Ignition Coil & Iridium Spark Plugs for Audi A6 Quattro (2005-2011) 4.2L V8

High-Output Ignition Coil & Iridium Spark Plugs for 2005-2011 Audi A6

What it Does: This direct-replacement ignition coil and iridium spark plug kit restores optimal spark energy and combustion efficiency in the 4.2L V8, resolving misfires and rough idling associated with degraded factory ignition systems.

The Stock A6 Ignition Weakness

The OEM ignition coils on the 4.2L FSI V8 engines are notoriously prone to premature failure due to extreme heat soak within the tight confines of the engine bay. Over time, the constant thermal cycling breaks down the factory epoxy and internal windings. This degradation leads to weak spark propagation, causing intermittent misfires, a rough idle, hesitation under heavy load, and eventually flashing check engine lights. Furthermore, standard factory spark plugs experience accelerated electrode wear under these high-heat, high-compression conditions, compromising combustion dynamics, decreasing fuel economy, and leaving unburnt fuel that can potentially damage the catalytic converters over extended mileage.

The Engineering Solution

This ignition kit engineers a comprehensive fix by utilizing premium-grade copper wire internals within the coils to maximize conductivity and ensure a highly stable voltage output, even under sustained high-rpm loads. The coil housings are manufactured from high-dielectric epoxy and thermal-resistant polymers to actively combat the heat soak generated by the C6 chassis V8. Paired with the included iridium spark plugs, which feature an ultra-fine center electrode, this combination delivers improved spark energy and combustion efficiency. The iridium construction resists spark erosion significantly better than traditional copper or platinum plugs, translating to a more complete, localized burn within the cylinder. This OE+ durability ensures precise ignition timing, restoring factory power delivery and resolving chronic drivability issues.

Technical Specifications

Compatibility

• 2005 Audi A6 Quattro 4.2L V8
• 2006 Audi A6 Quattro 4.2L V8
• 2007 Audi A6 Quattro 4.2L V8
• 2008 Audi A6 Quattro 4.2L V8
• 2009 Audi A6 Quattro 4.2L V8
• 2010 Audi A6 Quattro 4.2L V8
• 2011 Audi A6 Quattro 4.2L V8

The Audi Precision Standard

European luxury vehicles require strict electrical tolerances to maintain factory performance and avoid phantom check engine lights. This ignition kit guarantees exact voltage specifications to keep your C6 running seamlessly without throwing codes.