BMW Maintenance & Tune-Up Parts for BMW Z Series E85/6 (2003-2008)

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Part of owning a BMW is the relationships we develop with our cars through years of driving pleasure and maintenance services alike. It is critical to guarantee the job is right the first time. With recommended OEM supplied components and by following the maintenance schedule, your BMW is sure to continue giving you years of enjoyment on the street or track. All the filters, service kits, service manuals, fluids, and more are right here to help keep your BMW in perfect shape.

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Automatic Transmission Service Kit - Level 2 - BMW GA6HP19Z Transmiss...
For vehicles equipped with automatic transmission GA6HP19Z *** Check Transmission Type Prior To Orde
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T#:5376301
Part#: 24117571217TMSKT
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Includes all the necessary components for a complete transmission service with Liqui Moly fluid Over the life of a vehicle, the transmission can often be overlooked when performing routine maintenance. If left unserviced, the automatic transmission fluid will break down, causing the valve body and filter to become contaminated with deposits and sludge. This will lead to poor shifting, slipping, and ultimately, transmission failure. Kit Includes: Automatic transmission oil pan with integrated filter Oil pan gasket Drain plug with sealing washer Fill plug with sealing washer 7 quarts Liqui Moly automatic transmission fluid
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T#:5376274
Part#: 11517586925TKT
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Everything you need to replace your water pump and thermostat. The water pumps in these BMW models are known for failure near 80,000 miles is a very common issue often times leaving the owner stranded. The aftermarket kit offered provides a single stop for water pump and thermostat replacement needs to save the search and get you back on the road. Kit includes: Mahle-Behr thermostat Water pump Genuine BMW coolant thermostat to water pump hose Mounting hardware required for both the thermostat and water pump
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High-Performance Ignition Service Kit - BMW N52 3.0L
For vehicles with production date from 04/2006
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T#:583536
Part#: N52PISKT
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Every 60-80,000 miles, we recommend replacing your spark plugs to ensure your ignition system is running optimally. Over time carbon can build up around the head of the spark plug and decrease spark strength and effectiveness, leading to weaker fuel mixture detonation, misfires, and potential check engine lights. To prevent this, have put together our High-Performance Ignition Service Kits. These kits include new Bav Auto High-Performance Ignition Coils, new spark plugs, dielectric grease, and a BMW spark plug service label to keep track of when your spark plugs were replaced.

Bav Auto's Ignition coils feature core windings that have been modified to increase firepower and promote a faster, more efficient burn. This gives your BMW/MINI increased torque in the lower range of RPM and more horsepower in the upper range. Exact improvements depend on the current condition of your engine, but you'll definitely feel the difference. They'll also improve your fuel economy.

From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.

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!

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Oil Pan Gasket - With Bolts
Bolts Are For Vehicles With Automatic Transmission ONLY
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T#:5403247
Part#: 11132210959TMSKT
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Gasket between oil pan and engine block. A common piece to begin leaking on any engine, oil pan gaskets begin to leak after a few years.

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T#:401664
Part#: VSK4KT2
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$ 143.84 USD
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Proper valve lash adjustment is critical for longevity and performance. If your S54 is due for valve adjustment maintenance you can do it yourself with this kit, saving hundreds of dollars in labor charges. 

Includes

  • Shim set 
  • Installation tool #83300493743
  • 16 Blade Feeler gauge set 

BMW recommends S54 valve inspection and adjustment every 30k miles.

*Click here for valve adjustment instructions*

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T#:578658
Part#: 65816905133-1KT
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Onboard computer not reading accurate ambient temperatures anymore? This kit includes everything you need to restore external temp monitoring to your BMW.

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T#:583532
Part#: S54PISKT
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Every 60-80,000 miles, we recommend replacing your spark plugs to ensure your ignition system is running optimally. Over time carbon can build up around the head of the spark plug and decrease spark strength and effectiveness, leading to weaker fuel mixture detonation, misfires, and potential check engine lights. To prevent this, have put together our High-Performance Ignition Service Kits. These kits include new Bav Auto High-Performance Ignition Coils, new spark plugs, dielectric grease, and a BMW spark plug service label to keep track of when your spark plugs were replaced.

