complete oil separator system service, this Level 2 kit provides you with all of the main components necessary to service your engine oil separator system. This Level 2 kit includes the following: Oil Separator Hose from oil separator to dipstick tube Hose from oil separator to valve cover Hose from intake manifold back to the connector hose Hose from oil separator up to the intake manifold Throttle body gasket Throttle body inlet boot ICV rubber grommet Oil dipstick tube o-ring seal It is highly recommended to replace the oil dipstick tube with the updated design by BMW as this also a common place for sludge to build up.

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Turner Oil Separator Kit - E39 M54

T#:555298

Part#: 11617501566KT6

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05-03-2026

$ 147.02 USD

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The plastic hoses and oil separator can crack or become faulty, leading to vacuum leaks or oil leaks. This is caused by the stress the plastic components are exposed to during heating and cooling cycles, especially if the vehicle is not brought up to operating temperature during driving in cold weather climates.

This kit includes the needed hoses, oil separator, mounting grommet, and hardware.

Fits the following BMWs:
2000-2003 E39 BMW 530i

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Meyle - Oxygen Sensor - Bank 2, Pre-Cat - E82, E88, E9x, Z4 ...

T#:40512028

Part#: 11787558087

Ships on Dec 3, 2026

$ 151.99 USD

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Backed by Meyle’s high manufacturing standards for durability and reliability

Rear Bank 2 Post-Cat Oxygen Sensor - 490mm - E70 E83 E82/88 E9X (N5X ...

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T#:4934915

Part#: 3148030031

Ships on Dec 3, 2026

$ 112.99 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. This oxygen sensor for BMW's with the N52, N54, and N55 3.0L engines. This 490mm bank 2 oxygen sensor is mounted after the catalytic converter.

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Turner Oil Separator Valve Service Kit - E39 M5

T#:555299

Part#: 11151406788KT3

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$ 326.99 USD

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The rubber hoses and oil separator can crack or become faulty, leading to vacuum leaks or oil leaks. This is caused by the stress the components are exposed to during heating and cooling cycles, especially if the vehicle is not brought up to operating temperature during driving in cold weather climates.

This kit includes the needed hoses, oil separator, mounting grommet, and hardware.

Fits the following BMWs:
1998-2003 E39 BMW M5

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Rear Oxygen Sensor Set - N52, N54

T#:55353594

Part#: 11787545074/5KT2

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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.

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

T#:55317713

Part#: BFR1/2O2SKT2

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$ 400.99

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

$ 337.99 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

T#:56110313

Part#: 11787558055KT

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$ 307.99 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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Bosch Oxygen Sensor Set - Pre and Post Catalytic Converter - N55 ...

T#:55857772

Part#: 11787589475KT2

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$ 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.

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

T#:221962

Part#: TMS221962

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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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Condor Speed Shop M20 Coolant block off plate - E30 E28 E34 E21 E12 ...

T#:577861

Part#: M20BLK

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$ 39.99 USD

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Condor Speed Shop use's these in all of their spec cars to simplify the cooling system. These plates bolt to the back of the M20 head allowing you to delete the heater hose connection. Kit includes: 1 Block Off Plate 1 Gasket 1 Hose Block Off 2 Bolts 2 Washers This item fits: M20B20 1977–1981 E12 520/6 1979–1983 E21 320/6 1982–1984 E28 520 1982–1988 E28 520i 1983–1992 E30 320i 1988–1990 E34 520i M20B23 1977–1982 E21 323i 1982–1985 E30 323i M20B25 1986–1993 E30 325i, 325iS, 325iC and 325iX 1989–1990 E34 525i 1988–1991 Z1 M20B27 1982–1988 E30 325/325e/325es 1982–1988 E28 525e (or 528e in the US)

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O2 Sensor Bung and Plug

T#:339000

Part#: TEN9949O2S

Ships in 6 Business Days

Starting at $ 12.95 USD

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Starting at $ 12.95 USD

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This weld-in bung allows an O2 sensor to be screwed into your exhaust system. It's required for custom exhaust systems, and is also useful for air/fuel ratio measurements when dyno testing.

