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Emissions System

Is your BMW throwing emissions related codes? While we're primarily a BMW performance parts house, we understand the importance of maintaining your emissions system to pass inspection in your area and keep your check engine light off. Pick up your emissions related parts from Turner Motorsport.

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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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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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Rear Oxygen Sensor Set - N52, N54

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.

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

T#:55317713

Part#: BFR1/2O2SKT2

In Stock

$ 400.99

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

$ 337.99 USD

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$ 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 Sensor Set - Pre and Post Catalytic Converter - N55 ...

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.

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

T#:56110313

Part#: 11787558055KT

In Stock

$ 307.99 USD

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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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Rein Pressure Regulator Valve Repair Kit - E53, E60, E63, E64, E65, E...

T#:55821694

Part#: 11127547058

Ships in 4 Business Days

$ 16.99 USD

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$ 16.99 USD

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This Rein Automotive repair kit allows you to service the internal components of the crankcase breather valve independently. Instead of replacing the entire, costly valve cover or manifold assembly, this kit provides the exact wear items required to rebuild the factory housing back to original operating specifications. All components are manufactured to strict OE tolerances. The diaphragm is molded from premium, oil-resistant elastomers engineered to withstand prolonged exposure to aggressive synthetic lubricants, fuel vapors, and extreme under-hood heat cycles without losing its elasticity or sealing profile.

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Crankcase Vent Pipe & Hardware Kit

T#:55281771

Part#: M6X16PCVKT

Ships in 1-2 days

$ 48.58 USD

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$ 48.58 USD

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

CCV Hose

T#:51391238

Part#: 11127850244

Ships on Sep 28, 2026

Sale - Save 20% $ 99.99

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

$ 79.99 USD

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Qty

Sale - Save 20%

$ 99.99

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

$ 79.99 USD

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Oil Separator Vent Hose

T#:53326231

Part#: 11617522933

In Stock

Sale - Save 20% $ 22.99

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

$ 18.39 USD

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Sale - Save 20%

$ 22.99

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

$ 18.39 USD

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Vacuum Pipe

T#:52586629

Part#: 11157603816

Special Order: No Guaranteed ETA

Sale - Save 20% $ 29.99

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

$ 23.99 USD

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Sale - Save 20%

$ 29.99

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

$ 23.99 USD

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Oxygen Sensor Kit - F30/31 N47, E70 M57

T#:55569520

Part#: 13628589844KT2

Ships on Oct 15, 2026

Sale - Save 10% $ 770.99

This product was last offered at the strikethrough price on
07-03-2026

$ 693.88 USD

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Sale - Save 10%

$ 770.99

This product was last offered at the strikethrough price on
07-03-2026

$ 693.88 USD

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Oxygen sensors are used by the vehicle computer to adjust the air/fuel ratio and test vehicle emissions. This kit includes both rear Sensors.

Front Oxygen Sensor - Bank 2 Pre-Cat

T#:55497441

Part#: 11787558087

Ships on Nov 6, 2026

$ 109.99 USD

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$ 109.99 USD

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E70 Return Pipe

T#:52551447

Part#: 11537806706

Ships on Sep 28, 2026

Sale - Save 20% $ 129.99

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

$ 103.99 USD

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Sale - Save 20%

$ 129.99

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

$ 103.99 USD

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Oxygen Sensor

T#:56001972

Part#: 11787596924

Ships on Nov 19, 2026

$ 125.99 USD

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$ 125.99 USD

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Front Oxygen Sensor - Bank 1 Pre-Cat

T#:54780515

Part#: 11787558055

Ships on Oct 19, 2026

$ 99.99 USD

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$ 99.99 USD

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Oxygen Sensor - Priced Each

T#:56291060

Part#: 11787548961

Special Order: No Guaranteed ETA

$ 65.99 USD

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$ 65.99 USD

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Crank Case Ventilation Valve - Priced Each

T#:53326230

Part#: 11158647299

Ships on Aug 11, 2026

Sale - Save 20% $ 80.99

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

$ 64.79 USD

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Qty

Sale - Save 20%

$ 80.99

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

$ 64.79 USD

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