Bav Auto's Ignition coils feature core windings that have been modified to increase firepower and promote a faster, more efficient burn. This gives your BMW/MINI increased torque in the lower range of RPM and more horsepower in the upper range. Exact improvements depend on the current condition of your engine, but you'll definitely feel the difference. They'll also improve your fuel economy.

From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.

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!

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Premium Differential Service Kit - E46 M3, E9X M3, E82 1 M Coupe ...
Includes BMW SAF-XJ limited slip differential fluid with FM booster
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T#:598688
Part#: E46M3DIFSERTMSKT
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Servicing your differential is an important job and should only be completed using high quality components! To ensure our customers are getting exactly what they need, we have put together this limited-slip differential service kit that includes all new fluid from BMW, a new BMW drain plug, and one of our new Titanium Magnetic Differential Drain Plugs!
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T#:30960455
Part#: TMSZ4MMTSKT1
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The oil in your manual transmission is extremely vital to the life of your transmission. Over time it will begin to break down, lose viscosity, and begin to allow excess heat and friction. This kit is the perfect remedy to this problem. Included are 2 Liters of Liqui-Moly Top Tec 5100 Manual Transmission Fluid, a URO fill plug, and an ECS Magnetic Drain Plug.
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T#:556738
Part#: N52TISKT
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Often an oversight in maintenance, ignition components are also susceptible to wear and tear. Spark Plugs can accumulate carbon, reducing the spark intensity and it's ability to properly ignite the air/fuel mixture, leading to misfires and generally declining performance. Other ignition components, such as coils, boots, wires, caps, and rotors, can also wear out over time due to factors like heat and contamination, preventing the current from reaching the spark plug.

To start over fresh with all new components, we now offer these Ignition Service Kits. Each kit comes with brand new OE quality components, replacing any potential fault points in your ignition system for peak performance!

See kit contents below for a complete list of included components.

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Packaged by Turner - Corporate Logo
T#:339100
Part#: TMS224320
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This is a customizable cooling system overhaul kit, which starts off with the basic radiator and water pump and can be configured to replace all the M54 common cooling system failure parts in one package. This cooling system package is for the 2003-2005 Z4 Roadster.

The Z4 cooling system is much like that of the sister 3 series. Several of the primary cooling components are prone to failure within 60k miles (or less in many cases). A failure in the cooling system can lead to overheating and catastrophic engine failure. Don't gamble your engine! By replacing these core items preventatively, such as the radiator & waterpump, you are defusing what could be a ticking cooling system time bomb. And if you've had a failure of one of these parts, now is the time to refresh your cooling system. Available with our kit is an OEM Behr radiator, an Original BMW water pump (with updated composite impeller), thermostat (complete with housing), radiator cap, new hoses, and other essential cooling parts.

Optional items (which can be added below):
  • Radiator cap
  • Major cooling hoses
  • Original BMW antifreeze
  • Upgrade the water pump to a Stewart EMP High Performance pump
  • Add a new coolant expansion tank (known for cracking)
  • Include a new coolant level sensor (known for failing / throwing "check coolant" messages)
  • Include a new coolant temp sensor (located in the lower radiator hose) (re-using the old sensor and seal may lead to a leak)
  • Add a new thermostat for an automatic transmission (located with the expansion tank).
    This cooling system overhaul kit fits the following BMWs:
    2003-2005 E85 BMW Z4 2.5i Z4 3.0i

    Please put a check in the boxes next to the items you wish to order.
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    T#:554529
    Part#: N5XATSKT
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    Automatic transmissions are reliable, shift smoothly, and can last without issue so long as they are properly maintained. Over time, the transmission fluid becomes thick and the filter becomes contaminated with small metal particles. This can cause excess wear, high transmission operating temperatures, and eventual failure. To prevent this we recommend changing your filter, fluid, and seals to ensure your transmission continues to operate flawlessly. We recommend filter and fluid changes every 50,000 miles. 

