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

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Turner Motorsport has everything you need to upgrade your BMW through our stages of performance or to keep your car in peak condition with our range of the latest in proven OEM cooling parts. Upgrade your cooling system and engine performance with the selections below to give your BMW a performance and reliability advantage.

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Victor Reinz - Corporate Logo
T#:374781
Part#: 11367831938
In Stock at Vendor
$ 18.75

This product was last offered at the strikethrough price on
05-11-2026

$ 18.41 USD
Free Shipping on orders $49 and up
$ 18.41 USD
Free Shipping on orders $49 and up
Used to seal the Vanos unit to the cylinder head
Mishimoto - Corporate Logo
T#:51110138
Part#: MMIG-BMW-07
Ships in 4 Business Days
New Item
$ 41.99 USD
Free Shipping on orders $49 and up
Mishimoto’s Delphi-style ignition coils offer a premium solution for BMW owners looking to replace worn-out factory units.
OEM Lemforder Engine Mount - 22116779970 - E46, E89 & E85 Z4 ...
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Lemforder - Corporate Logo
T#:399290
Part#: 22116779970
In Stock at Vendor
$ 70.87

This product was last offered at the strikethrough price on
07-09-2026

$ 70.26 USD
Free Shipping on orders $49 and up
$ 70.26 USD
Free Shipping on orders $49 and up

Don't neglect your motor mounts! Most stock BMW motor mounts are fluid filled and the stiffness of the mount depends on this fluid. But over time the fluid leaks out and the strength of the mount is greatly reduced. A worn motor mount allows the engine to twist and shift around. The harder you're driving the more shift will occur. As the engine is moving around it can contact other parts in the engine bay - usually cooling related. The mechanical fan can hit the radiator; the A/C compressor can hit a radiator hose, the exhaust will flex and may break. Twisting of the engine can also lead to shifting problems as the transmission twists with it. There are countless issues related to worn or compressed motor mounts so don't overlook these as a regular replacement item (every 50,000 miles).

OEM Lemförder is an engineering company that focuses on high-quality, precision manufacturing of critical suspension and steering components. Providing exceptionally high quality parts directly to BMW, as well as 50+ other big name automotive companies, such as Mercedes and Audi, their history of reliability and variety of offered parts makes them one of the biggest names for a go-to OEM parts provider. Lemförder parts place an important emphasis on design, production, and assembly, ensuring maximum reliability. They even coat all parts possible with corrosion protection for extended longevity.

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!

This item fits the following BMW Chassis:
E46
Non-M
E85 Z4 2.5i/3.0i/3.0si
E89 Z4 3.0si

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Mishimoto - Corporate Logo
T#:51075078
Part#: MMIG-BMW-0204
Ships in 4 Business Days
New Item
$ 123.99 USD
Free Shipping on orders $49 and up
The Mishimoto BMW Ignition Coil is built to handle the intense heat cycles found in BMW’s modern turbocharged and naturally aspirated engines.

Return Pipe
For vehicles with production date from 01/2000
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
URO - Corporate Logo
T#:372847
Part#: 11617504536
Ships in 2 Business Days
$ 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
Bushing Contact With Wire Lead - Priced Each
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
URO - Corporate Logo
T#:14783536
Part#: 61130005199
In Stock
$ 3.99 USD
Free Shipping on orders $49 and up

SPA Performance - Corporate Logo
T#:44563338
Part#: EVCVSB02
Back Ordered
$ 1,049.99 USD
Free Shipping on orders $49 and up
If you are building an M54 engine for the best possible performance, SPA Performance's 264° / 248° High Performance Camshaft Set may be just what you need! Performance camshafts allow for greater valve lift and increased lift duration, enabling your engine to breathe easier and faster, increasing the amount of fresh air entering the cylinders while allowing more of the exhaust gases to fully exit the cylinders.
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AGA Tools - Corporate Logo
T#:5135636
Part#: AGA-CP-0-14
Ships in 7 Business Days
$ 8.99 USD
Free Shipping on orders $49 and up
Don't let dirt be the reason for bad fuel injectors.

