Emissions System for BMW Z Series E85/6 (2003-2008)

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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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Rein Return Pipe - E39, E46, E53, E60, E83, Z3, Z4
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Rein - Corporate Logo
T#:375092
Part#: 11617504536
In Stock
Sale - Save 5% $ 19.99

This product was last offered at the strikethrough price on
06-29-2026

$ 18.99 USD
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Sale - Save 5%
$ 19.99

This product was last offered at the strikethrough price on
06-29-2026

$ 18.99 USD
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Runs from the intake manifold back to connecting hose
Return Pipe
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URO - Corporate Logo
T#:372847
Part#: 11617504536
Ships in 1 Business Day
$ 16.99 USD
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$ 16.99 USD
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Runs from the intake manifold back to connecting hose
Oil Separator Valve
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Rein - Corporate Logo
T#:594299
Part#: 11617531423
Ships in 3 Business Days
Sale - Save 5% $ 120.81

This product was last offered at the strikethrough price on
06-29-2026

$ 114.77 USD
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Sale - Save 5%
$ 120.81

This product was last offered at the strikethrough price on
06-29-2026

$ 114.77 USD
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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.
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"Cold Climate" Crankcase Pressure Regulator Valve
Superior performance for both warm and cold climates
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URO - Corporate Logo
T#:376770
Part#: 11617533400
Ships in 1 Business Day
$ 70.99

This product was last offered at the strikethrough price on
04-10-2026

$ 40.99 USD
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$ 40.99 USD
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Commonly referred to as the "oil separator" or PCV

Hose - From Oil Separator to Oil Dipstick Tube - E46 E39
For use in cold climates
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Rein - Corporate Logo
T#:2879
Part#: 11157532629
In Stock at Vendor
Sale - Save 13% $ 11.99

This product was last offered at the strikethrough price on
03-26-2026

$ 10.44 USD
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Sale - Save 13%
$ 11.99

This product was last offered at the strikethrough price on
03-26-2026

$ 10.44 USD
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This is the updated hose that goes from the Crankcase Oil Separator Valve to the oil dipstick tube. This tube tends to get plugged with oil sludge and becomes brittle and cracks. It fits E46 323i 323ci 325i (M54) 325ci (M54) 325xi 328i 328ci 330i 330ci 330xi - E39 525i 530i - E60 525i 530i 2004-2005 - X3 2.5i 3.0i 2004-2006 - Z3 2.5i 3.0i - Z4 2.5i 3.0i 2003-2006.
In german, Rein means Pure. In the automotive industry the Rein name has quickly come to represent quality. With fitments for some of the world’s finest automobiles including BMW and Mini and guaranteed OE quality, Rein is a name you can trust.

This item fits the following BMWs:
2001-2005 E46 BMW 325i 325ci 325xi Only for cars with M54 engine
1999-2005 E46 BMW 323i 323ci 328i 328ci 330i 330ci 330xi
2001-2003 E39 BMW 525i 530i
2004-2005 E60 BMW 525i 525xi 530i 530xi
2004-2006 E83 BMW X3 2.5i X3 3.0i
2001-2002 Z3 BMW Z3 2.5i Z3 3.0i
2003-2005 Z4 BMW Z4 2.5i Z4 3.0i
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Pierburg Secondary Air Valve
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Pierburg - Corporate Logo
T#:373991
Part#: 11727837456
In Stock at Vendor
$ 268.15

This product was last offered at the strikethrough price on
03-23-2026

$ 174.00 USD
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$ 174.00 USD
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Also known as an EGR valve

OEM Bosch Oxygen Sensor -- BMW N62 S54
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Bosch - Corporate Logo
T#:14665
Part#: 11787540167
In Stock at Vendor
$ 206.82 USD
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$ 206.82 USD
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Bad oxygen sensors can cause check engine lights and poor fuel mileage. Replace your faulty sensor with this high quality Bosch sensor to turn off your check engine light and restore fuel mileage.

