Emissions System

Comprehensive Constant Pressure Valve Replacement Kit

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#:557341

Part#: 11111318185TMSKT

In Stock

Sale - Save 2% $ 85.93

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

$ 84.32 USD

Add to Wish List

Qty

Sale - Save 2%

$ 85.93

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

$ 84.32 USD

Add to Wish List

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.

Show More Show Less

Bosch Fuel Tank Breather Valve - 13907643106

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#:18468288

Part#: 13907643106

In Stock

Sale - Save 5% $ 76.99

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

$ 73.14 USD

Add to Wish List

Qty

Sale - Save 5%

$ 76.99

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

$ 73.14 USD

Add to Wish List

Common CEL cause on B48/B58/S58. Get your fuel system functioning properly again!

Performance Oil Separator Kit - M52/S52

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#:51356040

Part#: 059015LA02KT2KT

In Stock

Sale - Save 20% $ 104.99

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

$ 83.70 USD

Add to Wish List

Qty

Sale - Save 20%

$ 104.99

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

$ 83.70 USD

Add to Wish List

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)

Show More Show Less

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

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#:24344785

Part#: M54OILSEPKT

In Stock

Sale - Save 23% $ 173.99

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

$ 133.16 USD

Add to Wish List

Qty

Sale - Save 23%

$ 173.99

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

$ 133.16 USD

Add to Wish List

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.

Show More Show Less

Oil Separator kit - N63

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#:56291074

Part#: 11158636540KT2

In Stock

$ 429.67 USD

Add to Wish List

Qty

$ 429.67 USD

Add to Wish List

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

Show More Show Less

Turner Oil Separator Kit - E39 M54

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#:555298

Part#: 11617501566KT6

In Stock

Sale - Save 19% $ 181.99

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

$ 146.97 USD

Add to Wish List

Qty

Sale - Save 19%

$ 181.99

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

$ 146.97 USD

Add to Wish List

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

Show More Show Less

Genuine BMW Vacuum Hose - E36 318ti 318is 318ic 318i M44 1.9L ...

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#:37499

Part#: 11731435862

Ships in 5 Business Days

Sale - Save 24% $ 29.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 22.93 USD

Add to Wish List

Qty

Sale - Save 24%

$ 29.99

This product was last offered at the strikethrough price on
05-02-2026

$ 22.93 USD

Add to Wish List

Genuine BMW Hose - 470mm
This item fits the following BMW Chassis:
E36

Fits BMW Engines including:
M44

Covering Outer - E36

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#:45102

Part#: 16131183047

Special Order: No Guaranteed ETA

Sale - Save 11% $ 30.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 27.58 USD

Add to Wish List

Qty

Sale - Save 11%

$ 30.99

This product was last offered at the strikethrough price on
05-02-2026

$ 27.58 USD

Add to Wish List

Genuine BMW Covering Outer - Akf/Run.Loss
This item fits the following BMW Chassis:
E36

Fits BMW Engines including:
M44,M50,M52,S52

Rear Oxygen Sensor Set - N52, N54

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#:55353594

Part#: 11787545074/5KT2

In Stock

Sale - Save 3% $ 366.99

This product was last offered at the strikethrough price on
10-28-2026

$ 355.63 USD

Add to Wish List

Qty

Sale - Save 3%

$ 366.99

This product was last offered at the strikethrough price on
10-28-2026

$ 355.63 USD

Add to Wish List

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

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#:15677538

Part#: 11617533344-KT

In Stock

Sale - Save 25% $ 162.99

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

$ 122.12 USD

Add to Wish List

Qty

Sale - Save 25%

$ 162.99

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

$ 122.12 USD

Add to Wish List

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

Show More Show Less

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

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#:55857772

Part#: 11787589475KT2

In Stock

$ 342.99 USD

Add to Wish List

Qty

$ 342.99 USD

Add to Wish List

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

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#:15744065

Part#: 114317400450-KT

In Stock

Sale - Save 41% $ 231.99

This product was last offered at the strikethrough price on
06-15-2026

$ 137.40 USD

Add to Wish List

Qty

Sale - Save 41%

$ 231.99

This product was last offered at the strikethrough price on
06-15-2026

$ 137.40 USD

Add to Wish List

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.

