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

Comprehensive Constant Pressure Valve Replacement Kit

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

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

Add to Wish List

Qty

Sale - Save 5%

$ 86.93

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

$ 82.58 USD

Add to Wish List

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.

Show More Show Less

Engine Oil Separator Package - Level 2 - E46 325, E39 525i M54 ...

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

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

Add to Wish List

Qty

Sale - Save 35%

$ 177.99

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

$ 115.41 USD

Add to Wish List

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.

Show More Show Less

Oil Separator Kit - Level 1

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

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

Add to Wish List

Qty

Sale - Save 40%

$ 124.99

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

$ 74.97 USD

Add to Wish List

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

Show More Show Less

Air Adjustment Unit/DISA Valve Kit

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

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

Add to Wish List

Qty

Sale - Save 40%

$ 162.99

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

$ 97.70 USD

Add to Wish List

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

Show More Show Less

Cold Climate Oil Separator Kit - Level 2

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

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

Add to Wish List

Qty

Sale - Save 44%

$ 231.99

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

$ 128.81 USD

Add to Wish List

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.

Show More Show Less

Idle Control Valve Kit

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

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

Add to Wish List

Qty

Sale - Save 15%

$ 178.99

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

$ 151.71 USD

Add to Wish List

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

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:555305

Part#: 11157840446KT10

Ships on Mar 10, 2027

$ 296.99

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

$ 282.99 USD

Add to Wish List

Qty

$ 282.99 USD

Add to Wish List

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

Show More Show Less

Turner Emissions Service Kit - E46 M3

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:555304

Part#: 11157840446KT9

Ships on Mar 10, 2027

$ 426.99

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

$ 412.99 USD

Add to Wish List

Qty

$ 412.99 USD

Add to Wish List

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

Show More Show Less

Meyle Oxygen Sensor - Post-Cat - E46 E39 X3 X5 Z3 Z4

For vehicles with production date up to 03/2003

5X Entries Into Our F80 M3 Sweepstakes 2X Entries For Our Spin To Win Sweepstakes!
We Price Match - Give Us A Call or Chat!

T#:5944219

Part#: 11781433940

Ships on Dec 7, 2026

$ 78.99 USD

Add to Wish List

Qty

$ 78.99 USD

Add to Wish List

This is the post-cat oxygen sensor for cylinders 4-6 for BMW E46 E39 X3 X5 Z3 Z4. This item fits the following BMWs: 1999-3/2003 E46 BMW 323i 323ci 325xi 328i 328ci 330i 330ci 330xi 2001-3/2003 E46 BMW 325i 325ci only for cars with M54 engine 1999-2003 E39 BMW 528i 525i 530i 2004-2006 E83 BMW X3 2.5 - Bank 1 Only 2004-2006 E83 BMW X3 3.0i - Bank 1 - Automatic Transmission Only 2000-2006 E53 BMW X5 3.0i 1999-2002 Z3 BMW Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i 2003-2006 E85 BMW Z4 2.5i Z4 3.0i

Show More Show Less

Meyle Oxygen Sensor - Pre-Cat - E36 Z3 M44, E31, E38, E39 M62 (97-98)...

For vehicles with production date up to 03/2003

5X Entries Into Our F80 M3 Sweepstakes 2X Entries For Our Spin To Win Sweepstakes!
We Price Match - Give Us A Call or Chat!

T#:5944214

Part#: 11781247406

Back Ordered

$ 57.99 USD

Add to Wish List

Qty

$ 57.99 USD

Add to Wish List

This direct-fit Meyle oxygen sensor plugs directly into your factory connector. Fits M44 engine Z3 and 3 series and M62 engine E39, E38, E31 with V8 engines. No cutting or splicing is required. A new oxygen sensor can improve driveability and lengthen engine life. This is the pre-catalytic converter oxygen sensor

Show More Show Less

"Cold Climate" Crankcase Pressure Regulator Valve

5X Entries Into Our F80 M3 Sweepstakes 2X Entries For Our Spin To Win Sweepstakes!
We Price Match - Give Us A Call or Chat!

T#:35829339

Part#: 11617533400

Back Ordered

$ 69.99 USD

Add to Wish List

Qty

$ 69.99 USD

Add to Wish List

BMW vehicles are prone to oil separators freezing in cold weather if driven before the engine is fully warmed up. This can lead to a howling noise followed by multiple oil leaks. The crankcase breather valve vents oil vapor from the engine block to the valve cover, but condensation can sometimes cause it to freeze, leading to a failure of the entire oil separator system, causing it to crack and break down. To prevent damage to your engine, it’s best to replace all components of the oil separator system at once. Replacing everything ensures reliable performance and durability. Remember to also order a valve cover gasket to make the replacement process easier.

Show More Show Less

Project Cars

SELECT YOUR BMW

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

Sub-Categories

Comprehensive Constant Pressure Valve Replacement Kit

Engine Oil Separator Package - Level 2 - E46 325, E39 525i M54 ...

Oil Separator Kit - Level 1

Air Adjustment Unit/DISA Valve Kit

Cold Climate Oil Separator Kit - Level 2

Idle Control Valve Kit

Turner Emissions Service Kit - E46 M3

Turner Emissions Service Kit - E46 M3

Meyle Oxygen Sensor - Post-Cat - E46 E39 X3 X5 Z3 Z4

Meyle Oxygen Sensor - Pre-Cat - E36 Z3 M44, E31, E38, E39 M62 (97-98)...

"Cold Climate" Crankcase Pressure Regulator Valve

Select Vehicle

Category

Brand

Price

Special Offers

Shipping

Narrow Results