This BDFHYK UF529 ignition coil and 4644 iridium spark plug set is designed for listed Audi and Volkswagen applications that use a matching UF529-style ignition coil and 4644 spark plug reference. It is intended for ignition service when the original coils or spark plugs have been diagnosed as worn, weak, damaged, or related to misfire symptoms. Before ordering, confirm exact year, model, engine, OE reference, connector shape, spark plug specification, and service quantity.
| Make | Listed Models | Fitment Check |
|---|---|---|
| Audi | A3, A4, allroad Quattro, A5 Quattro, Q5, TT Quattro | Confirm engine, UF529-style coil, 4644 plug reference, connector, and original ignition layout. |
| Volkswagen | Beetle, CC, Eos, Golf R, GTI, Jetta, Passat, Tiguan | Compare the removed coil, spark plug reference, connector shape, and service information. |
Fitment note: Audi and Volkswagen ignition parts can vary by engine and production configuration. Do not order by model name alone; OE reference, connector shape, plug specification, and service quantity must match.
Ignition coils and spark plugs may need inspection when the engine has rough idle, hard start, hesitation, misfire symptoms, poor acceleration, reduced fuel economy, or a check engine light. These symptoms can also come from wiring, oil or moisture in plug wells, fuel delivery issues, intake leaks, sensor faults, or compression problems. For component comparison, review VW Audi coil and plug comparison notes.
Install on a cool engine, inspect plug wells for oil or moisture, and follow Audi or Volkswagen service information for torque and gap. If symptoms remain after installation, continue diagnosis by checking wiring, fuel delivery, intake leaks, injector operation, and compression. This BDFHYK set is an OE-style aftermarket replacement, not a factory-branded Audi or Volkswagen part.
BDFHYK 4 Ignition Coil UF529 and 4 Iridium Spark Plug 4644 for Audi A3, A4, Allroad Quattro, A5 Quattro, Q5, TT Quattro
