BMW External Engine Parts for BMW 3 Series E46 (1999-2005)

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Looking for parts under the hood of your BMW? This section is for parts and accessories mounted to, and around, the engine. 'External' engine components covers parts and systems up to and after the cylinder head. Examples include crankcase vent valves, secondary air systems, idle control valves, oil filler caps, valve cover trim, and more. For parts within the engine and cylinder head see our 'Internal Engine Components' section.

M50 Throttle Body to M54 E46 325 Intake Manifold - Adapter Plate
M50 Throttle Body to M54 E46 325 Intake Manifold - Adapter Plate ...
TMS SPEED World Challenge racing team incorporates the M5...
Turner Motorsport - Corporate Logo
T#:421
Part#: TEN9990850
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$66.95
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Made in the USA TMS SPEED World Challenge racing team incorporates the M50 throttle body to the E46 325 intake. The reasoning for this is simple. It allows us to use a mechanically operated M50 throttle body instead of the M54 drive by wire throttle body used on E46 motors. The advantage of this is that we can easily use aftermarket management systems (i.e. Motec). The plate mounts flush with 4 flat head M6 allen bolts, and 4 M6 hex head bolts directly between the intake and throttle body and is SCCA legal.
Turner Motorsport M50 Manifold Fuel Rail Cover
Turner Motorsport M50 Manifold Fuel Rail Cover
Turner Motorsport has spent the last two decades striving...
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T#:303995
Part#: TEN3680FRC
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$122.95
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Turner Motorsport has spent the last two decades striving for ultimate performance on the racetrack, and transferring the knowledge gained from winning races onto the street. Their line of BMW performance parts combines, high quality, great value, and most importantly, superior performance that will allow you to dial in your ride to suit your driving style and allow your BMW to live up to its full potential. This modified fuel rail cover will fit the M50 manifold, providing a completed look to your engine bay.
Turner Plug-and-Play IAT Relocation Kit
Turner Plug-and-Play IAT Relocation Kit
All vehicles will lose some degree of performance due to ...
Turner Motorsport - Corporate Logo
T#:391751
Part#: 014579TMS
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Starting at $115.95
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Starting at $115.95
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All vehicles will lose some degree of performance due to heat soak under the right operating conditions. Engine management systems constantly monitor operating conditions and modifying parameters based on sensor inputs. BMW integrated the intake air temp sensor in the MAF housing on models such as the E39 M5, and, being sandwiched behind a hot radiator and in some applications next to an even hotter valve cover, this is less than ideal for performance applications. Absorbing excess heat from its surroundings, the MAF canaEURtmt shed it fast enough, and the ECU reads an inaccurately high intake air temperature. Compensating for this false hot air measurement, the ECU pulls timing and runs a richer fuel mixture, resulting in a significant loss of torque.

What can you do? Locate an intake air temp sensor in a location where it can properly measure incoming air temps and where it's less prone to heat soak. Mounting the sensor further away from the heat source and isolating it from the MAF housing, it can both resist the effects of heat soak longer and respond to temperature changes more quickly. The result is youaEURtmll experience reduced torque loss and more consistent power output when youaEURtmre pushing your engine hard.

The Turner engineering team was initially skeptical of the claimed performance benefits of this modification. They first set out validate the functionality and performance benefit of a temp sensor relocation. Replicating stop-and-go traffic heat soak in a 2001 540i was a simple task in a controlled environment - their dynometer. First the car was heat soaked to simulate being stuck in traffic or moving at low speeds by running the car four times on the dyno with the dyno's cooling fans disabled. The fans were then turned on for three more runs to observe the recovery rate once air flow was reintroduced. The test: following this procedure once with a stock IAT, and once with their relocation kit in place.