Pressure Hose
For vehicles with production date up to 03/2003
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
URO - Corporate Logo
T#:372643
Part#: 11727555680
Ships in 2 Business Days
$ 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

Victor Reinz - Corporate Logo
T#:593866
Part#: 11617830104
In Stock at Vendor
$ 11.99 USD
Free Shipping on orders $49 and up
Placed between the intake hose and air box. This rubber gasket is found between the intake hose and air box.
Lisle - Corporate Logo
T#:641682
Part#: LIS22850
Ships in 6 Business Days
$ 17.99 USD
Free Shipping on orders $49 and up
A must for any car enthusiast.
Victor Reinz - Corporate Logo
T#:369383
Part#: 12611744292
In Stock at Vendor
$ 9.99

This product was last offered at the strikethrough price on
03-03-2026

$ 8.99 USD
Free Shipping on orders $49 and up
$ 8.99 USD
Free Shipping on orders $49 and up
Used to seal sensor to the oil pan


Genuine BMW - Corporate Logo
T#:375139
Part#: 11121726238
In Stock
$ 1.99 USD
Free Shipping on orders $49 and up
10.5MM
BMW Exhaust Manifold Gasket
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Elring - Corporate Logo
T#:15213955
Part#: 11627522585
In Stock at Vendor
$ 71.99

This product was last offered at the strikethrough price on
05-08-2026

$ 69.99 USD
Free Shipping on orders $49 and up
$ 69.99 USD
Free Shipping on orders $49 and up
Replacement exhaust manifold gasket, for your noisy leaking exhaust. Recommended to be replaced every time the exhaust manifold is removed to prevent leaks and ensure your vehicle is running at full potential.
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General Purpose Hose Clamp - Priced Each
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:592737
Part#: 07129952104
Ships in 4 Business Days
$ 6.99 USD
Free Shipping on orders $49 and up

Performance Tool - Corporate Logo
T#:1809133
Part#: W80575
Ships in 1 Business Day
$ 17.62 USD
Free Shipping on orders $49 and up
Comfortable vinyl grip handles.

Elring Oil Level Sensor O-Ring
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Elring - Corporate Logo
T#:596461
Part#: 12611744292
In Stock
$ 11.71

This product was last offered at the strikethrough price on
07-08-2026

$ 5.23 USD
Free Shipping on orders $49 and up
$ 5.23 USD
Free Shipping on orders $49 and up
Used to seal sensor to the oil pan

Meistersatz - Corporate Logo
T#:360224
Part#: 11421719855
Ships in 3 Business Days
$ 5.99 USD
Free Shipping on orders $49 and up
This is the replacement for the troublesome oil filter profile gasket on the M50, S50US, M52, S52, M52TU, M54, and S54 engines. The housing is separate from the engine block and in between there is this small profile gasket. The gasket shrinks over time which allows oil to seep out. In our own service shop, it's one of the most common service jobs we perform. 

One of the other common leak points is the VAN0S oil line and its seals. Since the line comes out with the oil filter housing anyway you might as well replace the line itself or at least the seals. 

On S54 engines (E46 M3, MZ3, Z4 M) there is a flanged head bolt going into the cylinder head, behind the thermostat cover. This holds the left side timing chain guide rail in place and if it's loose or falls out you could have a very serious engine failure to deal with. Make sure to check this bolt while you're replacing the oil filter housing seal. You only need to make sure it's tight. But if it's come loose you may want to replace the seal ring and use a small touch of oil-resistant thread sealer. 
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Gear Wrench - Corporate Logo
T#:641411
Part#: KDT2979
Ships in 6 Business Days
$ 10.99 USD
Free Shipping on orders $49 and up
Sharp, tempered point scribes metal

