BMW E81 E87 LCI E90 E91 120i 320i N43 Automatic Transmission Gearbox WARRANTY

The BMW E87 LCI E90 E91 120i 320i N43 Gearbox is a factory original automatic transmission from the BMW range, designed for Series 1 and 3 models with the N43 engine. This solution is for users seeking a proven, original design while maintaining the correct powertrain characteristics and comfortable, smooth gear changes.

Specifications and technical data

• SKU: 7630997
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7630997
• Substitutable numbers: 24007572455, 7572455, GA6HP19Z, 24007630997, 7630997, 24007572795, 7572795, 24007592522, 7592522, 24007576180, 7576180
• Gearbox type: Automatic
• Category: Automatic Transmission

Intended Use and Compatibility

This automatic gearbox is dedicated to popular BMW models: Series 1 E87 LCI 120i and Series 3 E90/E91 320i with the N43 engine. Using an original transmission from the same design family ensures the preservation of factory drive parameters, correct shift points, and the acceleration characteristics intended by the manufacturer.

Thanks to compliance with manufacturer designations and the presence of appropriate replacement numbers, the gearbox can be matched to a specific vehicle equipment version, minimizing the risk of installation and programming issues.

Construction and Operating Characteristics

The transmission belongs to the category of automatic gearboxes, meaning fully automated gear changes without the need for a clutch pedal. The design has been developed for everyday use, combining driving comfort with adequate dynamics under higher loads.

Automatic control selects gears based on engine load, speed, and the driver's style. In practice, this translates to:

• smooth starts and acceleration in city traffic,
• stable RPM maintenance during highway driving,
• efficient downshifts for overtaking.

Benefits of Using an Original BMW Automatic Gearbox

Using an original gearbox to replace a damaged or worn one restores proper powertrain operation without altering the vehicle's factory architecture. Key advantages include:

• factory matching for the N43 engine – maintaining correct shift points and control logic,
• consistency with vehicle electronics – the gearbox works with factory control units and safety systems,
• possibility of using existing wiring and accessories, simplifying installation.

For the user, this means predictable vehicle behavior, no unwanted jerks, and stable operation across a wide range of road conditions.

Condition, Verification, and Selection by OEM

The offered gearbox is used, which significantly reduces repair costs compared to a brand-new component, while retaining the original BMW design. Before installation, a standard service procedure is recommended: leak check, mounting verification, and oil and filter change according to the vehicle manufacturer's recommendations.

It is advisable to base the selection of the appropriate gearbox on the OEM number and interchangeable part numbers assigned to the specific car version. A detailed discussion of selection principles, purchase profitability, and common myths related to used components can be found in the guide: Why Buy Used Gearboxes and Engines – Facts Instead of Myths.

BMW Automatic Gearboxes – Related Offer

If you are also looking for other automatic transmissions for this brand, check out our category BMW Automatic Gearboxes, where you will find a wide selection of transmissions matched to various series and generations.

Summary

The BMW E87 LCI E90 E91 120i 320i N43 Gearbox is an original automatic transmission designed for specific Series 1 and 3 models, allowing for the restoration of proper drive operation while maintaining factory parameters. Choosing this solution is a technically justified way to repair or replace a damaged gearbox, preserving the driving comfort and predictable gear change characteristics typical of BMW cars.