    Kit Includes:

    • Automatic transmission oil pan with integrated filter 
    • Oil pan gasket
    • Drain plug with sealing washer
    • Fill plug with sealing washer
    • 7 quarts Redline D4 automatic transmission fluid

    Fits the following BMWs:
    E84 BMW
    X1 xDrive35i
    E90 BMW 325i/xi, 328i/xi (with GA6HP19Z automatic transmission), 330i/xi, 335i/xi
    E91 BMW 325i/xi, 328i/xi (with GA6HP19Z automatic transmission)
    E92 BMW 328i/xi (with GA6HP19Z automatic transmission), 335i/x
    E93 BMW 328i (with GA6HP19Z automatic transmission),  335i
    E60 BMW 525i/xi, 528i/xi, 530i/xi, 535i/xi
    E61 BMW 525i, 530xi, 535xi
    E70 BMW X5 xDrive30i
    E71 BMW X6 35iX
    E82/88 BMW 128i(with GA6HP19Z automatic transmission), 135i (N54)
    F01/02 BMW 740i/Li
    E85/86/89 BMW Z4 3.0i/Si sDrive30i M54 N52

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    Packaged by Turner - Corporate Logo
    T#:640351
    Part#: 11317584084KT3
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    Timing chains can cause catastrophic problems with your N52 engine if it doesn't function properly. Common symptoms of failure include excessive vibration or “slap” from the timing chain, and the possibility of plastic particles throughout the oil. Symptoms typically begin to surface between 80,000 and 100,000 miles. If left untouched, the issue can compound itself so far as to allow the timing chain to jump out of time, leaving you with a potentially damaged head and larger repair costs. This kit has been assembled using genuine BMW and high quality aftermarket components. From new timing chain guides, to a replacement oil pan drain plug, this kit has you covered to assure that all the needed parts are on hand and ready to install.
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    T#:401675
    Part#: S54VADJKT1
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    BMW recommends valve adjustment every 30,000 miles on the S54 engine.This valve adjustment kit includes every thing needed to to a proper valve adjustment on the S54 engine. 

    Kit includes

    • Wiseco valve shims
    • Elring valve cover gasket set
    • BMW Valve shim Installation tool
    • Valve shim feeler gauge set 
    • Castrol TWS Edge Professional Engine Oil - 6 Quarts
    • Mann Oil Filter Kit
    • Oil pan drain plug 

    Please note the the included feeler gauge set allows you to stack feeler blades to get a more precise adjustment 

    *Click here for valve adjustment instructions*

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

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    Packaged by Turner - Corporate Logo
    T#:23482931
    Part#: S54KEVACCKT
    Ships in 8 Business Days
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    Eliminate your squeaking accessory belt pulley and cracked drive belt with this upgraded accessory belt service kit! This kit includes the ECS Kevlar Reinforced Drive Belts, tensioner assemblies, and new tensioner pulleys. ECS Tuning's Red Kevlar Accessory Belts are both an aesthetic improvement and a performance alternative to a traditional belt. Kevlar-reinforced belts experience less elongation over time minimizing the amount of belt adjustment needed as well as offering a higher shock and impact resistance compared to OEM-style belts. Refreshing the rollers and/or tensioners simultaneously is a great way to ensure all vital components of your drive belt system are functioning optimally for years to come!
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    Oil Drain Plug
    Automatic Transmission Only
    Packaged by Turner - Corporate Logo
    T#:41188174
    Part#: 11137535106TKT
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    Includes a one time use crush washer.

    Packaged by Turner - Corporate Logo
    T#:30960456
    Part#: TMSZ4MMTSKT
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    The oil in your manual transmission is extremely vital to the life of your transmission. Over time it will begin to break down, lose viscosity, and begin to allow excess heat and friction. This kit is the perfect remedy to this problem. Included are 2 Liters of Redline D4 ATF, which is recommended by Redline for this manual transmission and features a fully synthetic base for better protection and wear resistance, a URO fill plug, and an ECS Magnetic Drain Plug.
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    Packaged by Turner - Corporate Logo
    T#:339099
    Part#: TMS16430
    In Stock at Vendor
    Starting at $ 514.24 USD
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    This is a customizable cooling system overhaul kit, which starts off with the basic radiator and water pump and can be configured to replace all the M54 common cooling system failure parts in one package. This cooling system package is for the 2003-2005 Z4 Roadster.

