BMW Exhaust Parts Mufflers & Catalytic Converters for BMW X Series E53 (2000-2006)

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Performance exhaust options from the best BMW aftermarket producers and the most reliable replacement maintenance parts are all at Turner Motorsport. Over time, factory exhaust on the cleanest examples of BMW heritage shows their age. Our factory replacement exhausts are just what you need to keep your favorite car in showroom condition or finish off your restoration. If you are looking for a bump in sound and power, you can also find our performance options like Headers, Downpipes, and Mufflers from Corsa, DINAN, and others on this page.

Genuine BMW Exhaust Manifold Hex Nut - 11721437202
Genuine BMW - Corporate Logo
T#:12554
Part#: 11721437202
In Stock
$1.19
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OE BMW exhaust manifold mounting hex nuts. Best to replace when installing new headers or removing the old exhaust headers for any reason. We also recommend replacing the exhaust studs as well do to corrosion often building up on the end, preventing them from being removed or installed easily.

COPPER HEX NUT - 7mm : 119500

O2 Sensor Bung and Plug
Packaged by Turner - Corporate Logo
T#:339000
Part#: TEN9949O2S
In Stock
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Sale - Save 25% $6.00
Starting at $4.50
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Made in the USA O2 Sensor Bung and plug. This weld-in bung allows an O2 sensor to be screwed into your exhaust system. It's required for custom exhaust systems, and is also useful for air/fuel ratio measurements when dyno testing. A threaded plug is included to cap off when not in use. Bung and cap/plug are both 100% stainless steel. The bung and plug are also available separately (in case you don't need both). Simply choose your option below.
    TMS Oxygen Sensor Bung Specs:
  1. Material 304 stainless steel
  2. 1.00" / 25.4mm OD
  3. 0.50" / 12.7mm Tall
  4. Thread size and pitch M18x1.5
    TMS O2 Sensor Plug & Crush Ring Specs
  1. Material 304 stainless steel
  2. 10mm female hex for install and removal
  3. Thread size and pitch M18x1.5
  4. Copper Crush Ring for leak free installation
Install Tips
  • Locate bung as close to engine a possible, without exceeding the maximum operating temperature for the O2 sensor. The suggested location is just down-stream of the merge-collector on each bank of cylinders.
  • Sensors located after upstream exhaust system leaks or too close to exhaust outlets are susceptible to poor readings or influence of ambient air
  • O2 Sensors exposed to exhaust gasses with too high amount of un-burnt fuel can lead to misleading readings. A possible lean reading.
  • Locate sensor/bung 90deg to exhaust gas stream.
  • Locate sensor/bung in tube with a minimum of 10deg up angel to prevent liquid build up in sensor element.
  • Use stainless steel welding wire or rod when installing bung.
  • Do not have bung plug or a oxygen sensor installed when welding bung in place.
  • Welding can distort the bung so it is recommended you chase/tap the threads of the bung after welding.
  • When installing O2 sensor or plug, use an O2 sensor compatible high temperature resistant grease on the threads.
  • Use tightening torque suggested by O2 senor manufacturer.
OEM Bosch Oxygen Sensor - mounts before catalytic converter - E46 E39 E38 X3 X5 Z3 Z4
Bosch - Corporate Logo
T#:2998
Part#: 11781742050
In Stock
$66.95
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This direct fit Bosch 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

Elring Exhaust Gasket - 18107502346 - M54, N52
Elring - Corporate Logo
T#:13196
Part#: 18107502346
In Stock
$9.95
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Exhaust gaskets should be replaced any time the exhaust is taken apart or when a leak occurs. This Elring gasket is perfect to prevent any future leaks and to fix old ones.

Elring is one of the biggest OEM names in the manufacturing of high quality gaskets that are available for very affordable prices. Elring has supplied many automotive names for years with the gaskets that seal your car's components from day 1 so you can rest assured that these components will last for a long time to come!

Fits the following BMW's:
E46, E39, E60, E83, E53, E70, E36 Z3, E85 Z4

Fits the following Engines:
M54, N52


Genuine BMW Hex Bolt M10X40 - 11621427586 - E36,E39,E46,E53,E83,E85
Genuine BMW - Corporate Logo
T#:12478
Part#: 11621427586
In Stock
11% off MSRP $17.28
$15.39
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11% off MSRP $17.28
$15.39
Free Shipping on orders $99 and up

Connects the exhaust manifold to the downpipes.


Genuine BMW Hex Bolt - M10X40
This item fits the following BMW Chassis:
E36,E39,E46,E53 X5,E83 X3,E85

Fits BMW Engines including:
M44,M52,M54,M56,S52

Bosch Oxygen Sensor - mounts after catalytic converter - E46 E39 X3 X5 Z3 Z4
Bosch - Corporate Logo
T#:2118
Part#: 11781433940
In Stock
$73.95
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This is the post-cat oxygen sensor for cylinders 4-6 for BMW E46 E39 X3 X5 Z3 Z4. Bosch # 15 109.

