Audi TT 8N A3 8L A4 B6 Ignition Coil 1.8 Petrol Quattro BAM 06A905115D

Audi TT 8N A3 8L A4 B6 Ignition Coil 1.8 Petrol Quattro BAM is an original ignition system component from the Ignition coils group, designed for 1.8 petrol engines. This used OEM part ensures proper spark characteristics, stable engine operation, and full compatibility with the factory Audi electrical installation.

Specifications and technical data

• SKU: 06A905115D
• Mark: Audi
• Condition: Used
• OEM Part Number: 06A905115D
• Substitutable numbers: 06A905115D, 06A 905 115 D
• Fuel type: Petrol
• Part type: Ignition Coil
• Category: Ignition Coils

Purpose and function in the ignition system

The presented ignition coil is responsible for generating the high voltage required to create a spark in the cylinders of a petrol engine. It has been designed to work with 1.8 units in Audi TT 8N, A3 8L, and A4 B6 models with Quattro drive, which translates into correct operating parameters across the entire rev range. Thanks to its factory design, the coil works with the original engine control unit, maintaining correct charging and discharging times, which reduces the risk of misfires, rough idling, or power drops during acceleration.

Benefits of using an original Audi coil

Using an original ignition coil in a 1.8 petrol engine provides a number of practical operational benefits:

• maintaining the factory ignition characteristics and engine refinement,
• proper cooperation with the electrical installation and engine control system,
• reducing the risk of ignition errors and associated fault codes in the ECU,
• stable cold and warm starts, provided the spark plugs and installation are in good condition. The used OEM component is a cost-effective solution that is technically matched to the specifics of Audi petrol engines, which is particularly important in turbocharged units sensitive to spark quality.

Compatibility and installation

The coil has been designed for direct installation into the spark plug socket, without the need for any wiring modifications or additional adapters. Thanks to the retention of the factory shape and electrical connectors, the installation process is straightforward, and the risk of leaks or mechanical looseness is minimized. When replacing, it is recommended to:

• check the condition of the spark plug sockets and ground wires,
• verify that the electrical connector plug shows no signs of overheating,
• replace coils in sets for a given cylinder bank in case of recurring ignition faults.

Operating characteristics in a petrol engine

The coil is intended for units powered by petrol, where precise control of the ignition timing is required. In combination with properly selected spark plugs, it ensures stable combustion, which helps maintain correct exhaust emission parameters and fuel economy. For 1.8 engines with Quattro drive, the repeatability of ignition parameters under load is particularly important; therefore, using an original coil allows for predictable vehicle behavior both in daily driving and during dynamic acceleration.

Condition and service application

The offered ignition coil is a used component, making it an attractive option for servicing older Audi TT 8N, A3 8L, and A4 B6 vehicles. It serves as a replacement in case of faults such as misfires, jerking during acceleration, or starting problems, provided that the entire ignition system has been properly diagnosed. It can be used both as a single replacement for a damaged part and as part of broader service work involving spark plugs, the ignition harness, and engine control unit inspection. If you are planning a comprehensive repair or upgrade of your Audi engine area and need other components from the same group, such as individual ignition modules, complete coil assemblies, or additional mounting hardware, check the available parts in the Audi ignition coils category. If you want to expand your knowledge about cost-effective service solutions for engine accessories and air conditioning systems, it is worth reading the guide No cooling in the car: an original used A/C compressor as a proven alternative to expensive new parts, which shows when used OEM components are a reasonable choice.