BMW 3 Series E36 Rear Differential Diff 4,44 Ratio 1428404 1428405 WARRANTY

BMW 3 Series E36 Rear Differential Diff 4,44 Ratio is an original BMW drivetrain component designed for rear axle installation. Thanks to its factory design, it ensures precise torque transfer and consistency with the handling characteristics typical of E36 models, making it an attractive choice for drivetrain repairs and modifications.

Specifications and technical data

• SKU: 1428405
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 1428405
• Substitutable numbers: 33101428405, 1428405, 33101428407 33101214876 33101212868, 33101213390 33101428404 33101428406, 33101214875 33101212867 33101213462, 1428407 1214876 1212868, 1213390 1428404 1428406, 1214875 1212867 1213462
• Location on the vehicle: Rear
• Category: Additional Differential Parts

Technical characteristics and intended use

The presented rear differential has been designed specifically for the BMW 3 Series E36 platform, taking into account suspension geometry and factory mounting points. The 4.44 ratio promotes dynamic acceleration, which is particularly noticeable in lower speed ranges and can be beneficial for both road use and track projects or amateur sports.

Its placement on the rear axle allows for the retention of the original drivetrain without the need for structural modifications to the body. The differential works with factory half-shafts and driveshafts of the appropriate E36 versions, which facilitates installation and reduces the risk of compatibility issues.

Benefits of using an original BMW differential

Using an original BMW differential instead of a worn or damaged component allows you to maintain the factory operating characteristics of the drivetrain. This solution is particularly important when you care about:

• maintaining predictable vehicle behavior during acceleration and engine braking,
• consistent operation with the stock gearbox and vehicle electronics,
• reducing unwanted vibrations and noise resulting from ill-fitting aftermarket replacements.

For projects focused on a livelier throttle response, the 4.44 ratio can provide a distinct boost in dynamics while maintaining a design consistent with BMW solutions.

Application in service and modifications

This rear differential will work well both as a repair component and as a base for drivetrain modifications in the BMW 3 Series E36. It can be used for:

• standard replacement of a worn differential in a daily-driven car,
• building a track or drift car where a shorter ratio is desired,
• reconstruction projects where maintaining original BMW design solutions is important.

Thanks to the retention of the factory mounting concept, the differential allows for relatively efficient replacement in workshop conditions, without the need for structural alterations.

Selection by OEM numbers and technical support

When selecting a differential for a specific version of the BMW 3 Series E36, it is crucial to verify compatibility using the OEM number and interchangeable part numbers. This helps avoid installation problems and ensures proper cooperation with other drivetrain components. In case of doubt, it is worth consulting the manufacturer's catalogs or decoding the equipment using the VIN.

If you want to better understand how to select used OEM parts by numbers and VIN, and how manufacturers design their powertrains, an article describing practices using another premium brand as an example may be helpful – The Audi five-cylinder engine – a legend from Quattro to RS3 and how to maintain it with original Audi parts.

Expanding work on the BMW drivetrain

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, housings, or mounts, check out the available parts in the category Other BMW differential parts.