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

Bosch Motorsport LSU 4.9 Wideband Lambda Sensor
Bosch - Corporate Logo
T#:180872
Part#: 0258017032
In Stock
$153.31
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This Bosch Lambda sensor is used with aftermarket engine management systems around the world. It's a universal racing oxygen sensor but only works with specialized racing engine management, advanced air/fuel and Lambda gauges, and Bosch Motorsport ECUs and Lambda control boxes (LT4). This is not a universal sensor to work in any production BMW. This is a motorsport-only wideband O2 sensor.

This sensor is designed to measure the oxygen content and Lambda value of exhaust gases in automotive gasoline engines. The wideband Lambda sensor LSU 4.9 is a planar ZrO2 dual cell limiting current sensor with integrated heater. Its monotonic output signal in the range of I>> = 0.65 to air makes the LSU capable of being used as a universal sensor for I>> = 1 measurement as well as for other Lambda ranges. The connector module contains a trimming resistor, which defines the characteristic of the sensor. The LSU4.9 operates only in combination with a special LSU-IC, used in most Bosch Motorsport ECUs and Lambda control boxes (LT4).

The main benefit of the LSU is the robust design combined with the high Bosch production quality standard.

Application Hints:

  • The Lambda sensor should be installed at a point which permits the measurement of a representative exhaust-gas mixture, which does not exceed the maximum permissible temperature.
  • As far as possible install the sensor vertically (cable upwards).
  • The sensor is not to be fitted near to the exhaust pipe outlet, so that the influence of the outside air can be ruled out.
  • The exhaust piping must be free of leaks in order to avoid the effects of leak-air.
  • Protect the sensor against condensation water.
  • The sensor is not to be coated or painted, nor is wax to be applied or any other forms of treatment.
  • Use only the recommended grease for lubricating the thread.

Application Data:

  • Exhaust Gas Pressure< 4bar
  • Exhaust Gas Temp Range (operating)< 930*C / 1,706*F
  • Exhaust Gas Temp Range (max)< 1,030*C / 1,886*F
  • Hexagon Temp< 600*C / 1,112*F
  • Cable and Protective Sleeve Temp< 250*C / 482*F
  • Connector Temp< 140*C / 284*F
  • Max Vibration (Stochastic Peak Level)< 1,000 m/s2

Mechanical Data:

  • Weight (without cable)120g
  • Length (without cable)84mm
  • Cable Length32.2cm
  • ThreadM18x1.5
  • Wrench Size22mm
  • Tightening Torque40...60Nm

Price is per sensor.

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!

Electric Valve - For Secondary Air System Or Exhaust Flap
Pierburg - Corporate Logo
T#:362205
Part#: 11747810831
In Stock
$39.95
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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)


E53 X5 4.8is Supersprint Performance Mufflers (Left & Right Set) (Round Tips)
Supersprint - Corporate Logo
T#:180891
Part#: 789146-789126
In Stock
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$1,305.52
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Changing the exhaust note can be one of the most pleasing upgrades you can make. The stock mufflers do exactly what BMW intended them to - muffle and dampen the exhaust to meet 'luxury' levels. But if you want to hear more of that great BMW engine changing out the rear mufflers with this Supersprint sport exhaust will come through. Supersprint uses a free-flow design that makes the exhaust louder and sportier while also increasing power and torque. The sound is a muscular but refined rumble especially on the V8 models. There's a throaty burble at low RPM that fades away as the revs build. This gives the X5 a more muscular presence for around town driving but retains stock like sound for highway driving. This system comes with two 90mm round tips on each side.

Supersprint exhaust is widely recognized as the leader in complete exhaust system upgrades - extremely high quality, well designed for optimal flow, and amazing sound. Even at a premium price Supersprint is an unbeatable exhaust system because every aspect is done to such a high level. A Supersprint exhaust rewards you with a terrific sound, long lasting construction and excellent fitment. The Supersprint sound is very 'European' which fits the sporting sophistication of BMWs perfectly. Most systems are also modular - sections can be added or removed to custom tailor the exhaust sound to your preferance. Aside from 'Race' systems, their mufflers meet European noise laws so you get a refined and tuned sound without being excessively loud. Most Supersprint systems are built with larger diameter piping to improve exhaust flow which helps the engine do less work and make more horsepower! Supersprint exhausts generally run at a premium over other systems but no other system on the market can match their quality, performance, or reputation!