The result? Turner recovered 11lb-ft torque at 2500rpm through use of their relocation kit, with even greater recovery to be found for M5 owners. Here are the heat soak-related torque losses Turner experienced:

Stock IAT location:
18rwtq at 2500rpm
10rwtq at 3000rpm
9rwtq at 3700rpm

Turner IAT Relocation:
7rwtq at 2500rpm
5rwtq at 3000rpm
5rwtq at 3700rpm

**Click here for installation instructions**

The Turner engineering team designed a complete plug and play kit (unlike all other options on the market) that makes for quick, easy, and reversible installation. Weather-sealed connectors keep out the elements, while sheathed wiring offers a clean appearance underhood. With a harness nearly 3 feet long - the Turner IAT relocation kit offers flexibility in positioning, but not too long that you're left with unsightly excess wiring. Turner recommends positioning the sensor in a location away from engine heat, but still within the intake ducting to achieve accurate intake temp readings - such as the far side of the base of the airbox. Vehicles with cold air intakes with cone-style filters can even position the sensor in the end of the filter. Simply drill a hole in your (cool) location of choice and plug in the harness. More information including installation instructions and some good examples of sensor mounting locations can be found in our DIY PDF.

We include everything you need to relocate your IAT, just select your desired sensor brand below - Genuine BMW or original equipment Beru.

Also the perfect plug-n-play option for anyone looking to upgrade their intake to utilize an Alpha-N tune!

Note for vehicles with M62 engine: applicable to 1999 and up


Coolest $10 Part Ever (fan stud nut for engine fan delete)
Coolest $10 Part Ever (fan stud nut for engine fan delete) ...
This BMW Motorsport part was designed for BMW touring car...
Genuine BMW - Corporate Logo
T#:3459
Part#: 11511310640
In Stock
18% off MSRP $12.40
$10.19
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18% off MSRP $12.40
$10.19
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This BMW Motorsport part was designed for BMW touring car racing. This reverse thread nut covers the ugly exposed stud when you remove your engine fan and fan clutch. This simple part cleans up the look of an engine with the fan removed. Fits most BMW models. COOL!

Valve Cover / Injection Rail Trim Cap - E36 E46 E34 E39 E60 X3 X5 Z4
Valve Cover / Injection Rail Trim Cap - E36 E46 E34 E39 E60 X3 X5 Z4...
This plug cover serves several different purposes. It cov...
Genuine BMW - Corporate Logo
T#:3386
Part#: 11121726089
In Stock
$2.99
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This plug cover serves several different purposes. It covers the bolts in the valve cover on some cars and it also covers the bolts on the fuel injector rail cover on other cars.
When doing any sort of repair or maintenance there is no replacement for genuine factory parts. Turner Motorsport carries the Genuine BMW brand with pride and has the parts you need to complete your next project with confidence.

This item fits the following BMWs:
1992-1998 E36 BMW 323is 323ic 325i 325is 325ic 328i 328is 328ic
1995-1999 E36 BMW M3 - Only for Fuel Injection Rail Cap
1999-2005 E46 BMW 323i 323ci 325i (M54) 325ci (M54) 325xi 328i 328ci 330i 330ci 330xi
1991-1995 E34 BMW 525i
1997-2003 E39 BMW 525i 528i 530i
2004-2005 E60 BMW 525i 530i
2004-2006 E83 BMW X3 2.5i X3 3.0i
2000-2006 E53 BMW X5 3.0i
1997-2002 Z3 BMW Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i
1998-2000 Z3 BMW M Roadster M Roadster (S52) - Only for Fuel Injection Rail Cap
2003-2008 Z4 BMW Z4 2.5i Z4 3.0i
Oil Filler Cap with M logo - E36 M3 96-99 E46 M3 MZ3
Oil Filler Cap with M logo - E36 M3 96-99 E46 M3 MZ3
This oil filler cap features the M logo and fits BMW E36 ...
Genuine BMW - Corporate Logo
T#:2073
Part#: 11121405452
In Stock
11% off MSRP $17.62
$15.69
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11% off MSRP $17.62
$15.69
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This oil filler cap features the M logo and fits BMW E36 M3, E46 M3, and MZ3 with S52 and S54 engines.
When doing any sort of repair or maintenance there is no replacement for genuine factory parts. Turner Motorsport carries the Genuine BMW brand with pride and has the parts you need to complete your next project with confidence.

