BMW E90 E91 E92 335i N54 N55 Rear Differential Diff 3,08 Ratio 7571186 WARRANTY

Listing details

The differential is sold with a 90-day warranty! It was tested before removal and is in full working order.

BMW E90 E91 E92 335i N54 N55 Rear Differential Diff 3,08 Ratio is an original drivetrain component from the Differentials category, designed for rear axle installation. This solution is intended for users seeking precise torque transfer and stable vehicle handling, whether with stock or increased power output from the N54 engine.

Specifications and technical data

• SKU: 7571186-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7571186
• Substitutable numbers: 7571186, 33107571186, 7561228, 33107561228, 7561227, 33107561227, 7571187, 33107571187
• Location on the vehicle: Rear
• Category: Differentials

Purpose and function in the drivetrain

This rear differential is dedicated to BMW 3 Series E90 and E91 models equipped with the N54 335i engine. It is responsible for distributing power to the rear wheels, influencing acceleration characteristics, high-speed vehicle behavior, and stability during dynamic maneuvers.

The 3.08 gear ratio provides a balanced compromise between flexibility in lower gears and highway driving comfort, which is particularly important for the powerful, turbocharged gasoline engines used in the 335i.

Construction and performance parameters

The differential is mounted in the rear of the vehicle, working in conjunction with the driveshaft and rear half-shafts. The design was engineered by BMW to withstand the high loads characteristic of the N54 engine, ensuring it handles intensive use well, even in vehicles with power modifications.

The factory gear configuration allows for maintaining the stock drivetrain characteristics, which facilitates diagnostics, tuning, and subsequent maintenance. This is a particularly beneficial solution for users who want to restore their vehicle to proper technical condition without deviating from the original BMW concept.

Practical application and benefits of installation

Using this differential is suitable both for standard replacement of a worn-out unit and for post-accident repairs or rebuilding a vehicle after a drivetrain failure. Maintaining the correct gear ratio translates into:

• consistent operation with the stock transmission and vehicle electronics,
• predictable vehicle behavior in corners,
• stable engine RPM during high-speed driving.

This component from the Differentials category is crucial for the durability of the entire drivetrain, which is why choosing the right model for a specific engine and body version has a direct impact on driving comfort and safety.

Condition, origin, and fitment

The offered differential is a used part sourced from vehicle dismantling, allowing for economical repair while maintaining original BMW specifications. Such components are frequently chosen by workshops specializing in the brand, as they ensure factory fitment to mounts, half-shafts, and the driveshaft without the need for modifications.

Before installation, a standard workshop procedure is recommended: checking for leaks, backlash, and the condition of the gear oil to fully utilize the part's potential and minimize the risk of future service interventions.

Gear ratio selection and technical knowledge

Proper selection of a differential for your driving style and drivetrain configuration is significant for the driving experience. If you want to better understand the relationship between the final drive ratio, acceleration characteristics, and engine RPM, check out the article: Dismantled drive axles and differentials – how to choose gear ratios for your driving style.

If you are planning a comprehensive repair or upgrade of the drivetrain area in your BMW and need other components from the same group, such as other axles, differentials, or complete drivetrain assemblies, check out the available parts in the BMW Differentials category.