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
Free Shipping on orders $49 and up
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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Oxygen Sensor - Priced Each
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URO - Corporate Logo
T#:35863157
Part#: 11781742050
In Stock
$ 49.99 USD
Free Shipping on orders $49 and up
This direct fit oxygen sensor plugs directly into your factory connector. It is the pre-cat sensor. No cutting or splicing required. A new oxygen sensor can improve driveability and lengthen engine life. It fits BMW E46 E39 E38 X3 X5 Z3 Z4. Bosch # 13 477.

This item fits the following BMWs:
1999-3/2003 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330xi 330ci
1999-2003 E39 BMW 525i 528i 530i M5
1997-2003 E39 BMW 540i
1995-2001 E38 BMW 750il
2004-2006 E83 BMW X3 2.5i X3 3.0i
2000-2006 E53 BMW X5 3.0i
2000-2003 E53 BMW X5 4.4i 4.6is
1999-2002 Z3 BMW Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i
2003-2005 E85 BMW Z4 2.5i Z4 3.0i
2000-2003 E52 BMW Z8
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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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URO PCV Breather Hose Kit - E39, E46, E83
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URO - Corporate Logo
T#:592719
Part#: BMM54PCVKIT
In Stock
$ 117.99 USD
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$ 117.99 USD
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Comes with everything needed to refresh the PCV System!

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

Rein - Corporate Logo
T#:379190
Part#: 11617504535K
Ships in 1 Business Day
$ 79.99 USD
Free Shipping
$ 79.99 USD
Free Shipping

Turner Motorsport presents the Crankcase Ventilation System Refresh Kit for BMW owners experiencing malfunctioning or aged CCV systems. This comprehensive kit includes all necessary hoses to complete a refresh, ensuring optimal performance and reliability for your BMW's CCV system.

  • Addresses malfunctioning CCV systems
  • Ensures proper ventilation of the crankcase
  • Comprehensive kit includes all necessary hoses
  • Restores performance and reliability
  • Compatible with various BMW models
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Fuel Tank Breather Valve
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URO - Corporate Logo
T#:591935
Part#: 13901433603
Ships in 1 Business Day
$ 49.99 USD
Free Shipping on orders $49 and up
Valve between charcoal canister and throttle body

Rein M52 M54 Upper Oil Separator Vent Tube (CCV) - 11617504535 - E46,...
For vehicles with production date from 01/2000
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:378292
Part#: 11617504535
In Stock
$ 22.99 USD
Free Shipping on orders $49 and up
$ 22.99 USD
Free Shipping on orders $49 and up
Runs from the top of the oil separator up to intake manifold.

Leak Detection Pump
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URO - Corporate Logo
T#:15445597
Part#: 16136756440
In Stock
$ 153.99 USD
Free Shipping on orders $49 and up
Leak detection pump tests fuel containment system for vapor leaks to atmosphere. Failed pump often turns on check engine light.
Suction Pump
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URO - Corporate Logo
T#:377591
Part#: 11617545382
In Stock
$ 59.62

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

$ 53.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
$ 59.62

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

$ 53.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
A common source for vacuum leaks
Crankcase Pressure Regulator Valve
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URO - Corporate Logo
T#:373032
Part#: 11617501566
Ships in 1 Business Day
$ 25.99 USD
Free Shipping on orders $49 and up
$ 25.99 USD
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Commonly referred to as the "oil separator" or PCV


Upper Oil Separator Vent Tube
For vehicles with production date from 01/2000
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URO - Corporate Logo
T#:362022
Part#: 11617504535
Ships in 1 Business Day
$ 20.99 USD
Free Shipping on orders $49 and up
$ 20.99 USD
Free Shipping on orders $49 and up
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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Pressure Hose
For vehicles with production date from 03/2003
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URO - Corporate Logo
T#:585279
Part#: 11727555681
Back Ordered
$ 43.99 USD
Free Shipping on orders $49 and up
$ 43.99 USD
Free Shipping on orders $49 and up
Pressure hose for the secondary air pump system. This hose runs from the secondary air pump to the solenoid.
"Cold Climate" Oil Separator Kit
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URO - Corporate Logo
T#:377838
Part#: 11617534237
Ships in 1 Business Day
$ 74.99 USD
Free Shipping
$ 74.99 USD
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URO Parts is one of the leading manufacturers of high quality direct replacement aftermarket components, covering a wide range of makes and models. All of their replacement parts are manufactured to ISO 9000 certification standards, so you can expect long lasting performance from URO Parts.
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Rein Vent Hose - 11157513756 - E46 325i 325Ci
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:594296
Part#: 11157513756
Ships in 3 Business Days
$ 35.75

