Emissions System for BMW 3 Series E46 (1999-2005)

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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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Bremmen "Cold Climate" Crankcase Pressure Regulator Valve Kit - BMW M...
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Bremmen Parts - Corporate Logo
T#:2528129
Part#: 11617533400S1
In Stock
Sale - Save 30% $ 112.99

This product was last offered at the strikethrough price on
11-07-2026

$ 79.09 USD
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Sale - Save 30%
$ 112.99

This product was last offered at the strikethrough price on
11-07-2026

$ 79.09 USD
Free Shipping on orders $49 and up
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. 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. Don't forget to order a valve cover gasket, throttle body gasket, and a new intake boot to make your separator change easier and more comprehensive.
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Bremmen Oil Separator Kit - Level 1 - E39 E46 E83 Z3 Z4
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Bremmen Parts - Corporate Logo
T#:641646
Part#: 11617501566S1
In Stock
Sale - Save 30% $ 97.99

This product was last offered at the strikethrough price on
11-07-2026

$ 68.59 USD
Free Shipping
Sale - Save 30%
$ 97.99

This product was last offered at the strikethrough price on
11-07-2026

$ 68.59 USD
Free Shipping
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. Replace all the components of the oil separator system together to prevent damage to all the aspects of your engine. 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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Leak Detection Pump - Priced Each
For vehicles with production date from 09/2001
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Bremmen Parts - Corporate Logo
T#:35121140
Part#: 16137193479
In Stock
Sale - Save 25% $ 66.99

This product was last offered at the strikethrough price on
11-07-2026

$ 50.24 USD
Free Shipping on orders $49 and up
Sale - Save 25%
$ 66.99

This product was last offered at the strikethrough price on
11-07-2026

$ 50.24 USD
Free Shipping on orders $49 and up

Crankcase Vent Hose
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Bremmen Parts - Corporate Logo
T#:30629661
Part#: 11157831311
In Stock
Sale - Save 30% $ 31.99

This product was last offered at the strikethrough price on
11-07-2026

$ 22.39 USD
Free Shipping on orders $49 and up
Sale - Save 30%
$ 31.99

This product was last offered at the strikethrough price on
11-07-2026

$ 22.39 USD
Free Shipping on orders $49 and up

Pierburg - Corporate Logo
T#:362205
Part#: 11747810831
In Stock
$ 74.99

This product was last offered at the strikethrough price on
07-09-2026

$ 42.19 USD
Free Shipping on orders $49 and up
$ 42.19 USD
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This electric valve serves one of several purposes depending on which car it is used on. Please read the application listings below to ensure you are purchasing the correct part. 

Pierburg pumps are some of the most trusted and widely used on the market. From fuel, water, air and vacuum Pierburg has you covered with OE quality and reliable performance year after year.


This item fits the following BMWs:
Secondary Air System Valve
1996-1998 E36 BMW 323is 323ic 328i 328is 328ic M3
1999-3/2003 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi
2003-2005 E46 BMW 325i 325ci (M56)
1997-2003 E39 BMW 525i 528i 530i 
2000-2006 E53 BMW X5 3.0i 
1997-2002 Z3 BMW Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i 
1997-2000 Z3 BMW M Roadster M Coupe (S52)

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Pierburg - Corporate Logo
T#:362211
Part#: 11727571589
In Stock
$ 358.99 USD
Free Shipping
$ 358.99 USD
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This secondary air pump helps to reduce emissions by mixing fresh air with the exhaust. When this part fails cause a engine fault code and it will trigger a "service engine soon" light. 

