Manual Gearbox BMW E36 E38 E39 E46 M52 M54 5 Speed S5D 320Z 7503993 WARRANTY

Listing details

The gearboxes are sold with a 90-day warranty! They were tested before removal and are in full working order.

Manual Gearbox BMW E36 E38 E39 E46 M52 M54 5 Speed S5D 320Z is a precise manual transmission designed for BMW M52 and M54 petrol engines. The design of the S5D 320Z gearbox ensures direct torque transfer, a clearly defined gear lever feel, and predictable drivetrain behavior. It is a solution for drivers who expect mechanical control over gear changes and consistency with the character of classic BMW models.

Specifications and technical data

• SKU: 7503993
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7503993
• Substitutable numbers: 7503993, 23007503993, 1434306, 23001434306, 1434453, 23001434453, 1434305, 23001434305, 1222793, 23001222793, 1434572, 23001434572, 1222684, 23001222684, 1434485, 23001434485
• Fuel type: Petrol
• Gearbox type: Manual
• Category: Manual Transmission

Technical characteristics of the S5D 320Z gearbox

The S5D 320Z manual gearbox belongs to the BMW Manual Transmissions group, designed for dynamic driving and high durability. The transmission works with petrol units, which means gear ratios are appropriately matched to the characteristics of M52/M54 engines – providing flexibility in the mid-RPM range and stable performance at higher rotational speeds.

The manual solution allows for full control over gear selection, which is particularly important in cars used both in daily operation and in more demanding conditions, such as track driving or dynamic touring. The gearbox construction is optimized for efficient power transfer while maintaining predictable synchronizer operation.

Purpose and application in BMW models

The offered gearbox was developed for popular BMW E36, E38, E39, and E46 series models with M52 and M54 petrol engines. As a result, it serves as a cohesive element of the drivetrain, maintaining the factory handling characteristics of the car. Using the S5D 320Z transmission allows for the preservation of the original drivetrain operation, which is essential both for repairs and for maintaining the collector value of the vehicle.

Choosing this gearbox is particularly beneficial for users who want to maintain the original BMW drivetrain configuration without experimenting with unpredictable replacements. The manual design fits well with the character of the classic E36–E46 series, where precise, mechanical gear shifting is an important element of the driving experience.

Benefits of using an original manual gearbox

Using the S5D 320Z gearbox to replace a worn or damaged transmission allows you to restore proper drivetrain operation and reduce the risk of secondary damage to other components, such as the driveshaft or differential. A properly selected, original manual gearbox:

• ensures gear ratio consistency with the characteristics of M52/M54 petrol engines,
• maintains predictable car behavior across the full speed range,
• facilitates diagnostics and service due to compatibility with factory BMW solutions,
• helps preserve the mechanical gear lever "feeling" typical of the brand.

For many BMW users, it is crucial that the gearbox operates as close to the factory state as possible – without excessive play, unexpected delays, or ambiguous engagement. A properly selected manual transmission helps maintain drivetrain stability and vehicle comfort.

OEM selection and interchangeable numbers – how to buy consciously

When choosing a gearbox for a BMW, it is particularly important to verify compatibility using the OEM number and interchangeable numbers. This allows you to avoid problems with installation and fitment for a specific car configuration (engine, model year, body version). It is worth using manufacturer catalogs or professional VIN-based selection tools to ensure that the chosen transmission will work correctly with existing equipment.

If you want to deepen your knowledge about purchasing second-hand drivetrain components, VIN/OEM selection procedures, and the real cost differences between new and used parts, check out our guide Why it is worth buying used gearboxes and engines – facts instead of myths. It is a practical source of information that helps you make more informed purchasing decisions.

Expanding work on the BMW drivetrain

Replacing the gearbox is a good time to take a comprehensive approach to the condition of the entire drivetrain – from the clutch and control elements to mounts and supports. 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 manual transmissions, housings, or mounting elements, check the available parts in the BMW Manual Transmissions category.

Summary

Manual Gearbox BMW E36 E38 E39 E46 M52 M54 5 Speed S5D 320Z is a solution for users who want to maintain the original character of the drivetrain in classic BMW models with petrol engines. The manual design, tailored to the specifics of M52/M54 units, promotes precise gear shifting and predictable car handling. By choosing this transmission, you are investing in drivetrain consistency and the preservation of the typical BMW gearbox operation.