Ignition Coil and Iridium Spark Plugs for Audi TT (2011-2014) 1.8L

Precision-Matched Ignition Kit for 2011-2014 Audi TT

Primary Function: Restores factory secondary ignition voltage and maintains precise combustion timing across the boost band for the 1.8L TFSI engine.

The Stock TT Thermal Degradation and Secondary Breakdown

Factory coil packs on the Audi 8J chassis operate directly above the cylinder head in a compact, heat-dense engine bay. Over sustained heat cycles, the internal epoxy insulation degrades, causing micro-arcing, core resistance creep, and high-rpm misfires under boost. Standard copper or worn dual-metal spark plugs experience rapid gap erosion from high-pressure direct injection, leading to increased coil load, unburnt fuel wash, and catalytic converter stress.

The Engineering Solution

This matched overhaul kit features four high-dielectric coil-on-plug assemblies built with high-conductivity internal copper windings and thermal-shock-resistant silicone boots to isolate spark discharge. Paired with four fine-wire iridium spark plugs, the setup lowers required firing voltage, provides extreme resistance to electrical erosion at operating temperatures exceeding 1,200°F, and stabilizes cold idle and wide-open throttle ignition profiles.

Technical Specifications

Compatibility

• Vehicles: 2011-2014 Audi TT 1.8L L4 4-Cylinder
• OE / Interchange Numbers: UF575, UF-575, UF529, 07K905715D, 07K905715F, 07K905715C, L06F905115G, L07K905715F, 95860210200, 6739303, CLS1139, 5C1684, 921-2110, 5C1773

The Audi Precision Caliber

Engineered to match OEM ECU dwell-time mapping, this kit prevents CEL illumination, cylinder misfire trouble codes (P0300-P0304), and unmetered flame quenching without requiring ignition table modifications.