BMW F20 F21 LCI F22 F23 B58 Manual Gearbox Start/Stop GS645BZ 8609450 WARRANTY

Description

Listing details

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

BMW F20 F21 LCI F22 F23 B58 Manual Gearbox Start/Stop GS645BZ is an original, used manual gearbox designed for BMW models equipped with the B58 petrol engine. The 6-speed design ensures precise gear ratios, good dynamics, and predictable drivetrain behavior in both daily use and more demanding driving conditions.

Specifications and technical data

• SKU: 8609450
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8609450
• Substitutable numbers: 8609450, 23008609450, 2590212, 23002590212
• Fuel type: Petrol
• Gearbox type: Manual
• Part type: Manual Transmission
• Category: Manual Transmission

Purpose and compatibility

The presented gearbox belongs to the Manual gearboxes category and is structurally matched to the BMW F20, F21 LCI, F22, and F23 series with the B58 petrol unit. Using a manual transmission allows for full control over the drivetrain, which is particularly valued in cars with a more dynamic character.

The system is designed to work with factory BMW drivetrain components, which facilitates installation in place of a worn or damaged gearbox without the need for structural modifications to the vehicle.

Construction and operating characteristics

The 6-speed manual transmission provides a logical distribution of gear ratios, enabling efficient use of the petrol engine’s RPM range. The gear tuning promotes both calm driving with low fuel consumption and dynamic acceleration when the driver needs it.

The design solutions implemented by the BMW brand in this gearbox are focused on operational stability, predictable behavior under load, and good cooperation with the clutch system and axle drive. As a result, the gearbox performs well in daily use as well as during more intensive operation.

Application in the drivetrain

A manual gearbox combined with the B58 petrol engine allows the driver to precisely manage torque, which translates into better traction control and the ability to adapt driving characteristics to road conditions. This type of configuration is often chosen by users who prefer direct, mechanical feedback from the drivetrain.

Replacing a worn transmission with the presented model allows for restoring the proper operation of the drivetrain, reducing unwanted noise, and improving gear shifting quality. This is a particularly beneficial solution for vehicles used intensively or with higher mileage, where the condition of the gearbox has a direct impact on driving comfort and safety.

Condition, origin, and benefits of purchase

The offered gearbox comes from dismantling and is a used part, which allows for a significant reduction in repair costs compared to purchasing a new transmission while maintaining the original BMW design. For many users, this is a reasonable compromise between financial expenditure and maintaining the vehicle’s original specifications.

If you want to better understand how to safely select drivetrain components from the secondary market, procedures for selection by OEM numbers, and real cost differences, it is worth reading our expert guide: Why it is worth buying used gearboxes and engines – facts instead of myths. This is a practical supplement to your knowledge when planning drivetrain repairs.

Further upgrades within the transmission area

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, selectors, or mounting elements, check out the available parts in the BMW manual gearboxes category.