    The Z4 cooling system is much like that of the sister 3 series. Several of the primary cooling components are prone to failure within 60k miles (or less in many cases). A failure in the cooling system can lead to overheating and catastrophic engine failure. Don't gamble your engine! By replacing these core items preventatively, such as the radiator & waterpump, you are defusing what could be a ticking cooling system time bomb. And if you've had a failure of one of these parts, now is the time to refresh your cooling system. Available with our kit is an OEM Behr radiator, an Original BMW water pump (with updated composite impeller), thermostat (complete with housing), radiator cap, new hoses, and other essential cooling parts.

    Optional items (which can be added below):
  • Radiator cap
  • Major cooling hoses
  • Original BMW antifreeze
  • Upgrade the water pump to a Stewart EMP High Performance pump
  • Add a new coolant expansion tank (known for cracking)
  • Include a new coolant level sensor (known for failing / throwing "check coolant" messages)
  • Include a new coolant temp sensor (located in the lower radiator hose) (re-using the old sensor and seal may lead to a leak)
  • Add a new thermostat for an automatic transmission (located with the expansion tank).
    This cooling system overhaul kit fits the following BMWs:
    4/2004-2005 E85 BMW Z4 2.5i Z4 3.0i

    Please put a check in the boxes next to the items you wish to order.
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    Turner Motorsport - Corporate Logo
    T#:20320749
    Part#: 12138616153T
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    Our BMW ignition coils are designed with performance and efficiency in mind. An engine needs 3 main components to run (Air, Fuel, Spark.) Turner ignition coils are modified to increase energy output; more energy output results in a faster, more efficient and consistent burn to make sure your fuel is being utilized to its maximum potential. Our signature Turner ignition coils feature a blue housing that give your engine the performance and aesthetic your looking for. Ignition coils should be changed every 40,000 - 60,000 miles and are an important maintenance item due to the essential role they play in your engines health, performance and efficiency. Choose Turner Ignition Coils to keep your engine running strong and healthy. Features and Benefits: Increased performance Direct fitment Signature Turner Blue finish
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    M Series Performance Ignition Coil - M52/M54/M62/M73/S52/S62 ...
    For vehicles with a production up to 09/2002 - vehicles produced after 09/2002+ will us...
    For vehicles up to 2002
    Turner Motorsport - Corporate Logo
    T#:20320746
    Part#: 12137599219T
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    Our M Series ignition coils are designed with performance and efficiency in mind. An engine needs 3 main components to run (Air, Fuel, and Spark.) Ignition coils are responsible for 1/3 of the operation of your engine and it would be smart to weigh the options when shopping. Turner M Series ignition coils are modified to increase energy output; more energy output results in a faster, more efficient, and consistent burn to make sure your fuel is being utilized to its maximum potential. Our signature Turner ignition coils feature a blue housing that gives your engine the performance and aesthetic your looking for. Ignition coils should be changed every 40,000 - 60,000 miles and are an important maintenance item due to the essential role they play in your engine's health, performance, and efficiency. Choose Turner Ignition Coils to keep your engine running strong and healthy. Features and Benefits: Increased performance Direct fitment Signature Turner Blue finish
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    Turner Motorsport - Corporate Logo
    T#:15876877
    Part#: 049453LA01-02
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    Introducing our Turner Motorsport Crank Seal Guard – the essential shield for your BMW's engine integrity. Safeguarding the heart of your vehicle, this meticulously designed guard offers robust protection for the crank seal concealed behind the harmonic balancer.

    Considered an indispensable maintenance component for your BMW, the Crank Seal Guard acts as a crucial defense against a potential and preventable catastrophe involving your accessory belt. Facing the reality of potential oil or coolant leaks in your engine, this guard becomes a reliable barrier, preventing these fluids from reaching the accessory belt. The consequence of a compromised belt includes walking, slipping, fraying, and rubber particles finding their way behind the harmonic balancer and into the crank seal – a scenario that can lead to severe engine failure.