This is the pre-cat oxygen sensor for either bank 1 - cylinders 1-3 OR bank 2 - cylinders 4-6 for BMW Z4M Bosch # 15168. There is one sensor per bank. Sold individually. OEM replacement for BMW part # 11787540167.

Bosch is one of the largest OEM producers of Genuine BMW and aftermarket parts in the world, providing parts for almost every major automotive manufacturer. Bosch has likely supplied many of the original electrical (and mechanical) parts for your BMW. Thanks to their quality, high durability, and reliability, you should expect a long service life from Bosch products.

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!


This item fits the following BMWs:
2006-2008 E85 BMW Z4 M Roadster M Coupe

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Crankcase Ventilation Hose
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URO - Corporate Logo
T#:378279
Part#: 11617533398
Ships in 1 Business Day
$ 21.99 USD
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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.
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AutoTecknic Dry Carbon Competition Oil Cap Cover - Type 2 - For Vario...
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AUTOTECKNIC - Corporate Logo
T#:39971048
Part#: BM-0008
Ships in 7 Business Days
$ 64.99 USD
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A precision-crafted dry carbon fiber upgrade that enhances the engine bay of compatible BMW and MINI vehicles with a lightweight, motorsport-inspired design and easy OEM-style installation

Genuine BMW Oxygen Sensor - E83 Z4
Rear
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Genuine BMW - Corporate Logo
T#:13052
Part#: 11787513962
Ships in 6 Business Days
15% off MSRP $ 325.99

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

$ 277.99 USD
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15% off MSRP
$ 325.99

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

$ 277.99 USD
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Genuine BMW Regulating Lambda Probe - L=320mm
This item fits the following BMW Chassis:
E83 X3,E85

Fits BMW Engines including:
M54

Genuine BMW Front Oxygen Sensor - bank 1 Pre-Cat
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Genuine BMW - Corporate Logo
T#:367762
Part#: 11787558055
Ships in 3 Business Days
15% off MSRP $ 406.99

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

$ 346.99 USD
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15% off MSRP
$ 406.99

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

$ 346.99 USD
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Return Pipe - E46, Z3, Z4
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Genuine BMW - Corporate Logo
T#:36176
Part#: 11537838756
Ships in 5 Business Days
1% off MSRP $ 587.99

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

$ 583.99 USD
Free Shipping
1% off MSRP
$ 587.99

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

$ 583.99 USD
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Genuine BMW Return Pipe
This item fits the following BMW Chassis:
E46 M3,E85 Z4M,E46,E85 Z4,E86 Z4

Fits BMW Engines including:
S54



Pierburg Secondary Air Pump - E83, Z4
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Pierburg - Corporate Logo
T#:379001
Part#: 11727571591
Ships in 1-2 days
$ 315.05 USD
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$ 315.05 USD
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Common source of emissons related issues
Pierburg Air Pump Control Valve - E53, E60, Z4
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Pierburg - Corporate Logo
T#:379003
Part#: 11727553067
Ships in 1-2 days
$ 144.02 USD
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$ 144.02 USD
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Located on the cylinder head, allows air to enter into the exhaust
Rein Crankcase Ventilation Hose - E39, E46, E60, E83, Z3, Z4 ...
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Rein - Corporate Logo
T#:359420
Part#: 11157532649
In Stock
Sale - Save 5% $ 11.99

This product was last offered at the strikethrough price on
06-29-2026

$ 11.39 USD
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Sale - Save 5%
$ 11.99

This product was last offered at the strikethrough price on
06-29-2026

$ 11.39 USD
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ENGINE VENT HOSE 11157532649

Secondary Air Pump Bracket - E46, Z4
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Genuine BMW - Corporate Logo
T#:37420
Part#: 11727514955
Ships in 9 Business Days
2% off MSRP $ 50.99

