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Turner recommends replacing these bolts when replacing your starter as these bolts are aluminum and torque to yield - making them one time use bolts.

We recommend the Bosch replacement starter to get your vehicle back on the road.

Bosch ZR5TPP33S spark plug for  engines. Listed as BMW part #'s 12120037582 and 12120037575. Over time spark plugs become contaminated, worn, and "fouled out". This can cause a weak or missing spark leading to issues with fuel efficiency, misfires, check engine codes, and poor idle or even direct damage to your catalytic converter. This OEM spark plug made by Bosch will restore OE spark plug operation and function, returning lost power and fuel efficiency.

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!

Includes connector housing with terminals and seals. Commonly used for the pencil-style ignition coil connector.

ECS Tuning replacement harness connectors include all necessary pins and wire seals for a complete harness repair. Whether you have a broken harness connector or need a complete wiring repair, we have the components you need.

Each connector includes an additional terminal in case one becomes lost or damaged during installation.

*OEM cross reference PN# 12527519996 - Commonly used for the pencil-style ignition coil connector.

Please reference the original part number from the existing connector to confirm fitment, before ordering.

Suggested tools:

Suggested crimping pliers: T#387193
Wire De-pin tools:
12pc De-Pin Tool Set - T#386379
23pc De-Pin Tool Set - T#641943

High performance ignition kit for your N54/N55 featuring colder stepped spark plugs, Turner high performance ignition coils and grease to make sure you have no issues at your next maintenance interval! Included plugs are one Step colder for N55, Two step colder for N54.

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

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!

Transform your N54-powered BMW with the Turner Motorsport B58 Ignition Coil Conversion Kit—the ultimate solution for ignition system reliability and performance. Designed to eliminate the notorious misfires and power loss caused by factory OE pencil-style ignition coils, this kit is a game-changer for stock and modified vehicles alike. Whether you're chasing more power or improved drivability, the B58 ignition coils deliver up to 2.3x more spark energy, unleashing the full potential of your engine.

Why upgrade? The answer is simple: B58 ignition coils outperform all other ignition upgrades on the market with unparalleled spark energy and reliability. Ideal for high-performance builds or daily drivers, this kit eliminates common ignition problems while supporting increased power demands from software tunes like MHD or BM3. Plus, with the included plug-and-play wiring harness and proprietary boots, installation is seamless—no cutting or splicing is required.

Features:

Up to 2.3x More Spark Energy: Maximizes overall performance, offering sufficient output for heavily modified engines.
Plug-and-Play Installation: Includes custom brackets, wiring harnesses, and boots designed for factory mounting locations—no modifications needed.
DME Compatibility: Compatible with factory engine management software for hassle-free integration.
Rugged Durability: Bolt-on brackets are precision-machined from 6061-T6 aluminum with a sleek black anodized finish for a premium look and long-lasting performance.
Proprietary Design: Boots feature a built-in 1k OHM resistor to prevent electrical contact failures commonly seen in other kits.
Kit Contents:

(6) Turner Motorsport B Series Ignition Coils for N554/N55
(6) Turner Motorsport B58 Ignition Coil Conversion Wiring Harnesses
(6) Turner Motorsport B58 Ignition Coil Conversion Brackets
Optional Kit Selections:

Spark Plugs:
Bosch ZGR6STE2 (OEM)
NGK 97968 (One Step Colder)
NGK 97506 (Two Steps Colder)
Spark Plug Socket:
Schwaben 14mm 12pt Magnetic Socket
Schwaben 14mm 12pt Swivel Socket
Turner Motorsport offers a comprehensive installation guide, including detailed removal instructions and high-resolution images.

Featuring silver fine wire center electrode - Superior ignition ability increases engine power!

Although these come pre-gapped we highly recommend double checking the plug gap upon receiving them and adjusting to your vehicle's individual needs.
For the N55/S55, these plugs are 2 Steps Colder, while for the N54 they are 3 Steps Colder.

Note that BMW Spark plugs require a special 12 point 14mm thin walled socket. We have several options available in our catalog that will help you get your spark plugs changed. The BMW part number for the tool is 83300495560, but we recommend the Schwaben brand T#373727 that won't cost you an arm and a leg.

Brisk Silver Racing Spark Plugs are the best solution for high performance and racing engines. Silver Spark Plugs provide many unique and beneficial characteristics, Silver is taking spark plug technology to a whole new level, here are many reasons why our Brisk Silver Racing Spark Plugs are beneficial for your engines performance. Silver is the best conductor of any metal! It conducts 560% more electricity & 481% more heat than Platinum, and 276% more electricity & 177% more heat than Iridium.

Silver spark plug electrodes transfer electricity & heat better than any other spark plug material resulting in the most powerful spark! This is beneficial for a full complete combustion of the available fuel and air in the combustion chamber, combustion efficiency creates horsepower gains.

Key Benefits and Applications of Brisk Silver Racing Spark Plugs:

Silver is the best Electric and Heat Conductor - the best material for performance and racing spark plugs
Superior Ignition Ability Increases Engine Power Lower Required Supplied Ignition Voltage
Good Resistance to Fouling and Easier Starts
Race Engines and Engines with Hard to Ignite Fuels
Supercharged / Turbocharged / Nitrous engines
Excellent for Total Loss Ignition Systems
Excellent Spark Plug Choice for any Vehicle, Stock or Modified, even for High Mileage Vehicles and Vehicles With Oil Consumption Problems
Spark Plug Specs:

12mm thread
1.05"(26.1mm) reach
14mm Bi-Hex
gasket seat
non-projection tip
resistor
Silver center el.
cut-back ground electrode
* Replacement for NGK SILZKBR9F8S (BMW# 12120042724)
* One heat range colder than NGK 97506 SILZKBR8D8S

When it comes time to change your spark plugs, you may wonder about colder stepped spark plugs as many others have. Colder spark plugs work by pulling more heat out of the engine's cylinders (making them "colder") and dissipating it into the engine's head, which is then cooled by the cooling system. Depending on how you have your engine built, these could be a great addition! Colder plugs can help prevent engine knock and prevent the tip of the spark plug from melting or misfiring.

There are two rules that most people tend to go by when deciding on which spark plugs to buy:

The first rule of thumb is that with every 100 horsepower added, you should run spark plugs that are a step colder than your stock plugs. This is generally accepted across the motorsports community but unfortunately isn't always the most accurate measurement of when you will need colder plugs.
The second rule is to go a step colder any time you massively alter cylinder temperatures by adding forced induction to an NA engine, by increasing compression ratio, after altering timing in a major way, or by changing fuel types to something with a higher octane rating such as racing fuel.
Adding spark plugs that are a step colder outside of these conditions, with no real change to the engine, can actually hurt more than help by leading to spark plugs fouling quicker than normal and by making the car harder to start in cold weather conditions.

If your car won't turn over, there is a good chance your starter is shot. Bosch's OEM starter is a high quality replacement that will give you peace of mind thanks to its long life-span. OEM replacement for the original BMW part # 12411312104 and 12411312130. This is a NEW, not used, component with no included core charge!

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!

We recommend replacing hardware when doing your starter, since the bolts are aluminum and threads become stretched: Genuine BMW aluminum starter hardware set 12410392577 

Used on a wide variety of models with the BMW N52, N54, and N55 engines, including: E9X, F01/02, F07/10, E8X, E70, E60/61, F25, F30, and Z4.

High performance ignition kit for your N54 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