    Let's be honest, engine leaks are a common occurrence, and whether your engine is currently leaking or not, the Crank Seal Guard is a proactive measure against future threats. The wear and tear on the accessory belt due to oil and coolant exposure can result in slipping, tearing, or, worst-case scenario, belt snapping – posing a significant risk to your engine's well-being.

    Prepare your car for the long haul and protect the vital components, It's not a matter of "if" but "when" your belt will become a problem, and our Crank Seal Guard is your proactive solution. Rigorously tested on N52/N54/N55 and S55 for 100% confirmed fitment, it stands as a reliable guardian for your engine's health. Invest in the protection your BMW deserves with the Turner Motorsport Crank Seal Guard.

    Key benefits:

    Protect crank seal from rogue accessory belts and their shredded debris
    Optimized to fit N52, N54, N55, and S55 engines
    Rigid design that fits within the space constraints between the engine block and harmonic balancer
    Zinc-coated fasteners for corrosion and oxidation resistance
    Design:

    Modeled and designed from FARO laser scanning and Solidworks CAD
    Manufactured from 6061 billet aluminum
    Turner blue anodizing
    Installation:

    It is a good idea to note how your belt is routed before starting the installation.

    2 securing bolts for crank seal guard - Torque value of 20Nm

    You will find either 6 or 8 E10 bolts are holding the harmonic balancer depending on the engine.

    E10 (P#11237564511) ​
    ​N52: 6 bolts - Torque value of 25nm
    N54: 6 bolts - Torque value of 35nm
    N55: 8 bolts - Torque value of 35nm

    E10 (P#11237575488)
    S55: 8 Bolts - Torque value of 35nm

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    Turner Motorsport - Corporate Logo
    T#:591153
    Part#: 026698TMS01-01
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    This is a must-have for ALL BMWs, and simply installs in place of your existing drain plug. With every oil change you perform on your BMW, you'll be able to inspect for metal shavings and debris. Many times, if something is going wrong on your BMW's engine, the magnetic drain plug can give you an early warning. Our championship race team uses this info all the time (Ever find a piece of a valve spring in your oil? We have!) Be sure to get one now, and make the swap next oil change!
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    Turner Motorsport - Corporate Logo
    T#:23383277
    Part#: TIGNITION6KT
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    Our BMW ignition coils are designed with performance and efficiency in mind. An engine needs 3 main components to run (Air, Fuel, Spark.) Turner ignition coils are modified to increase energy output; more energy output results in a faster, more efficient and consistent burn to make sure your fuel is being utilized to its maximum potential. Our signature Turner ignition coils feature a blue housing that give your engine the performance and aesthetic your looking for. Ignition coils should be changed every 40,000 - 60,000 miles and are an important maintenance item due to the essential role they play in your engines health, performance and efficiency. Choose Turner Ignition Coils to keep your engine running strong and healthy. Features and Benefits: Increased performance Direct fitment Signature Turner Blue finish
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    Turner Motorsport - Corporate Logo
    T#:21966009
    Part#: TMSS54IGNKT
    In Stock
    Sale - Save 8% $ 320.99

    This product was last offered at the strikethrough price on
    06-14-2026

    $ 293.72 USD
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    Sale - Save 8%
    $ 320.99

