BMW E87 120i N46 Differential Diff 3,38 Ratio 7539776 RECONDITIONED

BMW E87 120i N46 Differential Rear Axle 3.38 RECONDITIONED is a professionally refurbished rear axle assembly designed for the rear axle of BMW 1 Series E87 models with an N46 engine. The controlled refurbishment process ensures stable drivetrain operation, correct torque transfer, and smooth, predictable driving characteristics.

Specifications and technical data

• SKU: 7539775-1
• Mark: BMW (Genuine OE)
• Condition: Remanufactured
• OEM Part Number: 7539775
• Substitutable numbers: 33107539776, 7539776, 33107539775, 7539775
• Location on the vehicle: Rear
• Category: Additional Differential Parts

Purpose and Fitment for BMW E87 120i

The offered differential belongs to the category of Other Differential Parts and is a component of the drivetrain mounted on the rear axle. The design has been developed for the specific requirements of the BMW 1 Series E87 with the N46 unit, which translates to the correct gear ratio, proper cooperation with the drive shafts, and consistency with the factory driving characteristics.

By adhering to manufacturer standards and using an original BMW base, the differential ensures:

• correct power transfer to the rear wheels,
• stable vehicle behavior during acceleration and engine braking,
• compatibility with factory traction and stability control systems.

Refurbishment and Quality Control

The differential is offered in a remanufactured (refurbished) state, meaning it has undergone a renewal process while adhering to strict procedures. The refurbishment typically involves verifying the wear of internal components, the condition of the housing, and the correct operation of the differential mechanism, followed by restoring performance parameters to meet manufacturer specifications.

This method of preparing the component allows for:

• repeatable, predictable operation of the differential mechanism,
• reduced risk of noises and vibrations originating from the rear axle,
• a reasonable compromise between cost and durability compared to a new part.

Vehicle Placement and Installation Aspects

The differential is designed for installation on the rear axle, serving as the central element of the rear drivetrain. Its appropriate placement on the vehicle facilitates the mechanic's work – mounting points and housing geometry are consistent with factory BMW solutions, promoting installation without structural modifications.

When replacing the differential, it is advisable to pay attention to:

• the condition of the rear axle suspension mounts and bushings,
• the sealing of connections with the driveshaft and drive shafts,
• proper venting and filling with oil according to the vehicle manufacturer's recommendations.

Benefits of Using a Refurbished BMW Differential

Using a refurbished differential in a BMW E87 120i allows for the restoration of correct drivetrain operation while maintaining reasonable service costs. The construction, based on an original BMW unit, ensures proper fitment with other drivetrain components and preserves the characteristic handling of this model.

For users considering the choice between a refurbished OEM part and an aftermarket replacement, an article describing practical criteria for selecting used drivetrain components may be helpful – especially in terms of workmanship quality and durability. To this end, it is worth reading the material: 5 Reasons Why a Used OEM Part is a Better Choice Than an Aftermarket Replacement.

Other BMW Differential Parts and OEM Selection

If you are also looking for other components in the Other BMW Differential Parts category, check the available assortment in our section: Other BMW Differential Parts. There you will find compatible drivetrain components that will allow for a comprehensive approach to rear axle servicing.

When selecting drivetrain components, good practices for searching for parts by OEM numbers and VIN are also helpful. These principles – although described using another brand as an example – are discussed in detail in the article: The Five-Cylinder Audi Engine – A Legend from Quattro to RS3 and How to Select Used OEM by VIN/OEM. The tips provided there can be successfully applied when selecting components for BMW as well.