BMW Z4 Series E85 Roadster 2.5i M54 Manual 5 Speed Gearbox S5D250G - WARRANTY

BMW Z4 Series E85 Roadster 2.5i M54 Manual 5 Speed Gearbox S5D250G - WARRANTY is an original, used manual transmission from the BMW range, designed to work with the M54 engine in the Z4 E85 model. It provides a solid foundation for professional drivetrain repair, ensuring factory fitment, predictable performance, and consistency with the vehicle's design. By maintaining the manufacturer's specifications, this gearbox allows for the restoration of proper drivetrain parameters without compromising on compatibility.

Specifications and technical data

• SKU: 7526436
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7526436
• Substitutable numbers: 23007526436, 7526436
• Gearbox type: Manual
• Category: Manual Transmission

Technical characteristics and intended use

The presented gearbox belongs to the Manual transmissions category and was designed as a component of the BMW Z4 E85 drivetrain with the 2.5 M54 unit. The manual transmission type used provides a direct, mechanical connection to the drivetrain, which translates into precise gear control and predictable response to gear changes.

The S5D250G designation identifies a specific family of transmissions used by BMW in rear-wheel-drive models, optimized for the torque characteristics of the M54 engine. This ensures that the correct gear ratios are maintained, which is important for both driving dynamics and fuel economy.

Benefits of using an original BMW manual gearbox

Using an original manual gearbox in a BMW Z4 E85 offers a number of practical benefits:

• Factory fitment – compatibility with the mounts, driveshaft, clutch, and accessories characteristic of the Z4 E85 with the M54 engine.
• Consistent performance – maintaining the gear ratios and torque transfer characteristics intended by the manufacturer.
• Stable vehicle handling – proper alignment with the drivetrain reduces unwanted vibrations and improves the refinement of the drive system.
• Reasonable repair cost – a used manual gearbox often allows you to avoid costly, multi-stage refurbishment.

For users who value classic, mechanical gear shifting, such a transmission is a technically consistent solution that helps maintain the original driving character of the BMW Z4.

Professional use in repairs and swaps

The S5D250G gearbox is suitable both for standard replacement of a damaged transmission and for more advanced service projects. Thanks to the preservation of the original BMW design, it is particularly useful in situations where the priority is:

• maintaining compliance with factory service documentation,
• minimizing installation modifications,
• preserving the stock drivetrain performance characteristics.

This approach is valued by both specialized workshops and informed users who want to avoid unforeseen problems resulting from the installation of unsuitable replacements.

Condition, verification, and part selection

The item comes from the used BMW components segment, which allows for combining a favorable purchase cost with the preservation of the original manufacturer's specifications. Before installation, a standard workshop procedure is recommended: checking for leaks, play, mounting points, and preparing the appropriate transmission oil in accordance with BMW recommendations.

To make an informed decision between purchasing a used gearbox and refurbishment, it is worth familiarizing yourself with practical tips regarding symptoms of damage and service costs – these are discussed in detail in the article Manual transmission failures – when is an original used gearbox a reasonable choice.

BMW manual transmissions – drivetrain expansion and modernization

If you are planning a comprehensive repair or modernization of the drivetrain area in your BMW and need other components from the same group, such as other manual transmissions, housings, or related parts, check out the available parts in the BMW manual transmissions category.

Owners of older BMW generations, already treated as youngtimers, may also be interested in a guide showing how to consciously use the used parts market when refreshing a car – more information can be found in the material The second life of a youngtimer using used BMW parts.