This product was last offered at the strikethrough price on
08-13-2026

$ 30.99 USD
Free Shipping on orders $49 and up
$ 30.99 USD
Free Shipping on orders $49 and up
Connects the intake manifold to the valve cover

Rein - Corporate Logo
T#:552486
Part#: 11617533399
Ships in 1 day
$ 35.99 USD
Free Shipping on orders $49 and up
Runs from the top of the oil separator up to rear of the intake manifold.
Vacuum Control Valve - E36 E39 E46 E53 E65 E66 E70 E83 E90
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URO - Corporate Logo
T#:24179138
Part#: 11747810831
Ships in 1 Business Day
$ 27.99 USD
Free Shipping on orders $49 and up
Vacuum control valve used in emissions control systems.

Bremmen Crankcase Ventilation Hose - E39 E53 E60 E83 E46
10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!
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

Rein - Corporate Logo
T#:34181269
Part#: 11157831311
Back Ordered
$ 11.99 USD
Free Shipping on orders $49 and up

Crankcase Vent Hose ABV0329 is an essential component designed for BMW engines, ensuring optimal performance of the crankcase ventilation system. This high-quality vent hose plays a critical role in regulating and redirecting excess gases from the crankcase back into the engine's intake, reducing harmful emissions and preventing pressure buildup. Crankcase Vent Hose ABV0329 helps maintain engine efficiency and protects against potential damage caused by over-pressurization or oil leaks.

Made from durable, heat-resistant materials, this hose is built to withstand the high temperatures and pressures common in BMW engines. It is a direct-fit replacement, making installation simple and efficient for both professionals and DIY mechanics. Available from Turner Motorsport, Crankcase Vent Hose ABV0329 is the perfect solution for restoring and maintaining your BMW’s crankcase ventilation system.

Key Benefits:

  • Ensures proper crankcase ventilation for optimal engine performance
  • Reduces harmful emissions by redirecting excess gases into the intake
  • Prevents pressure buildup and protects against oil leaks
  • Constructed from durable, heat-resistant materials for long-lasting reliability
  • Direct-fit replacement, ensuring easy installation for various BMW models
  • Available from Turner Motorsport, a trusted source for BMW performance parts
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OEM BMW Engine Rubber Mounting 11727559515
For vehicles with production date up to 03/2003
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URO - Corporate Logo
T#:13041
Part#: 11727559515
In Stock
$ 4.79 USD
Free Shipping on orders $49 and up
$ 4.79 USD
Free Shipping on orders $49 and up
OEM BMW RUBBER MOUNTING:116095
Crankcase Ventilation Hose
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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
Rein - Corporate Logo
T#:46478579
Part#: ABH0263
In Stock
$ 23.99 USD
Free Shipping on orders $49 and up
$ 23.99 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 this and all the other components of the oil separator system 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.
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URO Parts Non-Return Valve - 11611312737 - E36, E46, E34, E39, E24, E...
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URO - Corporate Logo
T#:56977985
Part#: 11611312737
In Stock
New Item
$ 12.99 USD
Free Shipping on orders $49 and up
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 Ventilation Hose - E46 M3 Z3M Coupe S54
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URO - Corporate Logo
T#:25109076
Part#: 11157831311
Ships on Dec 7, 2026
$ 17.99 USD
Free Shipping on orders $49 and up

This hose runs from the oil separator to the intake manifold and is designed to allow the recirculation of built-up oil vapors.

Due to its proximity to engine heat, this hose tends to get brittle and break as it ages. This can lead to oil leaks, vacuum leaks, misfires, and more.

If your crankcase ventilation hose is brittle or leaking, replace it with this unit from URO Parts.