Show More Show Less

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

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#:56110313

Part#: 11787558055KT

In Stock

Sale - Save 6% $ 307.99

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

$ 289.50 USD

Add to Wish List

Qty

Sale - Save 6%

$ 307.99

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

$ 289.50 USD

Add to Wish List

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.

Show More Show Less

Oil Separator Kit - Level 1

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#:15710823

Part#: E46M5411_61KT

In Stock

Sale - Save 24% $ 123.99

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

$ 93.71 USD

Add to Wish List

Qty

Sale - Save 24%

$ 123.99

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

$ 93.71 USD

Add to Wish List

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

Show More Show Less

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

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#:55317713

Part#: BFR1/2O2SKT2

In Stock

Sale - Save 19% $ 400.99

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

$ 325.67 USD

Add to Wish List

Qty

Sale - Save 19%

$ 400.99

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

$ 325.67 USD

Add to Wish List

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

Crankcase Ventilation Refresh Kit

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#:57543744

Part#: 11158647962KT2

In Stock

Sale - Save 21% $ 265.99

This product was last offered at the strikethrough price on
09-29-2026

$ 211.22 USD

Add to Wish List

Qty

Sale - Save 21%

$ 265.99

This product was last offered at the strikethrough price on
09-29-2026

$ 211.22 USD

Add to Wish List

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.

Show More Show Less

Dinan Replacement Air Pump Filter - E60 M5, E63/E64 M6

Call In Or Chat For Best Price! 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#:398512

Part#: D401-0014

Ships in 6 Business Days

Sale - Save 10% $ 95.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 86.30 USD

Add to Wish List

Qty

Sale - Save 10%

$ 95.99

This product was last offered at the strikethrough price on
09-28-2026

$ 86.30 USD

Add to Wish List

Replacement filter that is found on the back of the air pump housing.

Genuine BMW N20 Crankcase Vent Pipe & Hardware Kit (CCV) - m6x16pcvKT...

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#:55281771

Part#: M6X16PCVKT

Ships in 1-2 days

$ 55.82 USD

Add to Wish List

Qty

$ 55.82 USD

Add to Wish List

Keep your Ultimate Driving Machine performing at its peak with this Genuine BMW Crankcase Breather Hose and Hardware Kit.

Genuine BMW Vent Hose - E46 325Ci, E46 325i

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#:32270

Part#: 11157513756

Ships in 1-2 days

Sale - Save 16% $ 177.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 148.91 USD

Add to Wish List

Qty

Sale - Save 16%

$ 177.99

This product was last offered at the strikethrough price on
05-14-2026

$ 148.91 USD

Add to Wish List

Genuine BMW Vent Hose -
This item fits the following BMW Chassis:
E46

Fits BMW Engines including:
M56

Idle Control Valve Kit

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#:15744026

Part#: 11611437453-KT

In Stock

$ 173.13 USD

Add to Wish List

Qty

$ 173.13 USD

Add to Wish List

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

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

Sale - Save 11% $ 208.99

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

$ 186.75 USD

Add to Wish List

Qty

Sale - Save 11%

$ 208.99

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

$ 186.75 USD

Add to Wish List

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

Show More Show Less

Project Cars

SELECT YOUR BMW

Sub-Categories

Comprehensive Constant Pressure Valve Replacement Kit

Bosch Fuel Tank Breather Valve - 13907643106

Performance Oil Separator Kit - M52/S52

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

Oil Separator kit - N63

Turner Oil Separator Kit - E39 M54

Genuine BMW Vacuum Hose - E36 318ti 318is 318ic 318i M44 1.9L ...

Covering Outer - E36

Rear Oxygen Sensor Set - N52, N54

Air Adjustment Unit/DISA Valve Kit

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

Cold Climate Oil Separator Kit - Level 2

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

Oil Separator Kit - Level 1

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

Crankcase Ventilation Refresh Kit

Dinan Replacement Air Pump Filter - E60 M5, E63/E64 M6

Genuine BMW N20 Crankcase Vent Pipe & Hardware Kit (CCV) - m6x16pcvKT...

Genuine BMW Vent Hose - E46 325Ci, E46 325i

Idle Control Valve Kit

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

Select Vehicle

Purpose

Category

Brand

Price

Special Offers

Shipping

Narrow Results