Victor Reinz - Corporate Logo
T#:13233505
Part#: 12141402705
In Stock at Vendor
$ 1.49 USD
Free Shipping on orders $49 and up
This O-Ring can sometimes leak at the bottom of your engine and need to be replaced. Fits around the head of the lower crankshaft sensor and provides a connection point.
Victor Reinz - Corporate Logo
T#:593918
Part#: 11127521009
Ships in 1 Business Day
$ 92.80 USD
Free Shipping on orders $49 and up
Cylinder head valve cover GASKET e46 325i with M56 engine Fits BMW Engines including: M56


Fuel Injector Clinic - Corporate Logo
T#:6843916
Part#: IS801-0775H
Ships in 2 Business Days
$ 599.00 USD
Free Shipping
$ 599.00 USD
Free Shipping
High performance fuel injectors featuring high impedance Bosch core, E85 compatible, with a lifetime warranty. This injector set is precisely matched using Fuel Injector Clinic's proprietary Data Match Technology. Each injector is individually serial numbered and the results are provided on the Data Match Sheet providing the most complete flow matching and latency value information available in the industry today. Fuel Injector Clinic injectors are flow tested and rated at 43.5psi (3Bar) at 90deg F fuel temperature using CF-16B calibration fluid. A superior short pulse width control and state of the art matching make these injectors easy to tune and provide great drivability. Every injector is covered against failure caused by defects in original manufacture by a lifetime warranty.
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Norma - Corporate Logo
T#:594670
Part#: 64218367179
In Stock at Vendor
$ 3.99

This product was last offered at the strikethrough price on
05-07-2026

$ 2.99 USD
Free Shipping on orders $49 and up
$ 2.99 USD
Free Shipping on orders $49 and up
Clamps are like bolts and nuts, as you can never have enough of them. If you do work on your vehicle in your home, you are going to need clamps often. If you need one clamp, why not get a few to ensure that you are always prepared.
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DeatschWerks - Corporate Logo
T#:53820907
Part#: 16M-30-1500-6
In Stock at Vendor
New Item
$ 1,259.00 USD
Free Shipping on orders $49 and up
If you are pushing the limits of your naturally aspirated build, the DeatschWerks fuel injector kit provides the reliability you need.

CSF Universal Large Single-Pass Oil Cooler - Universal Application ...
Universal fitment design - modifications may be necessary to run this cooler
CSF - Corporate Logo
T#:53608839
Part#: 8371
Ships in 4 Business Days
New Item
$ 499.00 USD
Free Shipping
$ 499.00 USD
Free Shipping
CSF redesigned this cooler and went with a more traditional inlet/outlet orientation. The new single pass design features high efficiency and high durability, but with vertically oriented inlet and outlet connections.
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Elring Rear Engine Seal - E30, E32, E34, E36, E39, E46, E53, E60, E83...
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Elring - Corporate Logo
T#:580020
Part#: 702.994
In Stock
$ 20.99

This product was last offered at the strikethrough price on
06-26-2026

$ 17.99 USD
Free Shipping on orders $49 and up
$ 17.99 USD
Free Shipping on orders $49 and up
Replace when doing clutch job
King - Corporate Logo
T#:25706111
Part#: CR6877XP0.25
Ships in 3 Business Days
$ 300.99 USD
Free Shipping on orders $49 and up
King's Racing Line of Performance Engine Bearings are for enthusiasts looking for an upgraded, coated connecting rod bearing to replace their OE bearings with. Constructed of a tri-metal base, these bearings are coated in a polymer-based coating to create a thermal barrier between your connecting rods and crankshaft. Complete Set of Bearing Shells - .025 Oversize
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Upper Oil Separator Vent Tube
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:384805
Part#: 11611440317
Ships in 4 Business Days
$ 20.30 USD
Free Shipping on orders $49 and up
Rein Fuel Injector O-Ring - E23, E24, E28, E30, E31, E32, E34, E36, E...
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:362382
Part#: 13641730767
In Stock at Vendor
$ 6.17 USD
Free Shipping on orders $49 and up
Located on nozzle end of injector

