Volkswagen Audi Skoda Seat 1.4 TSI TFSI Engine Ignition Coil 04E905110B

Volkswagen Audi Skoda Seat 1.4 TSI TFSI Engine Ignition Coil is an original VAG group ignition system component, designed for direct-injection petrol engines. Thanks to its factory design, it ensures a stable spark, repeatable cylinder operation, and proper cooperation with the engine control electronics. This used OEM component is a sensible choice for servicing 1.4 TSI/TFSI units when you want to maintain performance parameters close to factory specifications.

Specifications and technical data

• SKU: 04E905110B
• Mark: Audi
• Condition: Used
• OEM Part Number: 04E905110B
• Substitutable numbers: 04E905110B, 04E 905 110 B
• Category: Ignition Coils

Purpose and function in the ignition system

The ignition coil in 1.4 TSI/TFSI engines is responsible for converting low voltage from the vehicle's electrical system into the high voltage necessary to generate a spark at the spark plug. In practice, this means:

• reliable ignition of the air-fuel mixture in every engine cycle,
• stable engine operation at idle and under load,
• reduction of misfires and associated engine control unit errors,
• better engine refinement and predictable throttle response.

Using an original VAG group coil allows you to maintain ignition parameters in accordance with the manufacturer's specifications, which is particularly important in modern turbocharged engines.

Benefits of using an original Audi coil

Choosing a coil from the Audi OE line primarily ensures compatibility with the engine's factory design. The component has been engineered to work with specific spark plug types, ignition maps, and engine control strategies. In practice, this translates into:

• precise spark control across the entire RPM range,
• reduced risk of interference with vehicle electronics,
• proper cooperation with OBD diagnostic systems,
• easy installation without the need for wiring modifications.

By maintaining the factory ignition characteristics, the engine handles loads better, and its operation remains predictable both in daily city driving and during dynamic acceleration.

Performance characteristics and installation

As a component in the Ignition coils category, the product is designed for direct installation in the engine cylinder head, in the location provided by the manufacturer. The "coil-on-plug" design simplifies maintenance – access to the component is quick, and replacement does not require specialized modifications.

• compatibility with the factory wiring harness of 1.4 TSI/TFSI units,
• retention of original mounting geometry,
• no need for ECU adaptation after replacing with an OEM part.

The used component allows for an economical repair of the ignition system while maintaining the high build quality typical of original parts.

Condition, origin, and environmental aspect

The coil comes from dismantling and has the status of a used original part, which represents a compromise between repair cost and quality. Choosing such a solution also supports the idea of reusing components in the automotive industry. If you would like to learn more about the benefits of using parts from dismantling – both financial and ecological – check out the article on the circular economy in your garage.

Expanding your Audi ignition system service

If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other components from the same group, such as additional coils, mounting elements, or related connectors, check out the available parts in the Audi ignition coils category.