Emissions System

Comprehensive Constant Pressure Valve Replacement Kit

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T#:557341

Part#: 11111318185TMSKT

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$ 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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Performance Oil Separator Kit - M52/S52

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T#:51356040

Part#: 059015LA02KT2KT

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$ 83.70 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 ...

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T#:24344785

Part#: M54OILSEPKT

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$ 133.16 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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Crank Case Vent Hose Kit - S63 4.4L Engine

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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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Oil Separator kit - N63

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T#:56291074

Part#: 11158636540KT2

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$ 429.67 USD

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If your BMW is burning oil, showing unmetered air faults, or suffering from degraded throttle response, a compromised breather system is usually the culprit. The N63 Crankcase Breather Package pairs Genuine BMW oil separators with OE tier Rein connecting pipes. Designed to restore factory level oil separation and sealed vacuum integrity across both cylinder banks

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Burgaflex N52 Engine Breather Hose - 11157522931 - E9x, E60, E61 ...

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T#:57725177

Part#: 11157522931

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$ 52.99 USD

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Maintain peak engine health and keep your crankcase ventilation system operating seamlessly with this high-grade engine breather hose from Burgaflex.

Turner Oil Separator Kit - E39 M54

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T#:555298

Part#: 11617501566KT6

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$ 146.97 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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Turner Oil Separator Valve Service Kit - E39 M5

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T#:555299

Part#: 11151406788KT3

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$ 326.99

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$ 325.99 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

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T#:55353594

Part#: 11787545074/5KT2

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10-28-2026

$ 355.63 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.

Air Adjustment Unit/DISA Valve Kit

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T#:15677538

Part#: 11617533344-KT

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$ 122.12 USD

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A bad DISA valve can cause a variety of issues, from a loud racket in the engine bay, hesitation at low rpm and a rough idle with lean codes. If the valve is making a loud noise, we recommend replacing it as soon as possible. It is possible for the pin holding the flap to be sucked into the motor causing serious damage. Very easy to replace, just need to undo the 4 bolts holding it to the intake manifold. Includes new mounting hardware

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Burgaflex M52 M54 Crankcase Ventilation Hose (CCV) - 11157532649 - E4...

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T#:596606

Part#: 11157532649

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$ 12.99 USD

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Maintain peak engine health and precise air-fuel control by replacing your worn or cracked factory breather assembly with a premium Burgaflex replacement.

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

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T#:55857772

Part#: 11787589475KT2

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$ 342.99 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.

Cold Climate Oil Separator Kit - Level 2

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T#:15744065

Part#: 114317400450-KT

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$ 137.40 USD

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If you are ready to perform a truly complete oil separator system service, our Level 2 kit provides you with all of our Level 1 kit components plus a throttle body gasket, throttle body inlet boot, ICV grommet, and dipstick tube o-ring. Our Level 2 Cold Climate kit includes the following: Oil separator - BMW cold climate recommended Hose from oil separator to dipstick tube - BMW cold climate recommended 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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Burgaflex N63 Crankcase Ventilation Connecting Pipe (CCV) - Cylinders...

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T#:57725182

Part#: 11157646086

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$ 76.99 USD

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Keep your performance engine running cleanly and efficiently with the Burgaflex Crankcase Ventilation Connecting Pipe for Cylinders 1-4.

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

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T#:56110313

Part#: 11787558055KT

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$ 289.50 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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Oil Separator Kit - Level 1

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T#:15710823

Part#: E46M5411_61KT

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$ 93.71 USD

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Replace all the components of the oil separator system together 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. 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. ur Level 1 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

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

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T#:55317713

Part#: BFR1/2O2SKT2

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07-14-2026

$ 325.67 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

Burgaflex Return Pipe - 11617504536 - E46, E39, E60, E83, E53 ...

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T#:596611

Part#: 11617504536

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$ 17.99

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$ 13.99 USD

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Keep your vehicle running crisp and leak-free with this premium return pipe manufactured by Burgaflex.

Crankcase Ventilation Refresh Kit

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T#:57543744

Part#: 11158647962KT2

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09-29-2026

$ 211.22 USD

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Maintain optimal engine vacuum and prevent oil blow-by failures under hard driving with this complete Crankcase Ventilation Refresh Kit. Aged oil separator valves and heat stressed plastic hoses fail unexpectedly, leading to oil ingestion, loss of power, and damaged rear main or valve cover gaskets from excessive crankcase pressure buildup. Designed as a direct fit refresh, this kit ensures crisp throttle response, proper engine breathing, and total peace of mind on the street or track.

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Burgaflex M52 S52 Vent Hose - Crankcase-Ventilation / Oil Separator -...

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T#:57725180

Part#: 11151740393

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$ 5.99 USD

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Maintain your engine's operational integrity and keep vacuum leaks at bay with this essential replacement vent hose from Burgaflex.

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

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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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Burgaflex N62 Crankcase Ventilation Hose (CCV) - 11617563477 - E60, E...

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T#:2721004

Part#: 11617563477

Ships in 9 Business Days

$ 81.99 USD

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Maintain peak output and protect your vehicle from engine-robbing vacuum leaks with a high-performance replacement crankcase ventilation hose from Burgaflex.

Crankcase Vent Hose - Cylinders 5-8

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T#:641601

Part#: 11617547186

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$ 37.99 USD

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This Burgaflex hose provides a seamless replacement engineered for long-term durability and reliable performance under high thermal loads.

Burgaflex N52 Oil Separator Vent Hose (CCV) - 11617522933 - E9x, E60,...

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T#:57725199

Part#: 11617522933

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$ 20.99 USD

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The Burgaflex Oil Separator Vent Hose is built to high engineering standards to withstand the harsh thermal environments of a hard-driven engine bay.

Idle Control Valve Kit

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T#:15744026

Part#: 11611437453-KT

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$ 173.13 USD

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Located in the intake system, this part is a common source of idle issues. This kit includes a new mount and idle control valve grommet

O2 Sensor Bung and Plug

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T#:339000

Part#: TEN9949O2S

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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.

Burgaflex N62 Crankcase Vent Hose (CCV) - Cylinders 1-4 - 11617547185...

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T#:583521

Part#: 11617547185

Ships on Nov 23, 2026

$ 46.99 USD

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Maintain peak engine efficiency and track-ready performance by replacing degraded PCV components with the Burgaflex crankcase vent hose.

Turner Emissions Service Kit - E46 M3

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T#:555305

Part#: 11157840446KT10

Ships on Feb 24, 2027

$ 296.99

This product was last offered at the strikethrough price on
08-26-2026

$ 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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Turner Emissions Service Kit - E46 M3

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T#:555304

Part#: 11157840446KT9

Ships on Feb 24, 2027

$ 426.99

This product was last offered at the strikethrough price on
08-26-2026

$ 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 Oil Separator Kit - E53 X5 M62 4.4L 4.6L

10X Entries Into Our F80 M3 Sweepstakes Earn 5% back in Turner Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

T#:555308

Part#: 11151705237KT1

Back Ordered

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

$ 186.75 USD

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Sale - Save 11%

$ 208.99

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$ 186.75 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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