section:rear mufflers

connects to:stock resonator or Supersprint resonator

tip style:90mm quad round

material:T304 stainless steel


This item fits the following BMWs:
2004-2006 E53 BMW X5 4.8is


Acousti/Seal Exhaust System Sealing Compound - 5oz Tube
NAPA - Corporate Logo
T#:1389
Part#: 35959
Ships in 2 Business Days
$19.95
Free Shipping on orders $99 and up
With years of experience with dealing with exhaust systems of all kinds, we've found this product to be the BEST at fixing or preventing exhaust leaks. Just apply a light coating of Acousti/seal to pipes, flanges or slip-fit clamps before assembly for a leak free installation. 5 ounce tube (142 grams). UPS Ground shipping to the lower 48 US states only.
Bosch Oxygen Sensor - Mounts After Catalytic - E36 318i M44, E38 750il, E53 X5 4.4i 4.6is
Bosch - Corporate Logo
T#:7079
Part#: 11781739845
Ships in 6 Business Days
$149.95
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This direct fit Bosch oxygen sensor (lambda sensor) plugs directly into your factory connector. Fits M44 engine 318i/is/ic and e38 750il M73N engine, and X5 4.4i 4.6is with M62 engine. No cutting or splicing required. A new oxygen sensor can improve driveability and lengthen engine life. Bosch part number 13755.

This is the post-catalytic converter oxygen sensor

This item fits the following BMWs:
1996-1998 E36 BMW 318i 318is 318ti 318ic
1999-2001 E38 BMW 750il
2000-2003 E53 BMW X5 4.4i X5 4.6is
E39 525i/530i, E53 X5 3.0, E60 525i/530i Supersprint Tubolare Performance Headers
Supersprint - Corporate Logo
T#:388619
Part#: 788201KT
Ships on Feb 13, 2019
Sale - Save 20% $1,372.95
$1,098.36
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Special pricing! Free ground shipping! The biggest restriction in the exhaust is from the stock headers themselves. The factory header/exhaust manifold contains the catalytic converters. The design is not very conducive to exhaust flow so they rob the engine of horsepower and torque. One way to get that back is to use a non-restrictive exhaust header like this Supersprint. It does not contain a catalytic converter so the shape and size of the tubing can be optimized for the M54 3.0-liter inline-6. A catalytic converter is still recommended but installed in place of the factory center resonator.

Supersprint exhaust is widely recognized as the leader in complete exhaust system upgrades - extremely high quality, well designed for optimal flow, and amazing sound. Even at a premium price Supersprint is an unbeatable exhaust system because every aspect is done to such a high level. A Supersprint exhaust rewards you with a terrific sound, long lasting construction and excellent fitment. The Supersprint sound is very 'European' which fits the sporting sophistication of BMWs perfectly. Most systems are also modular - sections can be added or removed to custom tailor the exhaust sound to your preferance. Aside from 'Race' systems, their mufflers meet European noise laws so you get a refined and tuned sound without being excessively loud. Most Supersprint systems are built with larger diameter piping to improve exhaust flow which helps the engine do less work and make more horsepower! Supersprint exhausts generally run at a premium over other systems but no other system on the market can match their quality, performance, or reputation!

NOTE: Supersprint engineers and manufactures complete exhaust systems. This part was designed to be used with the rest of the Supersprint system on this car but may be used on its own. Contact us for more details.

section:header

connects to:OEM center resonator

material:T304 stainless steel

This part alters or deletes the emissions equipment on your car. Because of this, we require a waiver of emissions compliance to be signed and sent in to TMS. You can download the waiver here.


This item fits the following BMWs:
2001-2003 E39 BMW 525i 530i
2004-2005 E60 BMW 525i 530i
2000-2006 E53 BMW X5 3.0i



E53 X5 4.8is Supersprint Section 1 Metallic Sport Cats (fits with Supersprint Headers)
Supersprint - Corporate Logo
T#:184090
Part#: 789102
Ships on Feb 13, 2019
Sale - Save 20% $3,309.14
$2,647.31
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Sale - Save 20% $3,309.14
$2,647.31
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Supersprint exhaust is widely recognized as the leader in complete exhaust system upgrades - extremely high quality, well designed for optimal flow, and amazing sound. Even at a premium price Supersprint is an unbeatable exhaust system because every aspect is done to such a high level. A Supersprint exhaust rewards you with a terrific sound, long lasting construction and excellent fitment. The Supersprint sound is very 'European' which fits the sporting sophistication of BMWs perfectly. Most systems are also modular - sections can be added or removed to custom tailor the exhaust sound to your preferance. Aside from 'Race' systems, their mufflers meet European noise laws so you get a refined and tuned sound without being excessively loud. Most Supersprint systems are built with larger diameter piping to improve exhaust flow which helps the engine do less work and make more horsepower! Supersprint exhausts generally run at a premium over other systems but no other system on the market can match their quality, performance, or reputation!

