BMW E90 E91 E92 LCI N47N Transmission Oil Cooler Line Pipe 8511455

BMW E90 E91 N47N Transmission Oil Lines are original components of the automatic transmission lubrication system, designed for specific versions of the 3 Series with the N47N engine. A used BMW component allows for the preservation of the gearbox's factory operating characteristics and proper oil circulation, which is crucial for the durability of its parts. This is a solution for users seeking parts with a proven design and perfect fit for the factory system.

Specifications and technical data

• SKU: 8511455
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8511455
• Substitutable numbers: 17228511455, 8511455
• Category: Other Transmission & Drivetrain

Purpose and Function of BMW Transmission Oil Lines

Transmission oil lines in BMW E90 and E91 models with the N47N unit are responsible for transporting transmission fluid between the gearbox and the cooling system components. The correct flow of the working medium influences:

• stable operating temperature of the automatic transmission,
• maintenance of proper oil pressure in the circuit,
• reduction of wear on internal gearbox components,
• limiting the risk of overheating during driving in demanding conditions.

By maintaining the original geometry of the lines, the gearbox lubrication and cooling system operates according to the manufacturer's specifications, which translates to stable transmission performance in the long term.

Construction and Fit for BMW E90 / E91 N47N

The offered transmission oil lines have been specifically designed for the E90/E91 body architecture and the N47N engine powertrain. This means:

• factory routing of oil lines in the engine bay and undercarriage,
• appropriately selected diameters and connections for the stock gearbox,
• compatibility with factory mounting points and brackets,
• no need for modifications to the system when parts are selected correctly.

This precise fit facilitates installation and allows for the preservation of the original powertrain configuration, which is important for both reliability and future serviceability.

Condition, Verification, and Service Application

This component comes from the Other category, yet it plays a vital role in the gearbox lubrication system. As a used part, it is primarily intended for:

• repairs after mechanical damage to the lines (cracks, abrasions),
• eliminating leaks in the transmission fluid circuit,
• restoring the original routing of oil lines after incorrect modifications.

Choosing an original line instead of an aftermarket alternative reduces the risk of problems with connection fitment and leaks at the joints, which directly impacts the trouble-free operation of the automatic transmission.

Benefits of Using Original BMW Transmission Oil Lines

Using transmission oil lines dedicated to the BMW E90/E91 N47N provides a range of practical benefits:

• maintaining lubrication system operating parameters in line with the manufacturer's design,
• secure fit to stock mounting points and the oil cooler,
• reducing the risk of transmission fluid leaks,
• easier diagnostics and future service.

For workshops and users, this means more predictable installation and less risk of additional work related to fitting components. As a result, the entire powertrain maintains structural consistency with the factory BMW configuration.

Related Products and Technical Knowledge

If you are looking for other components from the Other category dedicated to this brand, check out our offer for other BMW parts, where you will find a wide selection of components for various 3 Series models and beyond.

Want to better understand the design differences in sports car versions and their impact on component selection? Read the article on our blog: Audi RS vs. Other Models – What Lies Under the Hood and Chassis?, where we discuss, among other things, the importance of correctly selected lubrication, cooling, and chassis systems in high-performance cars.

For drivers planning more extensive service work on their car, the guide: Top 10 Most Frequently Replaced Parts in Your Car, containing practical tips on planning repairs and optimizing operating costs, may also be useful.