Ignition Coil Audi A4 S4 B6 A6 C6 A8 D3 4.2 V8 Petrol Engine 077905115Q

The Audi A4 S4 B6 A6 C6 A8 D3 4.2 V8 Ignition Coil is an original ignition system component designed for V8 gasoline engines, ensuring stable high-voltage generation for the spark plugs. Thanks to its factory fit for specific Audi models, the coil guarantees proper compatibility with the engine electronics and predictable operating parameters. This is a practical solution for users looking for a proven OEM component for professional repair or service of the 4.2 V8 unit.

Specifications and technical data

• SKU: 077905115Q
• Mark: Audi
• Condition: Used
• OEM Part Number: 077905115Q
• Substitutable numbers: 077905115Q, 077 905 115 Q
• Fuel type: Petrol
• Category: Leaf & Coil Springs

Purpose and Compatibility

The presented ignition coil has been designed to work in 4.2 V8 gasoline engines used in Audi A4, S4 B6 generation, A6 C6, and A8 D3 models. The OEM design ensures correct electrical and mechanical parameters, which translates to proper ignition control across the entire RPM range. Using a dedicated coil in these powertrains reduces the risk of engine control unit errors and problems with uneven idling.

Technical Characteristics of the Ignition Coil

The coil operates within the engine's ignition system, where it is responsible for converting the vehicle's low voltage into the high voltage required for the spark to jump across the spark plug. The individual coil-per-cylinder technology used allows for precise control of ignition timing, which is particularly important in powerful V8 engines. Appropriate insulation and connector design ensure a stable connection with the wiring harness and spark plug, minimizing energy loss and interference.

Thanks to its factory design, the coil works with the original engine control unit software, maintaining the manufacturer-specified charging times and discharge characteristics. This is important for both performance and the smoothness of the engine's operation, especially during dynamic acceleration and prolonged highway driving.

Application in the 4.2 V8 Engine

In Audi's 4.2 V8 engines, each cylinder requires stable and repeatable ignition of the fuel-air mixture. The ignition coil dedicated to this unit helps maintain proper power, reduce misfires, and decrease the risk of catalytic converter damage resulting from incomplete combustion. A correctly selected coil is also important for smooth engine operation under load, which affects driving comfort and safety.

Using an OEM part in place of a faulty coil is particularly recommended for high-performance engines where the ignition system operates under demanding thermal and electrical conditions. This allows for maintaining the unit's factory operating parameters without the need for modifications to the installation or software.

Condition, Origin, and Benefits of Choosing a Used Part

The offered coil is a used part from a dismantled vehicle, allowing for economical repair while maintaining the original manufacturer's specifications. Choosing such a solution is particularly beneficial for older Audi generations where it is important to combine reasonable service costs with compliance with the factory design. The original Audi design facilitates proper installation in the cylinder head socket and correct fitment with the wiring harness.

Before installation, a standard check of the ignition system is recommended, including the condition of the spark plugs and power wires, to fully utilize the potential of the installed coil. A correctly selected and installed component contributes to stable engine operation, reduced vibrations, and improved throttle response.

Support with Selection and Related Parts

If you are planning a comprehensive repair or upgrade of the suspension area in your Audi and need other parts from the same group, such as leaf springs, coil springs, or additional spring elements, check the available parts in the Audi Leaf and Coil Springs category.

If you are interested in the broader context of using dismantled parts in premium cars and want to better understand how to optimize service costs while maintaining high quality, it is worth reading the article Luxury Within Reach – How to Service a Porsche Legend with Proven Used Parts, which discusses a practical approach to selecting original used components.