Oxygen Sensor

T#:55353609

Part#: 11787558054

Special Order: No Guaranteed ETA

$ 134.99 USD

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This Meyle pre-catalytic broadband oxygen sensor is a direct replacement for your tired, slow-responding factory sensor.

Turner Emissions Service Kit - E46 M3

T#:555304

Part#: 11157840446KT9

Ships on Nov 17, 2026

$ 413.99

This product was last offered at the strikethrough price on
07-06-2026

$ 412.99 USD

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$ 412.99 USD

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The hoses and oil separator can crack or become faulty, leading to vacuum leaks or oil leaks. This is caused by the stress the plastic components are exposed to during heating and cooling cycles, especially if the vehicle is not brought up to operating temperature during driving in cold weather climates.

This kit includes the needed hoses, oil separator, and hardware.

Fits the following BMWs:
09/2004-2006 E46 BMW M3 - Manual Transmission

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Turner Emissions Service Kit - E46 M3

T#:555305

Part#: 11157840446KT10

Ships on Nov 17, 2026

$ 284.99

This product was last offered at the strikethrough price on
07-06-2026

$ 282.99 USD

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$ 282.99 USD

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The hoses and oil separator can crack or become faulty, leading to vacuum leaks or oil leaks. This is caused by the stress the plastic components are exposed to during heating and cooling cycles, especially if the vehicle is not brought up to operating temperature during driving in cold weather climates.

This kit includes the needed hoses, oil separator, and hardware.

Fits the following BMWs:
2001-09/2004 E46 BMW M3 - Manual Transmission

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Meyle Exhaust Pressure Sensor

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T#:5958698

Part#: 13627805758

Special Order: No Guaranteed ETA

$ 69.99 USD

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$ 69.99 USD

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3 pin connector located in the dpf system to regulate emissions Wulf Gaertner Autoparts AG manufactures and markets automotive spare parts under its MEYLE brand. Since its foundation in 1958, Wulf Gaertner Autoparts has been an owner-operated, unlisted family business on the aftermarket scene. Since 1995, Wulf Gaertner Autoparts AG has been manufacturing and trading under its MEYLE brand. They pride themselves on top-grade quality-tested spare parts for passenger cars, vans and commercial vehicles.

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Meyle Oxygen Sensor - Post-Cat - E46 E39 X3 X5 Z3 Z4

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T#:5944219

Part#: 11781433940

Special Order: No Guaranteed ETA

$ 78.99 USD

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This is the post-cat oxygen sensor for cylinders 4-6 for BMW E46 E39 X3 X5 Z3 Z4. This item fits the following BMWs: 1999-3/2003 E46 BMW 323i 323ci 325xi 328i 328ci 330i 330ci 330xi 2001-3/2003 E46 BMW 325i 325ci only for cars with M54 engine 1999-2003 E39 BMW 528i 525i 530i 2004-2006 E83 BMW X3 2.5 - Bank 1 Only 2004-2006 E83 BMW X3 3.0i - Bank 1 - Automatic Transmission Only 2000-2006 E53 BMW X5 3.0i 1999-2002 Z3 BMW Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i 2003-2006 E85 BMW Z4 2.5i Z4 3.0i

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Meyle Rear Bank 1 Post-Cat Oxygen Sensor - 560mm - E70 E83 E82/88 E9X...

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T#:5944215

Part#: 11787545074

Special Order: No Guaranteed ETA

$ 116.99 USD

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$ 116.99 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. This is a Meyle oxygen sensor for BMW's with the N52, N54, and N55 3.0L engines. This 560mm bank 1 oxygen sensor is mounted after the catalytic converter. As a leading source of high-performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts. All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!

