BMW E81 E87 130i Z4 E85 3.0si N52 N52N Manual 6 Speed Gearbox GS6-37BZ WARRANTY

Listing details

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

BMW E81 E87 130i Z4 E85 3.0si N52 N52N Manual 6 Speed Gearbox GS6-37BZ WARRANTY is an original, factory-spec gearbox from the Manual transmissions group, designed for BMW N52/N52N petrol engines. It is the ideal solution for users who expect precise gear shifting, the preservation of original drivetrain characteristics, and full compatibility with the factory powertrain architecture.

Specifications and technical data

• SKU: 7565178
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7565178
• Substitutable numbers: 7565178, 23007565178, 7565855, 23007565855, 7545319, 23007545319, 7562723, 23007562723
• Fuel type: Petrol
• Gearbox type: Manual
• Category: Manual Transmission

Purpose and compatibility

The presented GS6-37BZ manual gearbox has been designed to work with N52 and N52N petrol engines in BMW 1 Series E81/E87 130i models and the Z4 E85 3.0si roadster. By maintaining the original transmission design, the drivetrain retains factory shift points, acceleration characteristics, and predictable vehicle behavior across the entire RPM range.

The manual transmission type allows for direct control over gear ratios, which is particularly valued in dynamically driven 130i and Z4 3.0si units. Using an original gearbox from the same design family minimizes the risk of issues with fitment, mounting, and compatibility with engine peripherals and control systems.

Technical characteristics of the GS6-37BZ manual gearbox

The gearbox belongs to the BMW Manual transmissions family, which means it features a classic, mechanical design with manual gear shifting. Using a manual transmission in combination with a petrol engine ensures direct throttle response, linear power delivery, and the ability to precisely select gears according to driving style – from daily commuting to more dynamic utilization of the N52/N52N engine's potential.

The original OEM design guarantees compatibility with factory mounting points, drivetrain geometry, and standard accompanying components such as the clutch, driveshaft, or mounts. As a result, the gearbox can be used both as a replacement part following a failure and as part of a planned drivetrain upgrade within the same model platform.

Practical application and benefits of installation

Installing this gearbox in a BMW E81/E87 130i or Z4 E85 3.0si allows for the restoration of proper drivetrain operation in the event of wear or damage to the previous transmission. The manual gearbox type helps maintain the sporty character of the 130i and Z4 models, providing the driver with direct control over gear selection and better feedback from the drivetrain.

Choosing an original, used gearbox from dismantling is often a more predictable solution than rebuilding random transmissions, as structural consistency with the specific engine and body family is maintained. This translates into stable operation, correct interaction with the vehicle's electronics, and a reduction in the risk of additional installation modifications.

Condition, origin, and installation aspects

The offered gearbox comes from dismantling and is a used original BMW component. This type of part is particularly attractive to users who want to maintain the vehicle's factory specifications, avoiding unreliable aftermarket alternatives of unknown material quality and manufacturing tolerances.

During installation, standard service procedures are recommended: checking accompanying components (clutch, slave cylinder, mounting bushings), changing the transmission oil according to the manufacturer's recommendations, and verifying the tightness of connections. A properly performed installation allows you to fully utilize the potential of this gearbox in daily use as well as during more demanding driving.

Technical support and additional materials

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.

Before deciding to replace the transmission, it is worth familiarizing yourself with typical symptoms of failure and comparing the costs of rebuilding versus purchasing an original used gearbox. A detailed discussion of these issues can be found in the article: Manual transmission failures in cars – why is an original used part a more sensible choice than rebuilding?.