BMW E93 Convertible 330d N57 Rear Differential Diff 2,93 Ratio 7572522 WARRANTY

Listing details

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

BMW E93 Convertible 330d N57 Rear Differential Diff 2,93 Ratio with a 2.93 gear ratio is a factory drivetrain component designed for installation on the rear axle of the 3 Series convertible model equipped with the N57 diesel engine. This solution is engineered to maintain the proper acceleration characteristics, torque transfer, and handling stability, ensuring consistency with the original BMW drivetrain configuration. By utilizing the original design from the Differentials category, compatibility with factory mounting points and suspension geometry is preserved.

Specifications and technical data

• SKU: 7572522
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7572522
• Substitutable numbers: 33107572523, 7572523, 33107572522, 7572522
• Location on the vehicle: Rear
• Category: Differentials

Purpose and function in the drivetrain

The offered rear differential is dedicated for installation in the rear section of the vehicle, within the drivetrain of the BMW 3 Series E93 Convertible with the N57 unit. It is responsible for distributing torque to the rear wheels and working in conjunction with the driveshaft and half-shafts, maintaining the correct 2.93 gear ratio, which affects acceleration characteristics, engine RPM at highway speeds, and the overall refinement of the drivetrain.

Selecting a differential with the correct gear ratio is crucial for:

• maintaining factory acceleration parameters and engine flexibility,
• stable operation of the automatic or manual transmission,
• proper functioning of assistance systems (e.g., traction and stability control),
• acoustic comfort at higher speeds.

Benefits of using an original BMW differential

Choosing an original differential from the BMW group allows you to maintain the integrity of the entire drivetrain without the need for modifications to mounts, half-shafts, or the driveshaft. The design is matched to the E93 rear suspension geometry, which facilitates installation and reduces the risk of incorrect joint operating angles.

The main advantages of using this component include:

• Factory fitment – compatibility with the original rear axle architecture and mounting points.
• Ratio consistency – maintaining the manufacturer-intended relationship between engine RPM and vehicle speed.
• Stable torque transfer – a design engineered for the high torque of the N57 unit.
• Seamless integration with the existing drivetrain and vehicle electronics.

Operational characteristics and installation

The differential is a component designed for installation on the rear axle, meaning it works with the rear subframe, suspension, and braking system in the rear area. Thanks to the retention of the original housing and mounting spacing, installation is possible in a near plug-and-play manner, using standard bolt-on points and stock accompanying components.

The product is sourced from dismantling, which in practice means:

• preservation of factory design and geometry,
• the possibility of cost-effective drivetrain repair,
• cost reduction compared to a new component while maintaining original specifications.

Gear ratio selection and vehicle configuration compatibility

The 2.93 ratio is a significant parameter when replacing a differential – it affects dynamics, fuel consumption, and interaction with drivetrain control software. Before purchasing, it is worth verifying the gear ratio compatibility with your vehicle's current configuration to avoid differences in driving characteristics or errors in assistance system operation.

If you want to better understand how the differential ratio affects vehicle behavior, selection for driving style, and compatibility with specific drivetrain versions, check out the article: Dismantled drive axles and differentials – how to choose ratios for your driving style. It is a practical discussion of issues related to drive axles and differentials, useful when planning repairs or modifications.

Selection support and repair expansion

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 parts, check the available parts in the BMW Differentials category.

In situations where original components are no longer available through the authorized service network, it is worth considering the use of verified parts from dismantling. You can find more on how to effectively repair older models using such parts in the guide: No parts at the dealership? How to handle repairs of older models using dismantled parts.