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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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URO Fuel Tank Vent Valve - 13907643106

T#:50031887

Part#: 13907643106

In Stock

$ 44.99 USD

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$ 44.99 USD

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Replaces broken or failing vent valve.

Oil Separator kit - N63

T#:56291074

Part#: 11158636540KT2

Ships in 4 Business Days

$ 429.67 USD

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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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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.

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.

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 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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Oxygen Sensor - Upstream Catalytic Converter

T#:50066854

Part#: 11787596908

Ships in 2 Business Days

$ 99.99 USD

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$ 99.99 USD

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Secondary Air Injection Pump

T#:50031894

Part#: 11721433958

Ships in 2 Business Days

$ 302.99 USD

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$ 302.99 USD

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If you’re dealing with emissions-related faults, the Secondary Air Injection (SAI) pump is an important component to check. This system is designed to inject fresh air into the exhaust manifold during cold starts, helping reduce harmful emissions while the catalytic converters warm up. When the SAI pump is damaged or not operating correctly, emissions can increase and fault codes may be triggered. In states that require emissions testing, a failed air pump can easily result in a failed inspection. Replacing a faulty Secondary Air Injection Pump helps restore proper emissions control, clear related fault codes, and ensure your vehicle remains compliant with emissions requirements.

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URO Crankcase Vent Valve Repair Kit - B58

T#:55713528

Part#: 11121025447

Ships in 2 Business Days

$ 222.99

This product was last offered at the strikethrough price on
07-08-2026

$ 219.99 USD

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$ 219.99 USD

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The URO Parts Crankcase Vent Valve Repair Kit is the smart technician's fix for the notorious BMW crankcase ventilation failures.

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.

Oxygen Sensor

T#:56254844

Part#: 11787512973

Special Order: No Guaranteed ETA

$ 62.99 USD

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$ 62.99 USD

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Maintain peak engine performance and precise air/fuel ratio telemetry with the Febi Bilstein Heated Oxygen Sensor.

Exhaust Gas Cooler

T#:56471635

Part#: 11718517724

Special Order: No Guaranteed ETA

$ 496.99 USD

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$ 496.99 USD

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Keep your BMW’s engine running clean and operating within strict thermal tolerances with this replacement EGR cooler from Febi Bilstein.

Oxygen Sensor

T#:56254780

Part#: 11787836451

Special Order: No Guaranteed ETA

$ 63.99 USD

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$ 63.99 USD

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This Febi Bilstein oxygen sensor is designed as a direct OEM-spec replacement to keep your engine management system operating with pin-point accuracy.

Oxygen Sensor

T#:56254778

Part#: 11781743994

Special Order: No Guaranteed ETA

$ 62.99 USD

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$ 62.99 USD

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This Febi Bilstein Oxygen Sensor provides a high-quality OEM replacement option built to precise vehicle specifications.

MEYLE NOx Sensor - Urea Injection - BMW FXX, EXX

T#:52621848

Part#: MEX1581

Special Order: No Guaranteed ETA

$ 291.99 USD

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$ 291.99 USD

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

NOx Sensor - SCR-Type Catalytic Converter

T#:56616356

Part#: 13627812528

Special Order: No Guaranteed ETA

$ 268.99 USD

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$ 268.99 USD

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Keep your BMW’s emissions control working with the precise calibration it demands with this Febi Bilstein NOx Sensor.

Exhaust Pressure Sensor

T#:55030832

Part#: 3148010004

Special Order: No Guaranteed ETA

$ 57.99 USD

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$ 57.99 USD

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Keep your Ultimate Driving Machine performing at its peak with this replacement BMW exhaust pressure sensor from Meyle.

Fuel Tank Vent Valve

T#:56543996

Part#: 13907621174

Special Order: No Guaranteed ETA

$ 43.99 USD

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$ 43.99 USD

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Keep your BMW or MINI running at peak efficiency with this Febi Bilstein Fuel Tank Vent Valve.

Non-Return Valve

T#:56977985

Part#: 11611312737

Back Ordered

$ 12.99 USD

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$ 12.99 USD

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Keep your BMW's vacuum and secondary air injection systems operating with complete efficiency under all driving conditions using this URO Parts non-return valve

Crankcase Vent Hose / PCV Hose

T#:56977971

Part#: 11127588417

Back Ordered

$ 42.99 USD

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$ 42.99 USD

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This URO Parts crankcase ventilation line offers a durable, budget-friendly replacement for failing factory tubing.

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Emissions System

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