This item fits the following BMWs:
1996-1999 E36 BMW M3
2001-2006 E46 BMW M3
1998-2002 Z3 BMW M Coupe M Roadster

Valve Cover Nut - E36 E46 E39 E60 and more
Valve Cover Nut - E36 E46 E39 E60 and more
Ever lose one of these or round one off while working on ...
Genuine BMW - Corporate Logo
T#:4407
Part#: 11121738607
In Stock
$7.78
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Ever lose one of these or round one off while working on your car? This valve cover nut includes the washer and rubber seal. Sold Individually.
When doing any sort of repair or maintenance there is no replacement for genuine factory parts. Turner Motorsport carries the Genuine BMW brand with pride and has the parts you need to complete your next project with confidence.

This item fits the following BMWs:
1992-1998 E36 BMW 323is 323ic 325i 325is 325ic 328i 328is 328ic M3
1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi
1991-1995 E34 BMW 525i
1997-2003 E39 BMW 525i 528i 530i
2004-2005 E60 BMW 525i 530i
2004-2006 E83 BMW X3 2.5i X3 3.0i
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 Roadster
2003-2006 Z4 BMW Z4 2.5i Z4 3.0i
Secondary Air Pump To Valve Hose - E46
Secondary Air Pump To Valve Hose - E46
The secondary air system helps to reduce emissions by pum...
Genuine BMW - Corporate Logo
T#:7062
Part#: 11727555680
In Stock
13% off MSRP $30.17
$26.38
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13% off MSRP $30.17
$26.38
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The secondary air system helps to reduce emissions by pumping fresh air into the exhaust system ahead of the catalytic converter. As the air is heated it helps to combust the un-burned fuel coming from the engine as well as bring the catalytic converters up to operating temperature sooner. This hose connects the secondary air pump to the seconadary air pump with the secondary air valve.

This item fits the following BMWs:
1999-2003 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi

Torx Bolt for Vibration Damper - E46 M3, MZ3, Z4 M Roadster M Coupe
Torx Bolt for Vibration Damper - E46 M3, MZ3, Z4 M Roadster M Coupe ...
These torx bolts secure the vibration damper to the crank...
Genuine BMW - Corporate Logo
T#:5442
Part#: 11231402608
In Stock
$10.00
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These torx bolts secure the vibration damper to the crankshaft. 4 Required. Sold individually.

This item fits the following BMWs:
2000-2006 E46 BMW M3, M3 Convertible
2001-2002 Z3 BMW M Roadster M Coupe
2006-2008 Z4 BMW M Roadster M Coupe

Genuine BMW Cylinder Head Cover - 11127512839 - E39,E46,E53,E60,E83,E85
Genuine BMW Cylinder Head Cover - 11127512839 - E39,E46,E53,E60,E83,...
For vehicles with production date from 09/2002Genuine BMW...
Genuine BMW - Corporate Logo
T#:12493
Part#: 11127512839
In Stock
18% off MSRP $485.23
$399.99
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18% off MSRP $485.23
$399.99
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For vehicles with production date from 09/2002


Genuine BMW Cylinder Head Cover -
This item fits the following BMW Chassis:
E39,E46,E53 X5,E83 X3,E85,E60,E61

Fits BMW Engines including:
M54

Oil Dipstick Guide Tube - E46 E39 Z4
Oil Dipstick Guide Tube - E46 E39 Z4
This oil dipstick guide tube is the updated part designed...
Genuine BMW - Corporate Logo
T#:2877
Part#: 11437565437
In Stock
12% off MSRP $138.61
$121.48
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12% off MSRP $138.61
$121.48
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This oil dipstick guide tube is the updated part designed to reduce the potential for clogging. We recommend replacing this item with the Crankcase oil separator valve repair kit as it is often plugged from oil sludge. This fits E46 323i 323ci 325i 325ci 328i 328ci 330i 330ci e39 528i 525i 530i Z4 2.5i 3.0i

This item fits the following BMWs:
1999-2005 E39 BMW 323i 323ci 325i(M54) 325ci (M54) 328i 328ci 330i 330ci - NOT for Xi models!
1999-2003 E39 BMW 525i 528i 530i
2003-2006 E85 BMW Z4 2.5i Z4 3.0i
Genuine BMW Cylinder Head Valve Cover - 11121432928 - E39 E46 E53 Z3 M52 M54
Genuine BMW Cylinder Head Valve Cover - 11121432928 - E39 E46 E53 Z3...
Genuine BMW replacement valve cover and gasket for a dama... For vehicles with production date up to 09/2002
Genuine BMW - Corporate Logo
T#:6590
Part#: 11121432928
In Stock
18% off MSRP $485.23
$399.99
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18% off MSRP $485.23
$399.99
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Genuine BMW replacement valve cover and gasket for a damaged or cracked valve cover.


