BMW 1 E87 118d rear Differential Diff 2,47 ratio DIESEL 4 BOLTS 7556794 WARRANTY

BMW 1 E87 118d rear Differential Diff 2,47 ratio DIESEL 4 BOLTS with a 2.47 gear ratio is a factory drivetrain component designed for Diesel engine versions with a four-bolt mounting. This is a used, original part from the Differentials category, which ensures the maintenance of proper drivetrain characteristics and compatibility with the factory rear axle configuration.

Specifications and technical data

• SKU: 7556794
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7556794
• Substitutable numbers: 33107556794, 7556794, 33107542091, 7542091, 33107556795, 7556795, 33107542092, 7542092
• Location on the vehicle: Rear
• Fuel type: Diesel
• Category: Differentials

Purpose and function in the drivetrain

The presented differential is designed for installation on the rear axle of the BMW 1 Series E87 118d model with a diesel engine. It is responsible for distributing torque to the rear wheels and maintaining the correct gear ratio, which translates into predictable acceleration, stability at higher speeds, and proper interaction with the vehicle's electronics.

Selecting the appropriate gear ratio is crucial for driving characteristics – it affects engine RPM at a given speed, starting dynamics, and comfort on long journeys. Using a differential that is structurally compatible with the 118d version allows you to avoid issues with drivetrain mismatch, controller errors, or improper operation of assistance systems.

Construction, mounting, and compatibility

The differential uses a four-bolt mounting, which is an essential parameter when selecting it for a specific suspension and driveshaft configuration. Its rear placement in the vehicle and design for a Diesel unit make it a component optimized for the higher torque typical of diesel engines.

Its original BMW origin ensures the retention of factory mounting points, geometry, and compatibility with other drivetrain components. As a result, the differential can be used both as a replacement part after a failure and as part of a post-accident repair, without the need for structural modifications.

Benefits of using an original used differential

Using a used OEM differential in a BMW 1 E87 118d is a reasonable compromise between cost and maintaining factory driving parameters. You receive:

• compatibility with the factory rear axle gear ratio,
• a perfect fit for the Diesel version drivetrain,
• original BMW construction, without aftermarket parts with uncertain tolerances,
• the ability to restore proper drivetrain operation after damage to the axle or final drive.

A used component allows for reduced repair costs while maintaining parameters close to factory specifications, which is particularly important in vehicles where drivetrain consistency and predictable road behavior are essential.

Gear ratio selection and technical support

Before purchasing, it is worth verifying the compatibility of the gear ratio and mounting type with the differential currently installed in your BMW 1 E87 118d. Both catalog data and comparing the axle construction based on service documentation or manufacturer markings are helpful here.

If you want to better understand how the differential ratio affects driving characteristics, fuel consumption, and engine operation, check out our guide: Dismantled drive axles and differentials – how to choose ratios for your driving style. You will find practical tips on selecting an axle and differential, configuration examples, and answers to frequently asked questions.

Expanding your BMW drivetrain repair

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 additional differentials, drive axles, or related transmissions, check out the available parts in the BMW Differentials category.