The F-connector is located on the air intake boot and provides a connection point for the vacuum lines that run to the brake booster and fuel pressure regulator. The factory connector is made of plastic and with heat and exposure to the elements the connector becomes brittle and potentially cracks. As a result, a vacuum leak occurs which can cause poor idling issues, evap fault codes, and poor performance. 

This aluminum version from ECS Tuning is impervious to these issues, and will easy outlast the rest of your plastic and rubber vacuum system components. 

This item fits the following BMWs: 
E39 525i 530i 

E46 325i 325xi 330i 330xi

Z3 2.5i 3.0i
 

No more slow starts! Does your car feel old? Age may not be the issue at all, your throttle cable bushings are mostly likely worn out and your car has lost its pep!

Your throttle cable is the main connection you have from the gas pedal to the throttle body. Do you have hesitation or delayed pedal response? Think of when you are sitting at a stop light or making a turn into a flow of traffic, you may not realize it but if you haven't replaced your throttle cable and bushings this will require you to apply pressure to the gas pedal before getting feedback which can cause slow starts at stop lights and put you in danger when merging in traffic. These are not issues with old cars, they are issues related to your throttle response!

Symptoms to look for: lackluster/sloppy throttle actuation, deformed throttle cable appearance, and bushing condition. Your throttle cable bushings can be soft, cracked or even disintegrated by now.

Upgrade from failed rubber to new billet aluminum bushings for quick gas pedal response and a better engagement with your car.

Introducing the Turner Motorsport Bavarian Autosport Idle Control Valve for BMW M50, M52, and M54 engines. This crucial component, situated in the intake system, addresses common idle issues experienced by BMW owners. Enhance your BMW's performance and ensure smooth idling with this Idle Control Valve.

• Turner Motorsport's Bavarian Autosport Idle Control Valve for M50, M52, M54 engines.
• Targets and resolves common idle issues.
• Promotes smooth and consistent idling.
• Essential for maintaining optimal engine performance.
• Reliable component for BMW enthusiasts.

Upgrade your BMW's idle control system with the Turner Motorsport Bavarian Autosport Idle Control Valve, ensuring a seamless driving experience.

Silicone Coupler - Straight 3" ID (76.20mm) x 3" L

No matter the project, ECS Tuning silicone couplers and elbows offer a high-quality, precision-engineered solution to your needs. Whether you're installing an intercooler, fabricating a custom intake system, or whatever else you can dream up, ECS Tuning has you covered.

• High-quality silicone construction for durability
• Precision-engineered design ensures a perfect fit
• Versatile solution for various automotive projects
• Enhances performance and reliability
• Compatible with BMW and other vehicles

Ensure optimal engine performance with the replacement of your vacuum system hoses. The vacuum system plays a crucial role in the engine's functionality, transforming it into an efficient pump that influences air-fuel mixture and combustion. Damaged vacuum hoses can lead to various performance issues, from rough idle to difficulties starting the engine. If you're experiencing these issues, it's time to upgrade to this plastic hose with a 2.3mm inner diameter. The hose is black, arrives in an 8-foot section, and can be easily cut to the desired size for a perfect fit.

Key Features:

• Engine Optimization: Replacing old hoses ensures the vacuum system operates at peak performance.
• 2.3mm Inner Diameter: Designed to meet specific engine requirements.
• Black Color: Blends seamlessly with the engine components.
• 8-Foot Section: Provides flexibility to cut the hose to the required length.
• Easy Installation: Upgrade without hassle for improved engine efficiency.

Upgrade your vacuum system with this high-quality plastic hose, addressing performance issues and ensuring your engine runs smoothly.

The TMS E36/Z3 6cyl Intake Tube Plug is intended to be used in a variety of applications ranging from ASC delete, deleting the idle control valve in a car with a aftermarket engine management system, re-routing the PCV hose to a catch can, aftermarket supercharged engines, or simply plugging one of the hose provisions in the E36 6cyl intake tubes. It also works great as a coolant hose plug. The diameter of the tip is 20mm (just over 3/4"). A low profile Oetker compression clamp is included. The plug can be drilled and tapped for a small air temp/water temp sensor, pre throttle body vacuum/boost/MAP sensor barb, or water alcohol/nitrous/methanol injector or barb. Works with M50, M50TU S52, M52, S52 throttle boots and may work in other applications with a 20mm hose.

