BMW E87 E90 E91 Oil Return Pipe 118i 318i N46 7525287

BMW E87 E90 E91 118i 318i N46 Oil Pipe is an original lubrication system component designed for selected 1 and 3 Series models with the N46 engine. Thanks to its factory geometry and precise fit for the specific engine unit, it ensures stable oil flow and proper engine operation. This is a practical solution for users looking for a proven BMW OEM component instead of aftermarket alternatives with uncertain parameters.

Specifications and technical data

• SKU: 7525287
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7525287
• Substitutable numbers: 7525287, 11437525287
• Category: Other Engine Parts

Purpose and Role in the Lubrication System

The oil pipe in the N46 engine is responsible for the controlled delivery of oil to selected components of the powertrain. Proper lubricant flow is crucial for:

• maintaining adequate oil pressure in the circuit,
• reducing friction between moving parts,
• minimizing the risk of component overheating,
• stable engine operation across the entire RPM range.

Choosing a pipe dedicated to specific versions of BMW 1 Series (E87) and 3 Series (E90, E91) with the N46 engine ensures compliance with the factory lubrication system design.

Advantages of Using an Original BMW Oil Pipe

Using an original oil pipe to replace a worn component or an unreliable aftermarket part offers a range of operational benefits:

• guaranteed fit for the N46 engine without the need for modifications,
• preservation of the factory oil routing,
• reduced risk of leaks at connections,
• better compatibility with existing mounting points and accessories.

This allows the pipe to be used for both standard repairs and comprehensive powertrain servicing where consistency of all lubrication system components is important.

Component Condition and Service Application

The offered oil pipe is a used part from disassembly and is intended for users seeking a functional component at a reasonable price. This type of part is ideal for:

• routine repairs of N46 engines in BMW E87, E90, E91,
• restoring the original engine configuration after previous modifications,
• preventive maintenance when the existing pipe shows signs of wear or leaks.

Choosing a used OEM part helps maintain the factory lubrication system operating characteristics, which is particularly important for engines used daily.

Integration with Other Components and Part Selection

The oil pipe works in conjunction with other lubrication system components, such as the oil pump, engine block channels, and filtration elements. When selecting parts, it is important to consider:

• compatibility with the specific body generation (E87, E90, E91),
• the presence of the N46 engine in the specific vehicle instance,
• the condition of other lubrication system components.

This approach facilitates a cohesive repair of the oil system, leading to a longer powertrain lifespan and stable operating parameters.

BMW "Other" Category – Selecting Additional Components

If, during the servicing of your N46 engine, you also need other components from the Other category dedicated to this brand, check the availability of products such as brackets, covers, or additional pipes in the BMW Other section. This will make it easier to gather all the small components needed during a single workshop visit.

Expert Support and Technical Knowledge Development

When planning repairs and upgrades, it is beneficial to expand your knowledge about the structural differences between various engine versions and models. A comparative analysis of sports variants and standard engine versions can be helpful – you can find it in the article Audi RS vs. Other Models – What Lies Under the Hood and Chassis?, which discusses, among other things, the impact of changes in the engine, brakes, and chassis on the selection of appropriate parts.