Genuine BMW Cylinder Head Cover -
This item fits the following BMW Chassis:
E39,E46,E53 X5

Fits BMW Engines including:
M52,M54



Genuine BMW Oil Filter Housing Cover - E36 E46 E39 E60 X3 X5 Z3 Z4
Genuine BMW Oil Filter Housing Cover - E36 E46 E39 E60 X3 X5 Z3 Z4 ...
This Genuine BMW oil filter housing cover is the plastic ...
Genuine BMW - Corporate Logo
T#:6841
Part#: 11421744000
In Stock
15% off MSRP $45.63
$38.99
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15% off MSRP $45.63
$38.99
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This Genuine BMW oil filter housing cover is the plastic cap that screws onto the top of the oil filter housing on cars with the M52, M54 or M56 engines.

If you are looking for a more durable, easier to remove replacement, Turner Motorsport trusts ECS Tuning's Billet Aluminum Oil Filter Housing Caps

This item fits the following BMWs:
1995-1998 E36 BMW 323is 323ic 328i 328is 328ic
1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi
1997-2003 E39 BMW 525i 528i 530i
2004-2005 E60 BMW 525i 530i
2004-2006 E83 BMW X3 2.5i X3 3.0i
2000-2006 E53 BMW X5 3.0i
1997-2002 Z3 BMW Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i
2003-2006 E85 BMW Z4 2.5i Z4 3.0i

Oil Separator - E46 M3, MZ3, MZ4 with S54 engine
Oil Separator - E46 M3, MZ3, MZ4 with S54 engine
This Genuine BMW oil separator helps to remove oil from t...
Genuine BMW - Corporate Logo
T#:12913
Part#: 11157840446
In Stock
12% off MSRP $59.09
$51.90
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12% off MSRP $59.09
$51.90
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This Genuine BMW oil separator helps to remove oil from the air vented from the crankcase via a hose from the valve cover. When the crankcase vent valve fails it can cause excessive oil consumption, engine fault codes and poor idle. This crankcase vent valve is also know as Oil separator valve or PCV.

This item fits the following BMWs:
2001-2006 E46 BMW M3
2001-2002 Z3 BMW Z3 M Roadster M Coupe
2006-2008 E85 BMW Z4 M Roadster M Coupe
Oil Filler Cap - E90 E92 E60 E85 E86
Oil Filler Cap - E90 E92 E60 E85 E86
This Genuine BMW oil filler cap comes inscribed with &...
Genuine BMW - Corporate Logo
T#:19325
Part#: 11127500568
In Stock
11% off MSRP $17.62
$15.62
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11% off MSRP $17.62
$15.62
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This Genuine BMW oil filler cap comes inscribed with "BMW Castrol" and is a direct replacement for many late model BMW's.

When doing any sort of repair or maintenance there is no replacement for genuine factory parts. Turner Motorsport carries the Genuine BMW brand with pride and has the parts you need to complete your next project with confidence.

This item fits the following BMWs:
2003-2005 E46 BMW 325i 325ci - Only for M56 engine
2006-2011 E90 BMW 325i 325xi 330i 330xi - Sedan
2006-2012 E91 BMW 325xi - Wagon
2005-2007 E60 BMW 525i 525xi 530i 530xi
2006-2008 E85 BMW Z4 3.0i Z4 3.0si

Oil Dipstick Guide Tube - E46 325xi 330xi 2001-2005
Oil Dipstick Guide Tube - E46 325xi 330xi 2001-2005
This oil dipstick guide tube is the updated part designed...
Genuine BMW - Corporate Logo
T#:2892
Part#: 11437565438
In Stock
12% off MSRP $152.49
$133.64
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