BMW Z4 E85 2.0i N46 E90 320si N45 Manual 6 Speed Gearbox GS6-17BG WARRANTY

Listing details

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

BMW Z4 E85 2.0i N46 E90 320si N45 Manual 6 Speed Gearbox GS6-17BG WARRANTY is a precise manual transmission designed to work with the N45 petrol engine in the sporty 320si version. It offers direct, mechanical gear shifting, valued by drivers who expect better control over the car and predictable drivetrain performance. Thanks to the design typical of BMW manual transmissions, it provides a solid foundation for repairing or restoring factory driving characteristics.

Specifications and technical data

• SKU: 7629518
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7629518
• Substitutable numbers: 23007629518, 7629518, 23007570574, 7570574, 23007564149, 7564149, 23007575050, 7575050, 23007545051, 7545051, 23007565906, 7565906, 23007559139, 7559139
• Fuel type: Petrol
• Gearbox type: Manual
• Category: Manual Transmission

Purpose and technical specifications

The presented gearbox belongs to the BMW manual transmissions group and is structurally matched to the N45 petrol unit in the E90 320si model. The manual transmission type ensures a rigid, mechanical connection to the drivetrain, which translates into clear vehicle behavior during acceleration, engine braking, and dynamic driving.

The system was developed with the 3 Series sports sedan in mind, which is why the shifter kinematics, gear ratios, and operating characteristics are oriented towards precision and repeatability of gear changes. The manual design reduces electronic complexity compared to automatic transmissions, which facilitates diagnostics and service.

Application in BMW E90 320si N45

The gearbox is dedicated to working with the N45 petrol engine in the 320si model, which means compatibility with factory mounting points, drivetrain geometry, and the torque characteristics of this unit. Such a match allows for maintaining the original balance between performance, fuel consumption, and driving comfort.

In practice, this means that with proper installation, you can recreate the stock driving experience – without the need to adapt components from other engine versions. For users who want to keep the car in a configuration close to factory, this is a solution consistent with the manufacturer's design.

Benefits of choosing a BMW manual gearbox

A manual transmission in this model is the preferred solution for drivers who value direct influence on the drivetrain's operation. The most important advantages include:

• greater control over the gear shift point and engine RPM,
• simpler construction compared to automatics and dual-clutch transmissions,
• easier maintenance and availability of specialists familiar with this design,
• consistency with the character of the sporty 320si version.

For users considering the purchase of a used transmission, it is also important to be able to verify the mechanical condition and compatibility with a specific vehicle configuration, which in the case of this gearbox is well-documented in the BMW service environment.

Condition, origin, and installation aspects

The offered gearbox comes from the BMW used parts segment, which allows combining a reasonable purchase cost with maintaining the manufacturer's original design. For workshops and individual users, this means the possibility of carrying out repairs or replacements based on a component consistent with factory specifications, without the need to use replacements of uncertain quality.

Before installation, a standard workshop procedure is recommended: checking for leaks, verifying input and output play, assessing the operation of the shifter mechanism, and changing the transmission oil in accordance with service recommendations for the given model. Such an approach increases the chance of long-term, stable operation of the drivetrain.

Technical support and additional materials

For users who want to better understand the differences between transmissions and take a conscious approach to buying a used gearbox, the following guide will be helpful: Gearbox: manual, automatic or DSG – typical faults and a guide to buying a used transmission. The article discusses the characteristics of different types of transmissions, typical signs of wear, and practical tips on verifying the condition before installation.

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 housings, shifter mechanisms, or mounting elements, check the available parts in the BMW manual transmissions category.