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

$ 49.99 USD
Free Shipping on orders $49 and up
2% off MSRP
$ 50.99

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

$ 49.99 USD
Free Shipping on orders $49 and up


Genuine BMW Secondary Air Pump Bracket -
This item fits the following BMW Chassis:
E46,E85

Fits BMW Engines including:
M54,M56


Febi Rear Oxygen Sensor - Bank 1 Post-Cat
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Febi - Corporate Logo
T#:16375111
Part#: 11787526262
Special Order: No Guaranteed ETA
$ 124.99 USD
Free Shipping on orders $49 and up
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. Febi's Oxygen sensors are high quality and will give you the longest and best performance for the price.
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OEM Febi Crankcase Ventilation Return Hose - E60 E90 Z4 N52 3.0L ...
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Febi - Corporate Logo
T#:38452821
Part#: 11157527570
Special Order: No Guaranteed ETA
$ 93.99 USD
$ 93.99 USD
For your BMW's optimal performance, ensure the functionality of the hose connecting the oil dipstick to the crankcase vent valve. Positioned below the intake manifold, this hose is susceptible to clogging with oil film and condensation, leading to potential failure over time. Cracks and swelling in old hoses can result in oil and vacuum leaks, compromising engine performance.
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Front Oxygen Sensor - Bank 1 Pre-Cat
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Bremmen Parts - Corporate Logo
T#:54780515
Part#: 11787558055
Ships on Oct 19, 2026
New Item
$ 99.99 USD
Free Shipping on orders $49 and up
Meyle Oxygen Sensor - BMW F10/12/13 M S63, Z4 N52 3.0L
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Meyle - Corporate Logo
T#:5973207
Part#: 11787539137
Special Order: No Guaranteed ETA
$ 102.99 USD
Free Shipping on orders $49 and up
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.
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Pierburg Vacuum Pump - BMW N52 3.0L
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Pierburg - Corporate Logo
T#:380841
Part#: 11667519457
Special Order: No Guaranteed ETA
$ 225.99 USD
Free Shipping on orders $49 and up
If your vacuum pump is noisy then it is only a matter of time before it fails, leading to idling issues and a loss of braking power. Replace yours with this OEM Pierburg Vacuum Pump to ensure the smooth operation of the vacuum system.
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Meyle Rear Bank 1 Post-Cat Oxygen Sensor - 560mm - E70 E83 E82/88 E9X...
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Meyle - Corporate Logo
T#:5944215
Part#: 11787545074
Special Order: No Guaranteed ETA
$ 116.99 USD
Free Shipping on orders $49 and up
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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02 SENSOR BUNG (WELD-ON TYPE) 304 STAINLESS STEEL (M18x1.5mm) ...
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Bremmen Parts - Corporate Logo
T#:47439371
Part#: 02SB1815
Ships on Feb 1, 2027
Sale - Save 39% $ 3.99

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

$ 2.44 USD
Free Shipping on orders $49 and up
Sale - Save 39%
$ 3.99

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

$ 2.44 USD
Free Shipping on orders $49 and up

Easily add an oxygen sensor to your custom exhaust setup with this universal O2 sensor bung. Designed for simple weld-on installation, it allows you to place your sensor exactly where you need it—perfect for custom builds, exhaust modifications, or performance tuning projects.

Features:

CNC-cut from T304 Stainless Steel for corrosion resistance
Threaded for M18x1.5mm RH oxygen sensors

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Meyle Oxygen Sensor - Pre-Cat Bank 2 - E9X E60 E82 N52
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Meyle - Corporate Logo
T#:5944212
Part#: 11787558073
Special Order: No Guaranteed ETA
$ 123.99 USD
Free Shipping on orders $49 and up
Bad oxygen sensors can cause check engine lights and poor fuel mileage. Replace your faulty sensor with this high-quality Meyle sensor to turn off your check engine light and restore fuel mileage. This is a Meyle oxygen sensor for BMWs with the N52 engine. This sensor is mounted in the rear downpipe before the catalytic converter. Replacement for BMW # 11787558073 and 11787537984. 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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