    This product was last offered at the strikethrough price on
    06-14-2026

    $ 293.72 USD
    Free Shipping
    High-performance ignition kit for your S54 featuring spark plugs, Turner high-performance ignition coils, and dielectric grease to make sure you have no issues at your next maintenance interval! Our BMW ignition coils are designed with performance and efficiency in mind. An engine needs 3 main components to run (Air, Fuel, and Spark). Turner ignition coils are modified to increase energy output; more energy output results in a faster, more efficient, and consistent burn to make sure your fuel is being utilized to its maximum potential. Our signature Turner ignition coils feature a blue housing that gives your engine the performance and aesthetic you're looking for. All Turner Ignition coils are backed by a confidence-inspiring 2-year warranty. Ignition coils should be changed every 40,000 - 60,000 miles and are an important maintenance item due to the essential role they play in your engine's health, performance, and efficiency. Choose Turner Ignition Coils to keep your engine running strong and healthy. Features and Benefits: Increased performance New spark plugs and grease Direct fitment Signature Turner Blue ignition coils Ignition coils backed by a 2-year warranty
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    Turner Motorsport - Corporate Logo
    T#:18070226
    Part#: 12137594937TKT
    In Stock
    Sale - Save 7% $ 277.99

    This product was last offered at the strikethrough price on
    02-26-2026

    $ 259.77 USD
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    Sale - Save 7%
    $ 277.99

    This product was last offered at the strikethrough price on
    02-26-2026

    $ 259.77 USD
    Free Shipping
    High-performance ignition kit for your N52 featuring spark plugs, Turner high-performance ignition coils, and grease to make sure you have no issues at your next maintenance interval! Our BMW ignition coils are designed with performance and efficiency in mind. An engine needs 3 main components to run (Air, Fuel, and Spark). Turner ignition coils are modified to increase energy output; more energy output results in a faster, more efficient, and consistent burn to make sure your fuel is being utilized to its maximum potential. Our signature Turner ignition coils feature a blue housing that gives your engine the performance and aesthetic you're looking for. Ignition coils should be changed every 40,000 - 60,000 miles and are an important maintenance item due to the essential role they play in your engine's health, performance, and efficiency. Choose Turner Ignition Coils to keep your engine running strong and healthy. Features and Benefits: Increased performance New spark plugs and grease Direct fitment Signature Turner Blue ignition coils
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    Turner Motorsport - Corporate Logo
    T#:18070225
    Part#: 12131712219TKT1
    In Stock
    Sale - Save 13% $ 267.77

    This product was last offered at the strikethrough price on
    06-14-2026

    $ 232.70 USD
    Free Shipping
    Sale - Save 13%
    $ 267.77

    This product was last offered at the strikethrough price on
    06-14-2026

    $ 232.70 USD
    Free Shipping

    High performance ignition kit for your M54 featuring spark plugs, Turner high performance ignition coils and grease to make sure you have no issues at your next maintenance interval!

    Our BMW ignition coils are designed with performance and efficiency in mind. An engine needs 3 main components to run (Air, Fuel, Spark.) Turner ignition coils are modified to increase energy output; more energy output results in a faster, more efficient and consistent burn to make sure your fuel is being utilized to its maximum potential. Our signature Turner ignition coils feature a blue housing that give your engine the performance and aesthetic your looking for.

    Ignition coils should be changed every 40,000 - 60,000 miles and are an important maintenance item due to the essential role they play in your engines health, performance and efficiency. Choose Turner Ignition Coils to keep your engine running strong and healthy.

    Features and Benefits:

    Increased performance
    New spark plugs and grease
    Direct fitment
    Signature Turner Blue ignition coils

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    Beru - Corporate Logo
    T#:338884
    Part#: FGR-6DDU
    Back Ordered
    Sale - Save 17% $ 23.99

    This product was last offered at the strikethrough price on
    05-14-2026

    Starting at $ 20.00 USD
    Free Shipping on orders $49 and up
    Sale - Save 17%
    $ 23.99

    This product was last offered at the strikethrough price on
    05-14-2026

    Starting at $ 20.00 USD
    Free Shipping on orders $49 and up
    RACING SPARK PLUG FOR M50/M52/M54 ENGINES
    These spark plugs are recommended by BMW Motorsport for use in their DTC racing engines. We find a slight horsepower increase and greatly increased durability over the OEM road car spark plugs in competition use. We attribute the improvements to the fact that these spark plugs are designed for the high temperatures and cylinder pressures encountered in a racing engine. These spark plugs are a direct replacement and come pre-gapped just like the factory road car plugs.
    Please note: these plugs are not for the S54 engine in the E46 M3, MZ3, or Z4 M
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