NOTE: Supersprint engineers and manufactures complete exhaust systems. This part was designed to be used with the rest of the Supersprint system on this car but may be used on its own. Contact us for more details.

This product modifies (but does not remove or defeat) emissions equipment. For this reason this product may not be CARB compliant, and therefore not emissions legal in some states. Consult local laws and regulations in your area. For more information on this product, feel free to contact our sales department.

E53 X5 Supersprint Performance Mufflers (Left & Right Set) (Round Tips)
Supersprint - Corporate Logo
T#:3889
Part#: TMS3889
Ships on Feb 13, 2019
Sale - Save 20% $1,567.90
$1,254.32
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$1,254.32
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Changing the exhaust note can be one of the most pleasing upgrades you can make. The stock mufflers do exactly what BMW intended them to - muffle and dampen the exhaust to meet 'luxury' levels. But if you want to hear more of that great BMW engine changing out the rear mufflers with this Supersprint sport exhaust will come through. Supersprint uses a free-flow design that makes the exhaust louder and sportier while also increasing power and torque. The sound is a muscular but refined rumble especially on the V8 models. There's a throaty burble at low RPM that fades away as the revs build. This gives the X5 a more muscular presence for around town driving but retains stock like sound for highway driving. This system comes with two 90mm round tips on each side.

Supersprint exhaust is widely recognized as the leader in complete exhaust system upgrades - extremely high quality, well designed for optimal flow, and amazing sound. Even at a premium price Supersprint is an unbeatable exhaust system because every aspect is done to such a high level. A Supersprint exhaust rewards you with a terrific sound, long lasting construction and excellent fitment. The Supersprint sound is very 'European' which fits the sporting sophistication of BMWs perfectly. Most systems are also modular - sections can be added or removed to custom tailor the exhaust sound to your preferance. Aside from 'Race' systems, their mufflers meet European noise laws so you get a refined and tuned sound without being excessively loud. Most Supersprint systems are built with larger diameter piping to improve exhaust flow which helps the engine do less work and make more horsepower! Supersprint exhausts generally run at a premium over other systems but no other system on the market can match their quality, performance, or reputation!

section:rear mufflers

connects to:stock cat section or Supersprint header/cat

tip style:90mm quad round

material:T304 stainless steel


This item fits the following BMWs:
2000-2006 E53 BMW X5 3.0i X5 4.4i X5 4.6is

E53 X5 4.8is Supersprint Performance Mufflers (Left & Right Set) (Oval Tips)
Supersprint - Corporate Logo
T#:180890
Part#: 789136-789106
Ships on Feb 13, 2019
Sale - Save 20% $1,863.90
$1,491.12
Sale - Save 20% $1,863.90
$1,491.12

Free ground shipping!

Changing the exhaust note can be one of the most pleasing upgrades you can make. The stock mufflers do exactly what BMW intended them to - muffle and dampen the exhaust to meet 'luxury' levels. But if you want to hear more of that great BMW engine changing out the rear mufflers with this Supersprint sport exhaust will come through. Supersprint uses a free-flow design that makes the exhaust louder and sportier while also increasing power and torque. The sound is a muscular but refined rumble especially on the V8 models. There's a throaty burble at low RPM that fades away as the revs build. This gives the X5 a more muscular presence for around town driving but retains stock like sound for highway driving. This system comes with slightly oval dual 90x85mm tips on each side.

Supersprint exhaust is widely recognized as the leader in complete exhaust system upgrades - extremely high quality, well designed for optimal flow, and amazing sound. Even at a premium price Supersprint is an unbeatable exhaust system because every aspect is done to such a high level. A Supersprint exhaust rewards you with a terrific sound, long lasting construction and excellent fitment. The Supersprint sound is very 'European' which fits the sporting sophistication of BMWs perfectly. Most systems are also modular - sections can be added or removed to custom tailor the exhaust sound to your preferance. Aside from 'Race' systems, their mufflers meet European noise laws so you get a refined and tuned sound without being excessively loud. Most Supersprint systems are built with larger diameter piping to improve exhaust flow which helps the engine do less work and make more horsepower! Supersprint exhausts generally run at a premium over other systems but no other system on the market can match their quality, performance, or reputation!

section:rear mufflers

connects to:stock resonator or Supersprint section 2 resonator

tip style:90x85mm dual oval

material:T304 stainless steel


This item fits the following BMWs:
2004-2006 E53 BMW X5 4.8is


E53 X5 4.8is Supersprint Tubolare Performance Headers
Supersprint - Corporate Logo
T#:388656
Part#: 789101KT
Ships on Feb 13, 2019
Sale - Save 20% $3,451.95
$2,761.56
Sale - Save 20% $3,451.95
$2,761.56