Audi S4 B7 4.2 BBK Quattro Automatic Gearbox Transmision JTR 09L300040S WARRANTY

Listing details

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

Audi S4 B7 4.2 BBK Quattro Automatic Gearbox Transmision JTR 09L300040S WARRANTY is a factory-original, used transmission from the Audi automatic transmissions range, designed for the 4.2 BBK petrol engine with quattro all-wheel drive. This is the ideal solution for users who expect to maintain the original drivetrain characteristics, smooth gear shifts, and proper integration with the vehicle's electronics.

Specifications and technical data

• SKU: 09L300040S
• Mark: Audi
• Condition: Used
• OEM Part Number: 09L300040S
• Substitutable numbers: 09L300040S, 09L 300 040 S
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: Automatic Transmission

Purpose and compatibility

The presented automatic transmission is dedicated to the Audi S4 B7 generation model with the 4.2 BBK petrol unit and quattro all-wheel drive. The transmission design was engineered for the specific torque parameters and characteristics of the V8 engine, allowing for the maintenance of proper dynamics, predictable throttle response, and consistency with factory engine and drivetrain control unit settings.

Technical characteristics of the automatic transmission

This is an automatic transmission that ensures comfortable, smooth gear shifting in city traffic and stable power delivery under higher loads. Using an automatic transmission in this Audi model allows for:

• reduction of jerking during gear changes,
• optimal utilization of the petrol engine's RPM range,
• consistent cooperation with the quattro drivetrain system,
• preservation of factory acceleration characteristics.

Thanks to its matching with the V8 petrol unit, the transmission is prepared to operate under the higher thermal and mechanical loads typical for this drivetrain variant.

Practical application and benefits of installation

Installing this transmission in an Audi S4 B7 4.2 BBK Quattro allows for restoring proper drivetrain operation in the event of a failure of the previous unit. A used, original automatic transmission is a solution that in many cases:

• shortens repair time compared to a full overhaul of the old unit,
• allows for maintaining compatibility with factory controller software,
• minimizes the risk of issues with fitting accessories and electrical harnesses,
• maintains the original driving feel characteristic of the S4 B7.

For workshops specializing in the Audi brand, this is a component that can be integrated into the standard automatic transmission replacement procedure without the need for structural modifications.

Condition and installation aspects

The offered transmission comes from the secondary market and is marked as a used product, which allows for optimizing repair costs while maintaining the manufacturer's original specifications. Before installation, a standard service procedure is recommended, including, among other things, checking seals, changing ATF oil according to manufacturer recommendations, and verifying compatibility with the existing transmission controller in the vehicle.

Drivetrain expansion and technical knowledge

If you are planning a comprehensive repair or upgrade of the drivetrain area in your Audi and need other components from the same group, such as a torque converter, control elements, or additional transmission sub-assemblies, check the available parts in the Audi automatic transmissions category.

For users and workshops who want to better understand the differences between manual transmissions, classic automatics, and DSG gearboxes, as well as learn about typical faults and best practices when purchasing components from the secondary market, the following guide will be helpful: Transmission: manual, automatic, or DSG – typical faults and a guide to buying a used gearbox.

In the context of the growing importance of original components from the secondary market, especially in the premium car segment, it is also worth reading the trend analysis described in the article Crisis in the new parts market? Why used originals for premium cars are the hottest trend in 2026, which allows for a better assessment of the cost-effectiveness of installing a used automatic transmission in an Audi S4 B7.