Active Autowerke - Corporate Logo
T#:340093
Part#: AASC-E46M3
Ships in 10 Business Days
Starting at $ 7,995.00 USD
Starting at $ 7,995.00 USD
Race on Sunday, to sell on Monday. This old saying is indicative of the new Generation 8 supercharger system for the E46 M3. Through countless hours of testing, it has often been quoted that the true test has always been a race environment. What better venue than Brock Yates One Lap of America Race. With a rigorous 7,000 miles to be covered within a week, and to compete against the likes of Porsches, Corvettes, Nissan GTRs, this would be the testing grounds for the new Generation Active Autowerke Supercharger system. The Active Autowerke Generation 8 Supercharger System not only proved its worth by being the highest ranked BMW within the field, but also ranked 1st in its class..

The data and technology that made this winning combination is now being applied in the new Generation 8 of the Active Autowerke supercharged E46 M3 level 1. Reliability and power is needed if you want to be on the podium, and this new Generation 8 will deliver exactly that. Consistent, repeatable runs of over 415 WHP (525 engine horsepower) were also recorded on the Active Autowerke chassis dyno in hot 94 + degree Fahrenheit conditions with humidity in the 60% + range. These run conditions might be considered a deterrent and not really suited, but it is better knowing the horsepower numbers are under such conditions, since higher horsepower numbers will only increase as the temperature falls and the air becomes more dense.

Stage 1 Performance Specs:
Power : 525 BHP @ 7650 rpm
Torque : 335 ft/lbs @ 5400 rpm
Boost Level : 7-8 psi

Key Features:
  • Rotrex 92 Trim Supercharger
  • Active Autowerke Gen 7 Intake Manifold w/ Dual By Pass Valve
  • Front Mount Air to Air Intercooler
  • Turbo like speed with linear power delivery
  • Large Fuel Injectors
  • Supercharger Oil Cooler
  • Colder Heat Range Spark Plugs
  • High Performance AA Spec Green Filter
  • Active Autowerke High Performance Software
  • All Mounting Hardware, plumbing, hoses and clamps
  • Proven Horsepower gains even under extreme conditions
  • Installation Instructions included
  • 2 Year Limited Warranty
    Want even more power? Upgrade to the Stage 2 kit with Larger Intercooler & Fuel System.
    The stage 2 System boosts the S54's power output to over 600BHP and includes an upgraded fuel system (includes two fuel pumps, fuel filter, all new -6 lines, fuel pressure regulator, dead end fuel rail, upgraded injectors and all required fittings). This ugpraded fuel system is a must once reaching these increased boost levels due to the fact that the factory fuel system is simply inadequate at this level. The stage 2 system also use a larger front mount air to air intercooler and the Active Autowerke custom methanol injection system. NOTE: Level 2 supercharger system is designed and engineered to operate in conjunction with the Active Autowerke Water/Methanol system as an integral part of the kit. Reasons to incapacitate, isolate, turn off, or not installing this system can and will void all warranty and related claims associated to the proper function of the specified Active Autowerke supercharger system.

    Stage 2 Performance Specs:
    Power � : � 605 BHP @ 7000 rpm
    Torque � : � 395 ft/lbs @ 5400 rpm
    Boost Level � : � 11-12 psi

    Custom built to order. Please allow 2-3 weeks for delivery.