This item fits the following BMWs:
3/2003-2005 E46 BMW 325i 325ci 325xi 330i 330ci 330xi 
2004-2005 E60 BMW 525i 530i
2004-2010 E60 BMW 545i M5
2004-2011 E63 BMW 645ci M6
10/2003-2006 E53 BMW X5 3.0i
2004-2005 E83 BMW X3 3.0i

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Pierburg Air Pump Control Valve (EGR) - E46, E83
For vehicles with production date from 03/2003
Pierburg - Corporate Logo
T#:19278
Part#: 11727553066
Special Order: No Guaranteed ETA
$ 105.99 USD
Free Shipping
$ 105.99 USD
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OEM BMW ENGINE VALVE
Pierburg Secondary Air Pump - E46
For vehicles with production date up to 03/2003
Pierburg - Corporate Logo
T#:362210
Part#: 11727553056
Ships in 1-2 days
$ 328.99 USD
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$ 328.99 USD
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This secondary air pump fits BMW E46 323i 323ci 325i (m54) 325ci (m54) 325xi 328i 328ci 330i 330ci thru 2003, 330xi thru 2005. This part helps to reduce emissions by mixing fresh air with the exhaust. When this part fails cause a engine fault code and it will trigger a "service engine soon" light.

This item fits the following BMWs:
1999-2000  E46 BMW  323i 323ci 328i 328ci
2001-3/2003  E46 BMW  325i 325ci - only with M54 engine
2001-2005  E46 BMW  325ci Convertible 325xi
2001-3/2003  E46 BMW  330i 330ci
2001-2005  E46 BMW  330xi
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Bremmen Crankcase Ventilation Hose - E39 E53 E60 E83 E46
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Bremmen Parts - Corporate Logo
T#:640147
Part#: 11611432559
In Stock
Sale - Save 30% $ 23.99

This product was last offered at the strikethrough price on
11-07-2026

$ 16.79 USD
Free Shipping on orders $49 and up
Sale - Save 30%
$ 23.99

This product was last offered at the strikethrough price on
11-07-2026

$ 16.79 USD
Free Shipping on orders $49 and up
Crankcase Vent Hose - From Valve Cover to Oil Separator - Fit BMWs with the M52 or M54 6 cylinder engine

Vacuum Control Valve
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Bremmen Parts - Corporate Logo
T#:47850818
Part#: 11747810831
In Stock
Sale - Save 30% $ 27.99

This product was last offered at the strikethrough price on
11-07-2026

$ 19.59 USD
Free Shipping on orders $49 and up
Sale - Save 30%
$ 27.99

This product was last offered at the strikethrough price on
11-07-2026

$ 19.59 USD
Free Shipping on orders $49 and up
Crankcase Ventilation Hose
10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!
Bremmen Parts - Corporate Logo
T#:30629689
Part#: 11157532649
In Stock
Sale - Save 30% $ 15.99

This product was last offered at the strikethrough price on
11-07-2026

$ 11.19 USD
Free Shipping on orders $49 and up
Sale - Save 30%
$ 15.99

This product was last offered at the strikethrough price on
11-07-2026

$ 11.19 USD
Free Shipping on orders $49 and up
Pierburg - Corporate Logo
T#:373991
Part#: 11727837456
Ships in 1 Business Day
$ 234.10

This product was last offered at the strikethrough price on
09-15-2026

$ 108.85 USD
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$ 108.85 USD
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Also known as an EGR valve


Oxygen Sensor - Front Or Rear Manifold
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Bremmen Parts - Corporate Logo
T#:56797107
Part#: 11787523434
Ships on Dec 15, 2026
New Item
Sale - Save 30% $ 119.99

This product was last offered at the strikethrough price on
11-07-2026

$ 83.99 USD
Free Shipping on orders $49 and up
Sale - Save 30%
$ 119.99

This product was last offered at the strikethrough price on
11-07-2026

$ 83.99 USD
Free Shipping on orders $49 and up
Pierburg - Corporate Logo
T#:22064620
Part#: 11781247406
Special Order: No Guaranteed ETA
$ 55.99 USD
Free Shipping on orders $49 and up
$ 55.99 USD
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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 Jun 10, 2027
Sale - Save 46% $ 3.99

This product was last offered at the strikethrough price on
11-07-2026

$ 2.14 USD
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Sale - Save 46%
$ 3.99

This product was last offered at the strikethrough price on
11-07-2026

$ 2.14 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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