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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Comprehensive Constant Pressure Valve Replacement Kit
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Packaged by Turner - Corporate Logo
T#:557341
Part#: 11111318185TMSKT
In Stock
Sale - Save 5% $ 86.93

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

$ 82.58 USD
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Sale - Save 5%
$ 86.93

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

$ 82.58 USD
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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. 

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Engine Oil Separator Package - Level 2 - E46 325, E39 525i M54 ...
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Packaged by Turner - Corporate Logo
T#:24344785
Part#: M54OILSEPKT
In Stock
Sale - Save 35% $ 177.99

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

$ 115.41 USD
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Sale - Save 35%
$ 177.99

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

$ 115.41 USD
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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.
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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
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$ 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
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$ 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
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$ 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 day
$ 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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Oil Separator Kit - Level 1
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Packaged by Turner - Corporate Logo
T#:15710823
Part#: E46M5411_61KT
In Stock
Sale - Save 40% $ 124.99

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

$ 74.97 USD
Free Shipping on orders $49 and up
Sale - Save 40%
$ 124.99

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

$ 74.97 USD
Free Shipping on orders $49 and up
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
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Cold Climate Oil Separator Kit - Level 2
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Packaged by Turner - Corporate Logo
T#:15744065
Part#: 114317400450-KT
In Stock
Sale - Save 44% $ 231.99

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

$ 128.81 USD
Free Shipping on orders $49 and up
Sale - Save 44%
$ 231.99

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

$ 128.81 USD
Free Shipping on orders $49 and up
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.
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Air Adjustment Unit/DISA Valve Kit
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Packaged by Turner - Corporate Logo
T#:15677538
Part#: 11617533344-KT
In Stock
Sale - Save 40% $ 162.99

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

$ 97.70 USD
Free Shipping on orders $49 and up
Sale - Save 40%
$ 162.99

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

$ 97.70 USD
Free Shipping on orders $49 and up
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
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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
Idle Control Valve Kit
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Packaged by Turner - Corporate Logo
T#:15744026
Part#: 11611437453-KT
In Stock
Sale - Save 15% $ 178.99

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

$ 151.71 USD
Free Shipping on orders $49 and up
Sale - Save 15%
$ 178.99

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

$ 151.71 USD
Free Shipping on orders $49 and up
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 Emissions Service Kit - E46 M3
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Packaged by Turner - Corporate Logo
T#:555305
Part#: 11157840446KT10
Ships on Mar 9, 2027
$ 296.99

This product was last offered at the strikethrough price on
08-26-2026

$ 282.99 USD
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$ 282.99 USD
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The 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, and hardware.

Fits the following BMWs:
2001-09/2004 E46 BMW M3 - Manual Transmission

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Turner Emissions Service Kit - E46 M3
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Packaged by Turner - Corporate Logo
T#:555304
Part#: 11157840446KT9
Ships on Mar 9, 2027
$ 426.99

This product was last offered at the strikethrough price on
08-26-2026

$ 412.99 USD
Free Shipping
$ 412.99 USD
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The 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, and hardware.

Fits the following BMWs:
09/2004-2006 E46 BMW M3 - Manual Transmission

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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
Free Shipping on orders $49 and up