    This item fits the following BMWs:
    2001-2006 E46 BMW M3, M3 Convertible
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    DeatschWerks - Corporate Logo
    T#:35391022
    Part#: 16MX-30-1200-6
    Ships in 3 Business Days
    $ 819.00 USD
    Free Shipping on orders $49 and up
    Maximize your engine's potential with the DW 1200cc Injector Set, a solution that bridges the gap between raw power and streetable drivability.
    Victor Reinz - Corporate Logo
    T#:376078
    Part#: 11141736758
    In Stock at Vendor
    $ 3.99

    This product was last offered at the strikethrough price on
    05-07-2026

    $ 2.99 USD
    Free Shipping on orders $49 and up
    $ 2.99 USD
    Free Shipping on orders $49 and up
    O-ring in the valve train
    Packaged By Turner - E46 325i/Ci Power Pack
    For vehicles with production date up to 02/2003 with Bosch alternator
    Packaged by Turner - Corporate Logo
    T#:41289783
    Part#: 787406TKT
    Ships on Nov 3, 2026
    Sale - Save 5% $ 1,955.99

    This product was last offered at the strikethrough price on
    05-03-2026

    $ 1,859.91 USD
    Sale - Save 5%
    $ 1,955.99

    This product was last offered at the strikethrough price on
    05-03-2026

    $ 1,859.91 USD
    Improve your cars efficiency and performance with this effective and simple upgrade kit!


    Active Autowerke - Corporate Logo
    T#:397299
    Part#: 12-022
    Ships in 10 Business Days
    5% off MSRP $ 2,249.00

    MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

    $ 2,136.99 USD
    Free Shipping
    5% off MSRP
    $ 2,249.00

    MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

    $ 2,136.99 USD
    Free Shipping
    As the producer of one of the finest working supercharger systems for the BMW E46 M3, Active Autowerke is proud to introduce the PRIMA PLUS supercharger system capable of exceeding 500 WHP running on pump drawn 93 octane. The PRIMA PLUS is an upgrade kit to the existing PRIMA supercharger system designed to create MORE horsepower. In collaboration with Frank Smith of Tuning Tech FS, the Prima PLUS SC kit has evolved as a fantastic performer. With numerous dyno runs under countless hours all monitored through careful Data Logging and Lean/Rich evaluation, this PRIMA PLUS supercharger kit is ready for the BMW enthusiast. The PRIMA PLUS is a centrifugal design supercharger using a conventional fixed drive pulley, but unlike its predecessors, the PRIMA PLUS also has variable boost settings of 9.0 psi and 9.5 psi to help attain the power. A first in the BMW forced induction industry. For easy comparisons, here is where the PRIMA and PRIMA PLUS + stands when measuring rear wheel horsepower. A stock BMW E46 M3 is around 265 WHP. | PRIMA SC makes 425 WHP. | PRIMA PLUS SC makes 500+ WHP.
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    Gear Wrench - Corporate Logo
    T#:30164626
    Part#: KDT84040H
    Ships in 6 Business Days
    $ 59.48 USD
    Free Shipping on orders $49 and up

    Features:

    • Versatile Shapes: Perfect for leveraging or pulling parts, springs, and cotter pins.
    • Easy Access: Designed to navigate around wiring, hoses, and other engine bay obstacles.
    • Durable Blade: Full polish alloy steel blade resists rust and corrosion.
    • Ergonomic Handle: Tri-lobe dual material handle ensures strength and efficiency.
    • Long-Lasting: Oil and solvent resistant handle extends tool life.
    • Complete Set: Includes mini full hook, 90° mini hook, mini straight hook, and mini offset hook.
    • Organized Storage: Comes with a pouch for easy storage and organization.
    • High Standards: Meets or exceeds ASME standards for performance and quality.


    Includes:

    • Mini Full Hook
    • 90° Mini Hook
    • Mini Straight Hook
    • Mini Offset Hook
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    Victor Reinz - Corporate Logo
    T#:593755
    Part#: 11157832119
    Ships in 1 Business Day
    $ 9.67 USD
    Free Shipping on orders $49 and up


    BMW Profile-Gasket
    This item fits the following BMW Chassis:
    E46 M3,E85 Z4M,E46,E85 Z4,E86 Z4

    Fits BMW Engines including:
    S54


    Active Autowerke - Corporate Logo
    T#:397295
    Part#: 12-021
    Ships in 10 Business Days
    5% off MSRP $ 9,375.00

    MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

    $ 8,906.99 USD
    Free Shipping
    5% off MSRP
    $ 9,375.00

    MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

    $ 8,906.99 USD
    Free Shipping

    Since getting their start in 1981, Active Autowerke has earned a well-respected reputation in the BMW community for engineering high-quality power solutions for popular BMW models. This supercharger kit will produce 425 horsepower and 295 ft.lbs. of torque on your BMW, while retaining platform integrity and daily driveability. Unique to the design of the Rotrex supercharger is the traction drive system, which eliminates the lag often found in other centrifugal supercharger setups. Power delivery is smooth and dependable, and 100% reversible to stock if you so choose, since each system is designed as a self-contained unit. best of all, when you crave more power, this kit is fully upgradeable to Level 1 and Level 2 specs.

    Kit features:

    • Rotrex C38-92 trim supercharger running 5.8 PSI of boost
    • Active Autowerke GEN 7 intake manifold
    • Active Autowere dual blow-off valve setup
    • Active Autowerke Air Filter
    • Alpha N software tune w/ SIMON2 interface
    • 6 high-flow fuel injectors
    • Dedicated oil cooling system
    • All mounting hardware, plumbing, hoses, & clamps
    • Illustrated instruction manual & installation guide
    • 2 year warranty with free tech support

    Base Prima supercharger Dynojet results:
    Boost: 5.8 psi
    Stock Horsepower:  285.4 WHP @ 7500 RPM
    Stock Torque: 232.36 LB-FT @ 5250 RPM
    Supercharged Horsepower: 426.69 WHP @ 8150 RPM
    Supercharged Torque: 297.99 LB-FT @ 7200 RPM

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    Performance Tool - Corporate Logo
    T#:1809138
    Part#: W125C
    Back Ordered
    $ 9.99 USD
    Free Shipping on orders $49 and up
    Thickness Gauge (32 Blades)
    SEG Automotive - Corporate Logo
    T#:54851980
    Part#: 12317519618
    In Stock at Vendor
    New Item
    $ 503.99

    This product was last offered at the strikethrough price on
    07-16-2026

    $ 452.99 USD
    Free Shipping on orders $49 and up
    $ 452.99 USD
    Free Shipping on orders $49 and up

    Ina - Corporate Logo
    T#:42200949
    Part#: FB4K339
    Ships in 3 Business Days
    $ 11.99 USD
    Free Shipping on orders $49 and up
    $ 11.99 USD
    Free Shipping on orders $49 and up
    For your next Serpentine Belt replacement use this OEM INA alternative and ensure your BMW’s accessory systems perform flawlessly under all conditions.
    Packaged by Turner - Corporate Logo
    T#:2849
    Part#: TMS2849
    Ships in 6 Business Days
    Sale - Save 3% $ 751.99

    This product was last offered at the strikethrough price on
    05-03-2026

    $ 729.43 USD
    Free Shipping
    Sale - Save 3%
    $ 751.99

    This product was last offered at the strikethrough price on
    05-03-2026

    $ 729.43 USD
    Free Shipping
    2001-2006 E46 325i/Ci/Xi/iT (M54 engine) Stage 1 Performance Package
    Peak Power Gain: +8hp / +8ft-lbs
    Rev limit: 7000
    Octane: 91 or higher

    Our Stage 1 kit featuring a cold-air intake kit and matching performance software. The aFe intake is a cone filter with a heat-blocking shield around it. The larger surface area of the filter, combined with the heat shield, allow more cool air to enter the engine - creating more power and torque, a richer engine sound, and better throttle response. The kit is supplied complete with heat shield, intake tube, sealing materials, hardware, and install instructions.

    The software is tuned by BMW tuning whiz Jim Conforti and supplied with the Shark Injector. The Shark Injector is a do-it-yourself reflash tool that plugs into the OBD diagnostic plug in your dash. With the push of a button, it will copy your stock software and reflash your computer with the performance tune. You can set it back to stock at any time by following the same procedure.

