VW Golf 8 1.5 eTSI Engine DFYA Mild Hybrid Lithium Batery 48V 596Wh 5WA915107B

VW Golf 8 1.5 eTSI Engine DFYA Mild Hybrid Lithium Batery 48V 596Wh is an original Volkswagen mild-hybrid system component designed for use with the 1.5 eTSI unit. This specialized 48V lithium battery, integrated into the mild-hybrid system, provides stable power for energy recovery and drive assistance systems, improving engine refinement and vehicle energy efficiency. Thanks to its factory design, it is a precisely matched component for modern electrification solutions in the Golf 8.

Specifications and technical data

• SKU: 5WA915107B
• Mark: Volkswagen
• Condition: Used
• OEM Part Number: 5WA915107B
• Substitutable numbers: 5WA915107B, 5WA 915 107 B
• Category: Battery & BMS Units

Purpose and role in the mild-hybrid system

The presented 48V lithium-ion battery acts as a key element of the mild-hybrid system in the VW Golf 8 with the 1.5 eTSI DFYA engine. It is responsible for powering the 48V high-voltage installation, working with the starter-generator, and supporting functions such as energy recuperation during braking or electric assistance during acceleration. As a result, the drivetrain can operate more smoothly, and the internal combustion engine is relieved during critical load moments.

The battery in this configuration has been designed specifically for the requirements of the VW platform, which translates into correct operating parameters, appropriate charging and discharging characteristics, and compatibility with the factory BMS control. This solution allows for maintaining the consistency of the entire electrical system and avoiding communication issues within the vehicle network.

Technical category: Electric vehicle batteries and BMS

The product belongs to the Electric vehicle batteries and BMS category, which means it is a specialized component intended for use in advanced energy management systems. In such systems, the following are crucial:

• stable operating voltage across a wide range of loads,
• cooperation with the electronic battery management system (BMS),
• resistance to frequent charge and discharge cycles in urban driving conditions,
• maintenance of appropriate parameters at varying operating temperatures.

Thanks to its factory fitment for the Volkswagen platform, this battery works with the original control software, which reduces the risk of diagnostic errors and ensures predictable behavior of the entire drivetrain.

Benefits of using an original 48V battery

Using an original 48V lithium battery in the Golf 8 1.5 eTSI provides a number of practical operational benefits:

• Consistency with the factory electrical architecture – maintaining correct communication with control modules and the BMS system.
• Appropriate operating characteristics in mild-hybrid mode – proper support for start-stop, recuperation, and electric assistance functions.
• Better voltage stability compared to universal solutions, which reduces the risk of interference in the vehicle's electronics.
• The ability to effectively utilize the potential of the 48V system without the need for installation modifications.

In the case of modern hybrid systems, it is particularly important that the battery complies with the manufacturer's design specifications. A properly selected component helps maintain predictable fuel consumption, dynamics, and driving comfort parameters.

Characteristics of the used product

The offered battery is in used condition, which allows for an economical restoration of the mild-hybrid system's efficiency while maintaining the original manufacturer's specifications. This type of solution is particularly attractive for post-warranty vehicle repairs, where a reasonable balance between cost and functionality is important. The used OEM component retains factory mounting and electrical fitment, which facilitates service and shortens replacement time.

Before installation, a standard diagnostic procedure on the vehicle is recommended, including checking communication with the BMS system and verifying operating parameters during a test drive. This allows for confirming the correct integration of the battery with the existing installation and avoiding irregularities in the operation of the mild-hybrid system.

Support in choosing parts and additional materials

If you are planning a comprehensive repair or upgrade of the electrical and hybrid system in your Volkswagen and need other elements from the same group, such as battery management modules, additional high-voltage batteries, or 48V system control components, check the available parts in the Electric vehicle batteries and BMS Volkswagen category.

When choosing power components for hybrid systems, it is worth consciously deciding whether to opt for new or used parts. A detailed discussion of the cost, quality, and operational differences can be found in the article Car parts – new or used? We compare costs, quality, and durability, which will help you choose the solution best suited to your budget and expectations.

For users interested in the broader context of solutions used in sporty variants of the Golf, including GTI versions, material describing the evolution of the design and components used may also be useful: Hot-hatch legend: the evolution of the VW Golf GTI from Mk1 to Mk8 – design changes and VW car parts. It allows for a better understanding of the direction of Volkswagen's technology development, including the gradual electrification of drivetrains.