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Oxygen Sensor - Front Manifold - E60, E61, E71

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T#:4934916

Part#: 3148030044

Special Order: No Guaranteed ETA

$ 80.99 USD

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$ 80.99 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. This oxygen sensor is located in the rear position of the exhaust manifold

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Meyle Exhaust Pressure Sensor

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T#:5958676

Part#: 13627805152

Special Order: No Guaranteed ETA

$ 46.99 USD

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$ 46.99 USD

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One of the emission sensors that work with the diesel particulate filter Wulf Gaertner Autoparts AG manufactures and markets automotive spare parts under its MEYLE brand. Since its foundation in 1958, Wulf Gaertner Autoparts has been an owner-operated, unlisted family business on the aftermarket scene. Since 1995, Wulf Gaertner Autoparts AG has been manufacturing and trading under its MEYLE brand. They pride themselves on top-grade quality-tested spare parts for passenger cars, vans and commercial vehicles.

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Intake Manifold Cover (PCV)

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T#:594546

Part#: 11617501562

Special Order: No Guaranteed ETA

$ 55.99 USD

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An integral part of the emissions system, the PVC valve lets the crank case breathe. This allows proper intake and exhaust flow, resulting in proper running and operation. Often split from underhood heat and age, this vents excess oil into the engine compartment. Replace it now.

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Meyle Oxygen Sensor - Post-Catalytic - E36 318i M44, E38 750il, E53 X...

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T#:5973263

Part#: 11781739845

Special Order: No Guaranteed ETA

$ 88.99 USD

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$ 88.99 USD

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This direct-fit Meyle oxygen sensor (lambda sensor) plugs directly into your factory connector. Fits M44 engine 318i/is/ic and e38 750il M73N engine, and X5 4.4i 4.6is with M62 engine. No cutting or splicing is required. A new oxygen sensor can improve driveability and lengthen engine life. This is the post-catalytic converter oxygen sensor

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T#:55461391

Part#: 3148000070

Special Order: No Guaranteed ETA

$ 59.99

This product was last offered at the strikethrough price on
07-23-2026

$ 58.99 USD

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$ 58.99 USD

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If your turbocharged Ultimate Driving Machine isn’t getting real-time, accurate temperature readouts from the exhaust stream, the ECU instantly pulls timing, limits boost, and drops your car into limp mode

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Meyle Oxygen Sensor - Downstream - E60 528i/xi

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T#:5973259

Part#: 11787569968

Special Order: No Guaranteed ETA

$ 86.99 USD

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$ 86.99 USD

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The O2 sensor measures the amount of unburned fuel in the exhaust pipe to adjust fuel mapping for less emissions and better fuel economy. When malfunctioning, your MPG and performance can suffer. Replaced fairly easily, you can restore your performance and mileage quickly. Be sure to add anti-seize on the threads to prevent it from becoming a permanent part of the exhaust. Regularly scheduled maintenance as these tend to fail slowly. Wulf Gaertner Autoparts AG manufactures and markets automotive spare parts under its MEYLE brand. Since its foundation in 1958, Wulf Gaertner Autoparts has been an owner-operated, unlisted family business on the aftermarket scene. Since 1995, Wulf Gaertner Autoparts AG has been manufacturing and trading under its MEYLE brand. They pride themselves on top-grade quality-tested spare parts for passenger cars, vans, and commercial vehicles.

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MEYLE NOx Sensor - Urea Injection - BMW FXX, EXX

T#:52621848

Part#: MEX1581

Special Order: No Guaranteed ETA

$ 291.99 USD

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Maintain your BMW’s clean-diesel performance with the MEYLE MEX1581 NOx Sensor.

Part#: 11151705237KT1

Back Ordered

Sale - Save 6% $ 208.99

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

$ 196.41 USD

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Sale - Save 6%

$ 208.99

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

$ 196.41 USD

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The rubber hoses and oil separator can crack or become faulty, leading to vacuum leaks or oil leaks. This is caused by the stress the components are exposed to during heating and cooling cycles, especially if the vehicle is not brought up to operating temperature during driving in cold weather climates.

This kit includes the needed hoses, oil separator, and hardware.

Fits the following BMWs:
1999-2006 E53 BMW with M62 4.4L 4.6L

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