    Both of these items are packaged and work together. They provide a solid performance boost with a low upfront cost. For an excellent 'bang for the buck' upgrade, the software and intake are a great choice (TMS Underdrive Pulleys would also be on that list).

    Related Upgrades: We are often asked what would complement our software and intake packages. Within any Stage, we recommend our Underdrive Power Pulley Kits. The Power Pulley Kit will under-drive the alternator, water pump, and power steering pump. Under-driving means each component is moving slower which requires less power. The saved horsepower is put back to the engine where it transfers to power at the wheels. Power gains are typically 10 horsepower at the wheels.

    We also recommend upgrading the cat-back muffler for slightly more performance, lighter weight, and a more-aggressive sound. Our favorite E46 mufflers are the Supersprint, Borla, or Corsa exhausts. The Supersprint is the quietest and most like stock while the Corsa is the most aggressive (Borla being in the middle). You can expect a gain of 5whp with any of these exhausts.

    2001-2006 E46 325i/Ci/Xi/iT (M54 engine) Stage 1 Engine Upgrade includes:
    aFe Cold Air Intake (filter, heat shield, intake tube)
    Shark Injector performance software

    Applications:
    2001-2006 E46 325i sedan, 325Ci coupe and convertible, 325Xi sedan, 325iT wagon, 325XiT wagon ( M54 engine only).
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    Ina - Corporate Logo
    T#:42301969
    Part#: ZG0581
    Ships in 8 Business Days
    $ 25.99 USD
    Free Shipping on orders $49 and up
    $ 25.99 USD
    Free Shipping on orders $49 and up
    This guide is used to provide tension to the timing chain, but it wears over time. These plastic tensioners also become brittle with time and mileage, usually cracking and/or breaking completely. A common sign of worn timing chain components is noise from the timing chain area.
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    Black Forest Industries - Corporate Logo
    T#:50934269
    Part#: BFI-BMW-TRANS-01
    Ships on Aug 24, 2026
    New Item
    $ 69.99 USD
    Free Shipping on orders $49 and up
    This kit is a "must-have" for any E36, E46, or E9X owner looking to tighten up their drivetrain's foundation and ensure long-term mechanical reliability.
    OEM INA Accessory Belt - E46 E39 E53 E83 E85
    For vehicles with production date from 09/2002
    Ina - Corporate Logo
    T#:42200957
    Part#: FB6K458
    Back Ordered
    $ 19.99 USD
    Free Shipping on orders $49 and up
    $ 19.99 USD
    Free Shipping on orders $49 and up
    Trust Turner Motorsport for high-quality replacement parts like the INA Accessory Belt, engineered to keep your BMW’s engine accessories running smoothly and efficiently.
    Hitachi - Corporate Logo
    T#:48850055
    Part#: 12147518628
    Ships in 2 Business Days
    $ 71.99 USD
    Free Shipping on orders $49 and up
    The camshaft position sensor is essential for assisting the engine DME by monitoring the camshaft's position. The data from this sensor is key to optimizing ignition timing and ensuring smooth engine performance. Often referred to as the CMP sensor, this component is crucial for the overall functionality of the powertrain. A failing camshaft position sensor can cause a range of issues, including engine stumbling, hesitation during acceleration, power loss, and even starting difficulties or complete failure to start.
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    Hitachi Ignition Coil - BMW M54 S54 N62 N73
    For vehicles with production date up to 06/2009
    Hitachi - Corporate Logo
    T#:48815451
    Part#: 12131712219
    Ships in 6 Business Days
    $ 57.99 USD
    Free Shipping on orders $49 and up
    $ 57.99 USD
    Free Shipping on orders $49 and up
    Get your spark back with new ignition coils.
    Victor Reinz - Corporate Logo
    T#:593777
    Part#: 11127555758
    Ships in 9 Business Days
    $ 220.99 USD
    Free Shipping on orders $49 and up
    Replacement Cylinder Head Gasket from Victor Reinz