Audi TT 8N A4 B8 A5 8T Petrol Engine Ignition Coil Set X4 06H905115B

Audi TT 8N A4 B8 A5 8T Petrol Engine Ignition Coil Set X4 is a set of original ignition components designed for Audi petrol engines, ensuring stable system operation and consistent sparking in all conditions. The set of four coils allows for a uniform replacement of the entire bank, which improves engine performance and simplifies diagnostics. This solution is particularly beneficial for preventive ignition maintenance or when experiencing ignition misfire symptoms.

Specifications and technical data

• SKU: 06H905115B-3
• Mark: Audi
• Condition: Used
• OEM Part Number: 06H905115B
• Substitutable numbers: 06H905115B, 06H 905 115 B
• Fuel type: Petrol
• Rim width: 8
• Category: Leaf & Coil Springs

Purpose and technical specifications

The presented ignition coil set is dedicated to Audi vehicles, in particular popular models such as the TT 8N, A4 B8, and A5 8T with petrol engines. The design of the coils is optimized for compatibility with the ignition control system in petrol units, which translates into precise spark triggering and correct engine operation across the entire rev range.

A set of four components allows for even load distribution across all cylinders and reduces the risk of performance discrepancies between individual coils. This is particularly important in modern units, where ignition stability affects not only performance but also exhaust emissions and fuel consumption.

Benefits of installing the ignition coil set

Using a complete set of coils in a single service step brings a number of practical operational benefits:

• smoother engine operation across the entire rev range,
• reduced risk of misfires on individual cylinders,
• easier ignition system diagnostics after replacement,
• consistent electrical parameters for all coils in a single bank.

For users who expect predictable engine behavior, replacing the entire set is a more stable solution than replacing individual components at different intervals. Combined with properly selected spark plugs, this helps reduce vibrations, jerking during acceleration, and sporadic engine control unit errors related to ignition.

Component condition and practical service application

The ignition coil set comes from dismantling and is offered as a used part, which represents a reasonable compromise between cost and functionality for maintenance repairs. Such components are often chosen for ad-hoc repairs, comparative testing, or as an economical solution for older vehicles where the priority is maintaining efficiency at controlled costs.

In workshop practice, a set of four coils works well both for preventive replacement and fault location – it allows for a quick swap of the entire set to verify engine operation without the need to juggle individual elements between cylinders.

Integration with other system components and wheels

The ignition system in a petrol engine works with many components responsible for transferring power to the wheels. In Audi vehicles, where a specific rim width is used, stable engine operation has a direct impact on acceleration smoothness, vehicle behavior at higher speeds, and driving comfort. Properly functioning ignition coils help maintain predictable torque characteristics, which makes it easier to utilize the potential of the chassis.

If you are planning a comprehensive repair or upgrade of the suspension and chassis area in your Audi and need other elements from the same group, such as leaf springs, coil springs, or related mounting components, check the available parts in the Audi leaf springs and coil springs category.

Additional information and technical support

When performing service work related to the ignition system and other components from dismantling, it is worth following proven procedures and practical knowledge. If you want to expand your knowledge on the safe selection of used components and the principles of their installation in the context of body repairs and related systems, the following article may be helpful: Bodywork and chassis – post-accident repairs using dismantled parts.

By following the vehicle manufacturer's service recommendations and using properly selected, original used components, you can effectively maintain the technical efficiency of your car while keeping maintenance costs reasonable.