Installation Instructions / More Details

This intake tube plug can be used in a variety of ways on these BMWs:
1992-1995 E36 325i, 325is, 325ic
1996-1998 E36 328i, 328is, 328ic
1999-1999 E36 328is, 328ic
1995-1999 E36 M3 coupe, sedan & convertible
1997-1999 Z3 2.8 liter
1992-1995 M50 engine (2.5 liter)
1996-1999 M52 engine (2.8 liter)
1995-1995 S50 engine (3.0 liter / US engine)
1996-1999 S52 engine (3.2 liter / US engine)

For optimal performance, consider the 46.5mm To 61.0mm Silicone Coupler.

Engineered with durability and functionality in mind, this silicone coupler provides a reliable connection for various components in your vehicle's intake or cooling system. Its smooth interior surface promotes efficient airflow, while its flexible and reinforced construction ensures a secure fit and prevents leaks. Enjoy hassle-free installation and enhanced performance with this premium silicone coupler.

• Durable silicone construction
• Smooth interior surface for efficient airflow
• Flexible and reinforced design prevents leaks
• Secure fit for reliable performance
• Hassle-free installation

Boost airflow and unleash a deeper induction sound to rekindle the excitement of driving your BMW E39 525i.

The Luft-Technik Intake System from ECS Tuning is purpose-built for M52TU and M54-powered 525i / 528I models, offering a performance upgrade that overcomes the restrictive factory airbox while maintaining a precise, factory-like fit. ECS Tuning engineered this system around the unique mounting geometry of the E39 chassis, ensuring an effortless bolt-on installation that integrates seamlessly with OEM components.

This performance intake features a high-flow conical air filter housed in a powder-coated aluminum heat shield, designed to seal against the hood and make full use of the factory inlet ducting. By drawing in cooler outside air, the system helps reduce intake temperatures for denser combustion and improved efficiency. A reinforced silicone intake elbow and a precision-engineered MAF housing keep the stock sensor in its proper location while smoothing airflow and reducing turbulence.

The results are immediately noticeable: quicker throttle response, a throatier intake growl, and a cleaner, performance-focused look under the hood. Built with premium materials such as stainless-steel hardware and heat-resistant silicone, ECS Tuning’s Luft-Technik Intake delivers both durability and long-term performance.

For BMW E39 525i / 528I drivers who want OE-level fitment with the benefits of sharper response, enhanced induction noise, and improved airflow, the Luft-Technik Intake by ECS Tuning is a must-have upgrade.

Key features:

21% increase in flow over the stock intake
Seals to the hood for the largest and coldest air space.
Unrestricted air flow for maximum induction noise.
The heat shield is designed to fit the E39 chassis perfectly, utilizing factory mounting locations, and creates a colder air pocket where the factory inlet duct is.
5052 powder-coated aluminum heatshield, stiff, corrosion-resistant, and finished for a long life in the swap environment.
The black silicone intake elbow and coupler is a compliant, high-temperature silicone that grips clamps and resists blow-off during repeated fitment and heat cycles.
Retains factory MAF
Stainless-steel hardware for longevity and corrosion resistance.
Fitment & compatibility:

Specifically engineered to work with utilizing that maximum air space and retaining the OEM cold air inlet. Mounts to the factory frame rail, no modification required.

Tailored to the M54B25 found in the 5-series chassis.

Kit Contents:

Heat Shield
Silicone Throttle Body Boot
MAF Mount
Silicone MAF Coupler
Inlet/Air Filter Adapter
Hi-flow ECS Conical Air Filter
E39 Specific Heat Shield Mount
Hardware for installation
Product Development: The Luft-Technik Intake System was designed, engineered, tested, and quality inspected by ECS Tuning's Research and Development team. Their process incorporates industry-leading tools and methods, including FARO laser scanning for reverse engineering and quality assurance, SolidWorks 3D CAD modeling, in-house 3D printing for rapid prototyping, and rigorous long-term product testing. Performance data is validated using both a Mustang AWD 500 SE in-ground dyno and a Superflow SF-750 Flowbench to ensure precision and reliability.

Installation and support: - Click HERE for Installation Instructions -

ECS Silicone Coupler

Upgrade your BMW with the ECS Silicone Coupler. This straight 3 5/8" ID (92mm) x 3" L coupler is designed to enhance your vehicle's performance and durability. Crafted from high-quality silicone, it ensures long-lasting reliability and superior performance.

• Enhances vehicle performance
• Durable construction for long-lasting reliability
• Specifically designed for BMW vehicles

Includes connector housing with terminals and seals. Commonly used for the idle air control valve (IACV).

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# 12521706096 - Commonly used for the idle air control valve (IACV).

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