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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
Free Shipping on orders $49 and up
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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Return Pipe
For vehicles with production date from 01/2000
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URO - Corporate Logo
T#:372847
Part#: 11617504536
Ships in 1 Business Day
$ 16.99 USD
Free Shipping on orders $49 and up
$ 16.99 USD
Free Shipping on orders $49 and up
Runs from the intake manifold back to connecting hose

Rein Return Pipe - 11617504536 - E46, E39, E60, E83, E53
For vehicles with production date from 09/1998 For vehicles with production date from 01/2000
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:375092
Part#: 11617504536
In Stock at Vendor
$ 19.99

This product was last offered at the strikethrough price on
10-22-2026

$ 13.99 USD
Free Shipping on orders $49 and up
$ 13.99 USD
Free Shipping on orders $49 and up
Runs from the intake manifold back to connecting hose
Crankcase Ventilation Dipstick Hose - BMW M52TU M54
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URO - Corporate Logo
T#:359570
Part#: 11157532629
Ships in 1 Business Day
$ 12.99 USD
Free Shipping on orders $49 and up

This tube runs from the oil separator to the lower dipstick tube.

 

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 this and all the other components of the oil separator system 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.

Show More Show Less

Pressure Hose
For vehicles with production date up to 03/2003
2X Entries Into Our F80 M3 Sweepstakes 2X Entries For Our Spin To Win Sweepstakes!
URO - Corporate Logo
T#:372643
Part#: 11727555680
Ships in 1 Business Day
$ 17.99 USD
Free Shipping on orders $49 and up
$ 17.99 USD
Free Shipping on orders $49 and up
Runs from the air pump to the solenoid valve
Rein - Corporate Logo
T#:384805
Part#: 11611440317
Ships in 3 Business Days
$ 20.30 USD
Free Shipping on orders $49 and up

"Cold Climate" Crankcase Pressure Regulator Valve
Superior performance for both warm and cold climates
2X Entries Into Our F80 M3 Sweepstakes 2X Entries For Our Spin To Win Sweepstakes!
URO - Corporate Logo
T#:376770
Part#: 11617533400
Ships in 1 Business Day
$ 40.99 USD
Free Shipping
$ 40.99 USD
Free Shipping
Commonly referred to as the "oil separator" or PCV

Crankcase Vent Hose - From Valve Cover to Oil Separator - E46 E39 E6...
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URO - Corporate Logo
T#:2853
Part#: 11611432559
Ships in 1 Business Day
$ 14.99 USD
Free Shipping on orders $49 and up
$ 14.99 USD
Free Shipping on orders $49 and up
This Crankcase Vent Hose - From Valve Cover to Oil Separator fits BMWs with the M52 or M54 6 cylinder engine including E46 323i 325i 328i 330i E39 525i 528i 530i E60 525i 530i X3 2.5i 3.0i X5 3.0i Z3 2.5 2.8 3.0i Z4 2.5i 3.0i.

This item fits the following BMWs:
1999-2005 E46 BMW 323i 323ci 328i 328ci 330i 330ci 330xi
1999-2005 E46 BMW 325i 325ci 325xi - only with M54 engine
1999-2003 E39 BMW 528i 528i 530i
2004-2005 E60 BMW 525i 525xi 530i 530xi
2004-2006 E83 BMW X3 2.5i X3 3.0i
2000-2006 E53 BMW X5 3.0i
1999-2002 Z3 BMW Z3 2.3 Z3 2.5i Z3 2.8i Z3 3.0i
2003-2006 E85 BMW Z4 2.5i Z4 3.0i
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Rein M52 M54 Cold Climate Crankcase Ventilation Dipstick Hose (CCV) -...
For use in cold climates
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:2879
Part#: 11157532629
In Stock at Vendor
$ 10.99 USD
Free Shipping on orders $49 and up
$ 10.99 USD
Free Shipping on orders $49 and up
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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URO Crankcase Ventilation Hose - BMW M52TU M54
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URO - Corporate Logo
T#:377307
Part#: 11157532649
Ships in 1 Business Day
$ 12.99 USD
Free Shipping on orders $49 and up
$ 12.99 USD
Free Shipping on orders $49 and up
From oil separator to dipstick tube


Rein Pressure Hose - 11727555680 - E46
For vehicles with production date up to 03/2003
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:362278
Part#: 11727555680
In Stock
$ 26.99

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

$ 16.99 USD
Free Shipping on orders $49 and up
$ 16.99 USD
Free Shipping on orders $49 and up
Runs from the air pump to the solenoid valve
Rein - Corporate Logo
T#:359420
Part#: 11157532649
In Stock
$ 11.99 USD
Free Shipping on orders $49 and up
$ 11.99 USD
Free Shipping on orders $49 and up
ENGINE VENT HOSE 11157532649
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
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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
Free Shipping on orders $49 and up
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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